AVX ratio offset OC
AVX ratio offset OC
It seems OCCT is being particular. They handle tough math challenges and will throw an error if the result doesn’t match what’s stored.
If you’re satisfied with your setup, just leave it alone. I’m obsessed with tests being flawless, so I always crank up the voltage to keep everything steady.
We have a technology known as Advanced Vector Extensions (AVX), a novel approach to computation instructions. However, it imposes significant demands on the CPU and can cause overheating. The AVX ratio offset is typically configured at negative 2, which helps reduce temperature by allocating 4.5GHz for non-AVX and 4.3GHz for AVX. Additionally, programs that rely heavily on AVX include:
https://en.wikipedia.org/wiki/Advanced_V...plications
Moreover, recent stress tests such as Prime95 26.6v+ are particularly concerning.
Zebarjadi.raouf :
There is something called Advanced Vector Extensions(AVX), a new calculation method. It causes too much CPU load and overheating. The AVX ratio offset is typically negative 2, which helps reduce temperature by using 4.5GHz for non-AVX and 4.3GHz for AVX. Also, popular programs that use AVX include the ones listed on Wikipedia. Every new stress test, like Prime95 26.6v+, should be considered. Since OCCT also uses AVX, should I use it too? And should the AVX offset remain at 2?
Whatever you prefer, OCCT works well too.
Many users configure it to 1 or 2 (negative). Feel free to choose any or tweak it during stability testing. AVX may push temperatures up to 80+ or 90+ when under high voltage, so adjustments are often needed.
Most games avoid using AVX, AVX2 or AVX-512 instructions, which are mainly used in professional tools like Blender. For testing CPU performance under real conditions, Prime95 version 26.6 small fft is the best choice because it provides a steady 100% CPU load. This differs from OCCT and Aida64, which rely on linpack and cause fluctuating RAM usage, leading to temperature changes. For air coolers, a quick 15-minute test is sufficient; for AIO or liquid cooling systems, allow at least 30 minutes for the coolant to settle. Temperatures reflect stability rather than reliability. To ensure stability in OC, use Asus RealBench and run it for several hours. This will engage all CPU instructions, including AVX/2 in Blender, simulating a demanding "thinking" session. If the system remains stable under prolonged use, it should handle games effectively.
Karadjgne shared his findings on testing CPU performance. He noted that most games don’t rely on AVX, AVX2 or AVX-512 instructions, which are mainly used in professional software like Blender. For quick CPU load tests, Prime95 version 26.6 small fft is recommended because it provides a steady 100% CPU usage, unlike OCCT and Aida64 that depend on linpack and cause fluctuating temperatures. For air coolers, a short 15-minute test is sufficient, while liquid cooling systems need at least a half-hour test to let the coolant settle. He emphasized that temperature stability isn’t the only factor—OC stability should be tested over several hours using tools like Asus RealBench, which fully utilizes CPU instructions including AVX/2 in Blender. He also mentioned that an AVX offset is a safety measure; it helps maintain stable temperatures and lower vcore even if the system drops to higher speeds. He confirmed his OCCT test with an offset of 2 passed, but questioned whether that still guarantees stability at 4.3 GHz. He plans to run more tests soon.
Zebarjadi.raouf shares his experience. OCCT works well too. Many users set it to 1 or 2 (negative). Adjust as needed during stability tests. AVX may raise temperatures to over 80 or 90 under high voltage, so reduce the setting. I’m using 1.270v and it stays stable—no BSODs, passes IBT (20 passes), Cinabench and AIDA 64 for an hour, no offset needed. OCCT seems less reliable after a few seconds, but with AVX offset 2 it functions. It’s possible my OC remains stable even at 4.3 Ghz.
If it failed, it indicates the device couldn't manage the increased load from AVX. I would raise the voltage to 1.275v while maintaining an AVX offset of 2. Also, performance drops to 4.3GHz only when AVX is active and games don't rely on it. Also, did you manually configure the LLC? This can assist in OC by avoiding voltage drop. Level 4 or higher (50%) is advised. Test for a few days with software and games. If no issues arise, it's stable.
Zebarjadi.raouf :
If it failed, it shows the device couldn't manage the increased load from AVX. I’d raise the voltage to 1.275v and maintain AVX offsets at 2. Also, performance drops to 4.3GHz only when AVX is active and games don’t rely on it. Also, did you adjust the LLC settings manually? That can assist in avoiding voltage drops. Level 4 or higher (50%) is advised. Test for a few days using software and games. If everything holds, it’s stable.
I currently have my LLC at Level 2. My Mobo supports only up to LLC level 4. I’ve run several game benchmarks without issues and plan to try 1.275 with LLC level 4 to check stability.