SkatterBencher #80: Ryzen 7 9700X Extreme Overclocked to 6325 MHz

We overclock the AMD Ryzen 7 9700X to 6325 MHz with the ASUS ROG Crosshair X670E Gene motherboard and extreme liquid nitrogen cooling.

In this special SkatterBencher guide, we’re overclocking the Ryzen 7 9700X to 6325 MHz with the ultimate form of extreme sub-zero cooling: liquid nitrogen.

First, I will show how improving the thermal solution automatically gives you more performance when Precision Boost is enabled. Then, for the final overclocking strategy with extreme cooling, we once again rely on asynchronous eCLK and curve shaper to push the Precision Boost algorithm to the max.

In this video, I share two distinct overclocking strategies

  • First, we rely on OC Strategy #5 from SkatterBencher #78 and simply improve the cooling.
  • Second, we maximize the Precision Boost performance by leveraging the extra thermal headroom to increase the frequency with asynchronous eCLK.

However, before we jump into overclocking, let us quickly review the hardware, and the benchmarks, as well as get back up to speed on the overclocking strategy from the original SkatterBencher #78.

AMD Ryzen 7 9700X Extreme: Introduction

The AMD Ryzen 7 9700X is part of AMD’s Zen 5-based Ryzen 9000 desktop processor product line codenamed “Granite Ridge.” The Granite Ridge processors were introduced on June 2, 2024, during Computex, and launched two months later in early August.

The Ryzen 7 9700X has a base clock of 3.8 GHz and a listed boost frequency of up to 5.5 GHz. Unlike its predecessor, its TDP is capped at 65W. In SkatterBencher #78, I demonstrate the performance tuning options of the Ryzen 7 9700X in five unique overclocking strategies. In the final, most advanced strategy we push the processor up to 5860 MHz with AIO cooling. 

AIO overclock

Platform Overview

The system we’re overclocking today consists of the following hardware.

ItemSKUPrice (USD)
CPUAMD Ryzen 7 9700X359
MotherboardASUS ROG Crosshair X670E Gene600
CPU CoolingElmorLabs Volcano LN2 Container ElmorLabs HOT300 Heater Controller ElmorLabs HOT300 Heater CPU Backplate260
20
30
MemoryG.SKILL Trident Z5 DDR5-6400 32GB110
Power SupplyEnermax PlatiGemini 1200W250
Graphics CardASUS ROG Strix RTX 2080 TI490
StorageAGI 512GB NVMe M.2 Gen375

For this guide, I traveled to the ElmorLabs office in downtown Taipei and was able to use the platform he used to break the 3DMark CPU Profile 16 thread record a couple of weeks ago. The CPU, memory, storage, and graphics card are the same as in the original SkatterBencher guide.

The key to success for this overclocking guide is the ElmorLabs extreme overclocking products, including the Volcano CPU pot and the HOT300 heater components.

Benchmark Software

We use the same Windows 11 and benchmark applications to measure performance and ensure system stability.

BENCHMARKLINK
Pyprime 2.0https://github.com/mbntr/PYPrime-2.x
7-Zip 19.0https://www.7-zip.org/
IndigoBenchhttps://www.indigorenderer.com/indigobench
Geekbench 6https://www.geekbench.com/
Cinebench 2024.1https://www.maxon.net/en/cinebench/
CPU-Zhttps://www.cpuid.com/softwares/cpu-z.html
V-Ray 6https://www.cpuid.com/softwares/cpu-z.html
Corona Benchmarkhttps://corona-renderer.com/benchmark
AI-Benchmarkhttps://ai-benchmark.com/
3DMark CPU Profilehttps://ai-benchmark.com/
3DMark Night Raidhttps://www.3dmark.com/
3DMark Solar Bayhttps://www.3dmark.com/
Returnalhttps://store.steampowered.com/app/1649240/Returnal/
Shadow of the Tomb Raiderhttps://store.steampowered.com/app/750920/Shadow_of_the_Tomb_Raider_Definitive_Edition/
Final Fantasy XVhttps://store.steampowered.com/app/750920/Shadow_of_the_Tomb_Raider_Definitive_Edition/
OCCThttps://www.ocbase.com/
AIDA64https://www.aida64.com/

SB#78 OCS#5: Benchmark Performance Improvement

Before we head down to negative temperatures, let’s review the performance improvement when overclocking the Ryzen 7 9700X with AIO cooling in SkatterBencher #78. Here are the Precision Boost 2 parameters we used in OC Strategy #5:

  • TDP: 65 W
  • PCC: 508 W
  • THM: 95 C
  • PPT: 1000 W
  • TDC CPU: 1000 A
  • EDC CPU: 1000 A
  • VID: 1.40 V
  • FIT: 19911 (10X)
  • FMAX: 5750 MHz
  • ECLK: 104.3 MHz
  • FCLK: 2200 MHz
  • UCLK: 3200 MHz
  • MCLK: 3200 MHz
  • Curve Shaper: Low/Med Frequency -30

Here is the benchmark performance improvement over stock:

  • Geomean: +11.15%
  • PYPrime 32B: +40.13%
  • 7-Zip: +17.83%
  • IndigoBench (bedroom): +17.48%
  • Geekbench 6 (single): +7.88%
  • Geekbench 6 (multi): +23.26%
  • Cinebench R23 Single: +8.96%
  • Cinebench R23 Multi: +21.99%
  • CPU-Z V17.01.64 Single: +4.80%
  • CPU-Z V17.01.64 Multi: +12.39%
  • V-Ray 5: +23.55%
  • Corona 10: +21.49%
  • AI Benchmark: +29.04%
  • 3DMark Night Raid: +10.53%
  • 3DMark Solar Bay: +2.65%
  • Returnal: +1.85%
  • Tomb Raider: +6.19%
  • Final Fantasy XV: +8.71%

Here is the 3DMark CPU Profile performance improvement over stock:

  • CPU Profile 1 Thread: +5.19%
  • CPU Profile 2 Threads: +5.17%
  • CPU Profile 4 Threads: +4.84%
  • CPU Profile 8 Threads: +11.39%
  • CPU Profile 16 Threads: +17.03%
  • CPU Profile Max Threads: +17.16%

Here is the AIDA64 memory benchmark performance improvement over stock:

  • Memory Read Bandwidth: +33.98%
  • Memory Write Bandwidth: +48.91%
  • Memory Copy Bandwidth: +35.05%
  • Memory Latency: +31.28%

When running the OCCT CPU AVX2 Stability Test, the average CPU core effective clock is 5391 MHz with 1.150 volts. The average CPU temperature is 95.5 degrees Celsius. The average CPU package power is 172.5 watts.

When running the OCCT CPU SSE Stability Test, the average CPU core effective clock is 5494 MHz with 1.222 volts. The average CPU temperature is 95.2 degrees Celsius. The average CPU package power is 172.1 watts.

The boost frequency at 1 active thread is about 5758 MHZ and the average boost frequency gradually trails off to 5454 MHz when all cores are active. All eight cores can boost to well beyond 5.8 GHz in single-threaded workloads.

Of course, with our ultimate thermal solution, we can reduce the operating temperature significantly and that’s exactly what we’ll do in our first overclocking strategy.

OC Strategy #1: Extreme Cooling

In our first overclocking strategy, we simply take advantage of the benefits of extreme cooling like liquid nitrogen cooling.

Hardware for Extreme Cooling

An effective setup for extreme cooling with liquid nitrogen consists of two key elements: the LN2 container in which we pour the nitrogen, and a backplate heater to help with condensation. For this guide, I use the ElmorLabs Volcano LN2 container and the ElmorLabs HOT300 heater controller and CPU backplate.

extreme cooling setup

Precision Boost 2 Technology

Experienced AMD Ryzen overclockers are well aware that there are two distinct approaches to overclocking: Precision Boost Overdrive and OC Mode.

With Precision Boost Overdrive, we finetune the Precision Boost 2 boosting algorithm which is active by default on all AMD Ryzen CPUs. The main advantage is that you maintain the maximum boost capabilities for both 1T and nT workloads.

In OC Mode, we disable all automatic boosting technologies and associated telemetry. It enables us to set a specific frequency and voltage and run at higher temperatures, which helps maximize the performance in specific workloads. The upside is that sometimes you get better performance than Precision Boost, however, you always sacrifice performance in 1T workloads due to the lack of automatic boost.

ryzen 9000 overclocking modes

Traditionally, overclocking with extreme cooling is done with OC Mode. But, for this overclocking guide, my goal is to stick with Precision Boost and see how far the algorithm can be pushed.

That may sound straightforward, but there’s a lot to it because the Precision Boost algorithm relies on the CPU’s VFT – not VF – curve for automatic performance scaling. That one letter makes all the difference when we use extreme cooling solutions.

Voltage-Frequency-Temperature Curve

Let’s start with the basics: what is a VFT curve? Simply put: a voltage-frequency-temperature curve describes the relationship between an operating frequency, the operating temperature, and the voltage required to operate at that frequency and temperature.

While every modern SoC has a factory-fused voltage-frequency curve to dynamically adjust the power consumption depending on the workload needs, not all SoCs have a temperature aspect.

It’s not easy to visualize a VFT curve because of its 3 dimensions: voltage, frequency, and temperature. So, instead, let’s first look at the V/F curve at a fixed temperature and then see how changing the temperature affects the curve. Here’s the default voltage-frequency curve of this Ryzen 7 9700X at an operating temperature of 50 degrees Celsius.

Let’s now add the V/F curve of the same CPU but at an operating temperature of 0 degrees Celsius.

We can immediately make a couple of important observations.

First of all, clearly, this CPU has a different voltage-frequency curve at different temperatures. This clearly outlines that we should always talk about Ryzen’s VFT curve rather than the VF curve.

Furthermore, the V/F curve deviates more at higher frequencies than at lower frequencies. For example, the difference at 4550 MHz between 0C and 50C is only 36 mV (1.009V vs 1.045V). However, at 5.5 GHz the difference is 150 mV (1.17V vs 1.32V).

Lastly, we can see that at a similar voltage, there’s much more frequency headroom at lower temperatures. For example, 1.2V yields 5250 MHz at 50C but 5550 MHz at 0C.

The cool thing – literally – is that Precision Boost scales with extreme, negative temperatures too. In this chart, we measure the operating voltage at different operating temperatures with the CPU at 5.3 GHz running a light all-core workload.

ryzen 7 9700x fmax temperature scaling

We find that at high, near-TjMax temperatures, almost 1.3V is required for 5.3 GHz. However, at 0 degrees Celsius, it only needs less than 1.15V. At -50 degrees Celsius, the operating voltage is below 1.1V.

The general takeaway is that by reducing the operating temperature, we’re warping the CPU voltage-frequency curve. But cooling is not the only way to warp the V/F curve … we also do that with asynchronous eCLK.

ECLK & VFT Curve

In the final overclocking strategy of SkatterBencher #78, I Illustrate how overclocking with asynchronous eCLK works. I won’t discuss the details here at length, but all you need to know is that ECLK stretches the V/F curve along the frequency axis. In OC Strategy #5 of SkatterBencher #78, we use an ECLK of 104.3 MHz. This is what such a curve looks like.

Using asynchronous eCLK for overclocking works in two ways: it undervolts and overclocks at the same time. You can see, for example, that our default curve demands 1.126V for 5 GHz whereas our ECLK curve only demands 1.085V. Also, at 1.3V, with ECLK we get about 230 MHz more than with the default curve.

The ECLK-adjusted curve looks a lot like our temperature-adjusted curve, but it’s not exactly the same.

ryzen 7 9700x vf curve lower temperature

We find that, generally, the 0-degree curve provides for slightly more undervolting across the majority of the curve. However, at the very upper end of the curve, the impact of ECLK is more significant as we reach higher frequencies.

But what if we get the best of both worlds: asynchronous eCLK and lower temperatures? Now the curve is starting to look pretty impressive! Not only do we get the most undervolting at the lower end of the curve – 5 GHz at only 1.045V – we also get significantly higher frequency at the upper end of the curve: up to 6 GHz at 1.387V!

ryzen 7 9700x vf curve eclk vft

Now that we know that simply lowering the operating temperature will give us automatically higher frequencies, let’s have a look at the performance impact.

BIOS Settings & Benchmark Results

The BIOS configuration for this overclock is identical to the one from SkatterBencher #78, OC Strategy #5, except that we don’t use Curve Shaper.

Upon entering the BIOS

  • Go to the Extreme Tweaker menu
  • Set Ai Overclock Tuner to EXPO II
  • Set eCLK Mode to Asynchronous mode
    • Set BCLK2 Frequency to 104.30
  • Enter the DRAM Timing Control submenu
    • Enter the Memory Presets submenu
      • Select Load Hynix 6400MHz 1.4V 2x16GB SR and click OK
    • Leave the Memory Presets submenu
    • Set Tcl, Trccd, and Tras according to the EXPO kit
    • Set Tras to 38
  • Leave the DRAM Timing Control submenu
  • Switch to the Advanced menu
  • Enter the AMD Overclocking submenu and click accept
    • Enter the DDR and Infinity Fabric Frequency/Timings submenu
      • Enter the Infinity Fabric Frequency and Dividers submenu
        • Set Infinity Fabric Frequency and Dividers to 2200 MHz
        • Set UCLK DIV1 MODE to UCLK=MEMCLK
      • Leave the Infinity Fabric Frequency and Dividers submenu
    • Leave the DDR and Infinity Fabric Frequency/Timings submenu
    • Enter the Precision Boost Overdrive submenu
      • Set Precision Boost Overdrive to Advanced
      • Set PBO Limits to Motherboard
      • Set Precision Boost Overdrive Scalar Ctrl to Manual
        • Set Precision Boost Overdrive Scalar to 10X
      • Set CPU Boost Clock Override to Enabled (Positive)
        • Set Max CPU Boost Clock Override to 200
    • Leave the Precision Boost Overdrive submenu
    • Enter the SoC/Uncore OC Mode submenu
      • Set SoC/Uncore OC Mode to Enabled
    • Leave the SoC/Uncore OC Mode submenu
    • Enter the SoC Voltage submenu
      • Set SoC Voltage to 1300

Then save and exit the BIOS.

We re-ran the benchmarks and checked the performance increase compared to the default operation.

  • Geomean: +13.77%
  • PYPrime 32B: +43.44%
  • 7-Zip: +23.35%
  • IndigoBench (bedroom): +24.79%
  • Geekbench 6 (single): +11.47%
  • Geekbench 6 (multi): +27.88%
  • Cinebench R23 Single: +11.94%
  • Cinebench R23 Multi: +28.90%
  • CPU-Z V17.01.64 Single: +7.72%
  • CPU-Z V17.01.64 Multi: +19.33%
  • V-Ray 5: +30.48%
  • Corona 10: +29.86%
  • AI Benchmark: +32.92%
  • 3DMark Night Raid: +12.64%
  • 3DMark Solar Bay: +1.57%
  • Returnal: +1.85%
  • Tomb Raider: +5.67%
  • Final Fantasy XV: +8.86%

Here are the 3DMark CPU Profile scores:

  • CPU Profile 1 Thread: +8.59%
  • CPU Profile 2 Threads: +7.35%
  • CPU Profile 4 Threads: +10.44%
  • CPU Profile 8 Threads: +17.79%
  • CPU Profile 16 Threads: +25.01%
  • CPU Profile Max Threads: +25.25%

Here are the AIDA64 memory benchmark scores:

  • Memory Read Bandwidth: +34.27%
  • Memory Write Bandwidth: +53.82%
  • Memory Copy Bandwidth: +33.79%
  • Memory Latency: +37.46%

With the extreme cooling like LN2 cooling we essentially eliminate any thermal-related performance throttling. As the CPU is now running at 6 GHz across all cores in 1T and nT workloads, we see a significant performance increase across the board.  The Geomean performance improvement is +13.77% which is 2 percentage points better than our AIO cooled system. We see a maximum improvement of +43.44% in the PyPrime.

ryzen 7 9700x pbo ln2 geomean performance improvement

When running the OCCT CPU AVX2 Stability Test, the average CPU core effective clock is 5939 MHz with 1.184 volts. The average CPU temperature is -48.2 degrees Celsius. The average CPU package power is 174.8 watts.

When running the OCCT CPU SSE Stability Test, the average CPU core effective clock is 5993 MHz with 1.289 volts. The average CPU temperature is -24.7 degrees Celsius. The average CPU package power is 174.7 watts.

The boost frequency at 1 active thread to all active threads is about 6000 MHZ. Each of the 8 cores can boost to nearly 6 GHz in single-threaded workloads.

Before we move on to the next OC Strategy, I want to share this cool chart that quite beautifully illustrates the impact of temperature on the operating voltage and frequency.

In this chart, we’re cooling down the CPU from 85 to -40 degrees Celsius while running an all-core workload. We can distinguish three phases.

ryzen 7 9700x vft temperature scaling

In the first phase, from 85 to 40 degrees Celsius, the Precision Boost algorithm gradually allows higher voltage. At 85 degrees Celsius the maximum allowed voltage is 1.3V and at 40 degrees Celsius it’s 1.375V. Below 40 degrees Celsius, the maximum voltage doesn’t change. During this phase, the frequency increases from 5575 MHz at 1.3V to 5825 MHz at 1.375V.

In the second phase, from 40  to about 0 degrees Celsius, the operating frequency continues to increase while maintaining the maximum allowed voltage of 1.375V. This is the effect of the VFT algorithm. By decreasing the temperature, we undervolt the CPU. As a result, gradually higher and higher points on the VF curve drop below the voltage threshold. At 40 degrees Celsius, we get 5825 MHz for 1.375V and at 0 degrees Celsius that’s 6000 MHz.

In the third phase, from 0 to -40 degrees Celsius, the operating voltage continues to reduce as the temperature gets lower. This is the best visualization I could come up with to illustrate the Precision Boost VFT curve. At 0 degrees Celsius we get 6 GHz at 1.375V, but by the time the temperature has dropped to -40 degrees Celsius, we only need 1.25V for the same 6 GHz.

ryzen 7 9700x vft temperature scaling examples

OC Strategy #2: Maximum Boost

In our second and final overclocking strategy, we look to maximize the performance by pushing the Precision Boost algorithm to its limit with Asynchronous ECLK and Curve Shaper.

In the previous OC Strategy, I explained the impact of a lower temperature on the CPU V/F curve. It gave us a significant increase in frequency and performance. But there’s another effect of lower temperatures: there should also be higher overclocking headroom.

That’s what we’ll try to figure out now.

Positive Curve Optimizer

Observant viewers will have noticed something important about the V/F curves shown in the previous overclocking strategy. They all end at approximately 1.4V.

I’ve discussed this at length in the original SkatterBencher guide for the Ryzen 7 9700X.

The long story short is that this CPU has a voltage limit for all-core workloads of 1.35V. We can increase this slightly to 1.375V by adjusting the Precision Boost Overdrive scalar to 10X. But that’s about it. Furthermore, the voltage limit for 1T workloads is 1.4V though we sometimes see slight excursions up to 1.45V in idle scenarios.

This voltage limit is a severe restriction for our overclocking attempt since we cannot leverage higher voltages to achieve higher frequencies. However, we can use the Precision Boost Overdrive toolkit to push more below the 1.4V threshold. Specifically, we can use a positive Curve Optimizer. Contrary to using a negative Curve Optimizer, when using positive values, we actually overvolt the V/F curve. Here’s what happens when we apply a +30 Curve Optimizer to our V/F curve from OC Strategy #1.

We can see that the entire curve has shifted upwards along the voltage axis. We not only need a lot more voltage for a given frequency, but also our maximum frequency has decreased significantly.

At first sight, this looks like a terrible idea. However, we can now utilize asynchronous ECLK to push up the frequency again. For example, this is what the curve would look like with a 110 MHz ECLK frequency.

ryzen 7 9700x pbo extreme 110mhz eclk

Compared to the previous OC Strategy, at 110 MHz ECLK, we need more voltage for frequencies below 5.9 GHz. However, we get higher frequencies above that. With this starting point in mind, I set about my extreme overclocking journey.

ECLK Tuning Process

The manual tuning process for eCLK tuning is quite convoluted since it affects the CPU core stability in all scenarios ranging from very light single-threaded workloads to heavy all-core workloads.

When we’re trying to optimize the performance, whether with Curve Optimizer or Asynchronous ECLK, we always try to find the weakest link. During the SkatterBencher preparation with the Ryzen 5 9600X, I found that the Y-Cruncher BKT workload is typically the first to show signs of instability when pushing the frequency.

So, my tuning process for this strategy was to first look for instability in the Y-Cruncher BKT workload, and then adjust from there. I load up Y-Cruncher BKT and run it on all cores. Then I gradually decrease the temperature from +80 degrees to -50 degrees. Unfortunately, I quickly noticed that the system became unstable at around +48 degrees Celsius.

To address this issue, I used Curve Shaper and set a positive magnitude for Medium, High, and Maximum Frequency at High Temperature. That resulted in a slightly more stable system as it only crashed around +37 degrees Celsius. Then, I also set all Med Temperature points to +15 which resulted in a stable system.

ryzen 7 9700x pbo extreme eclk ycruncher bkt issue

Our final V/F curve at -50 degrees Celsius now looks as follows:

ryzen 7 9700x pbo extreme eclk v/f curve

We can see that, technically, our V/F curve is not as good as the final strategy of SkatterBencher #78 because we’re not running as low voltages below 5.3 GHz. But that doesn’t matter, because due to the sub-zero temperature our CPU always runs at 6325 MHz. That’s the highest available point of the V/F curve.

So, let’s have a look at the BIOS configuration and the performance results.

BIOS Settings & Benchmark Results

Upon entering the BIOS

  • Go to the Extreme Tweaker menu
  • Set Ai Overclock Tuner to EXPO II
  • Set eCLK Mode to Asynchronous mode
    • Set BCLK2 Frequency to 110.00
  • Enter the DRAM Timing Control submenu
    • Enter the Memory Presets submenu
      • Select Load Hynix 6400MHz 1.4V 2x16GB SR and click OK
    • Leave the Memory Presets submenu
    • Set Tcl, Trccd, and Tras according to the EXPO kit
    • Set Tras to 38
  • Leave the DRAM Timing Control submenu
  • Switch to the Advanced menu
  • Enter the AMD Overclocking submenu and click accept
    • Enter the DDR and Infinity Fabric Frequency/Timings submenu
      • Enter the Infinity Fabric Frequency and Dividers submenu
        • Set Infinity Fabric Frequency and Dividers to 2200 MHz
        • Set UCLK DIV1 MODE to UCLK=MEMCLK
      • Leave the Infinity Fabric Frequency and Dividers submenu
    • Leave the DDR and Infinity Fabric Frequency/Timings submenu
    • Enter the Precision Boost Overdrive submenu
      • Set Precision Boost Overdrive to Advanced
      • Set PBO Limits to Motherboard
      • Set Precision Boost Overdrive Scalar Ctrl to Manual
        • Set Precision Boost Overdrive Scalar to 10X
      • Set CPU Boost Clock Override to Enabled (Positive)
        • Set Max CPU Boost Clock Override to 200
      • Enter the Curve Optimizer submenu
        • Set Curve Optimizer to All Cores
        • Set All Core Curve Optimizer Sign to Positive
        • Set All Core Curve Optimizer Magnitude to 30
      • Leave the Curve Optimizer submenu
      • Enter the Curve Shaper submenu
        • For Medium, High, and Max Frequency, set Medium and High Temperature to Enable
        • For Medium, High, and Max Frequency, set Medium and High Temperature Sign to Positive
        • For Medium, High, and Max Frequency, set Medium and High Temperature Magnitude to 15
      • Leave the Curve Shaper submenu
    • Leave the Precision Boost Overdrive submenu
    • Enter the SoC/Uncore OC Mode submenu
      • Set SoC/Uncore OC Mode to Enabled
    • Leave the SoC/Uncore OC Mode submenu
    • Enter the SoC Voltage submenu
      • Set SoC Voltage to 1300

Then save and exit the BIOS.

We re-ran the benchmarks and checked the performance increase compared to the default operation.

  • Geomean: +16.24%
  • PYPrime 32B: +44.47%
  • 7-Zip: +30.04%
  • IndigoBench (bedroom): +31.67%
  • Geekbench 6 (single): +15.96%
  • Geekbench 6 (multi): +31.57%
  • Cinebench R23 Single: +17.16%
  • Cinebench R23 Multi: +34.29%
  • CPU-Z V17.01.64 Single: +13.04%
  • CPU-Z V17.01.64 Multi: +26.15%
  • V-Ray 5: +35.95%
  • Corona 10: +36.56%
  • AI Benchmark: +36.59%
  • 3DMark Night Raid: +16.94%
  • 3DMark Solar Bay: +1.23%
  • Returnal: +1.85%
  • Tomb Raider: +5.67%
  • Final Fantasy XV: +8.44%

Here are the 3DMark CPU Profile scores:

  • CPU Profile 1 Thread: +14.32%
  • CPU Profile 2 Threads: +13.33%
  • CPU Profile 4 Threads: +16.12%
  • CPU Profile 8 Threads: +24.59%
  • CPU Profile 16 Threads: +31.81%
  • CPU Profile Max Threads: +31.68%

Here are the AIDA64 memory benchmark scores:

  • Memory Read Bandwidth: +33.25%
  • Memory Write Bandwidth: +52.00%
  • Memory Copy Bandwidth: +33.64%
  • Memory Latency: +36.27%

The additional thermal headroom provided us with another 500 MHz over our best overclocking strategy from SkatterBencher #78. That translates into another impressive jump in performance across the board … except for our gaming benchmarks which barely improve even at the much higher frequencies. The Geomean performance improvement is +16.24%, and we get a maximum improvement of +43.47% in PYPrime.

ryzen 7 9700x pbo extreme eclk geomean performance improvement

When running the OCCT CPU AVX2 Stability Test, the average CPU core effective clock is 6115 MHz with 1.188 volts. The average CPU temperature is -47.8 degrees Celsius. The average CPU package power is 179.3 watts.

ryzen 7 9700x pbo extreme eclk avx2 occt stress test

When running the OCCT CPU SSE Stability Test, the average CPU core effective clock is 6321 MHz with 1.294 volts. The average CPU temperature is -48.1 degrees Celsius. The average CPU package power is 178.8 watts.

ryzen 7 9700x pbo extreme eclk occt sse stress test

The boost frequency at 1 active thread to all active threads is about 6325 MHZ. Each of the 8 cores can boost to 6325 MHz in single-threaded workloads.

ryzen 7 9700x pbo extreme eclk boost curve

AMD Ryzen 7 9700X Extreme: Conclusion

Alright, let us wrap this up.

This was the first time I tried Precision Boost extreme overclocking with liquid nitrogen since normally we’d use OC Mode for extreme overclocking. It was quite interesting to see how the dynamic VFT curve is impacted by extreme, negative temperatures. Also, it was really nice to see Curve Shaper play a significant role in maximizing the overclock. Without its temperature points, we would’ve had to significantly reduce the CPU frequency.

Overall, the performance improvement is of course pretty good. But I’m very confused by the gaming performance results. I know I’m not running the latest graphics card … but I’m also not running only recent triple-A game titles. I would’ve expected a bigger performance improvement since we’re running at significantly higher frequencies than stock.

Anyway, that’s all for now. I will certainly overclock more Zen 5 processors in the future, so stay tuned for that. I want to thank my Patreon supporters for supporting my work. If you have any questions or comments, please drop them in the comment section below. 

Untill the next time!

Leave A Comment