4790k Won't OC or even turbo.
4790k Won't OC or even turbo.
Hello All!
I had originally gotten a 4790k because the ability to overclock was appealing. My intention was to eventually OC when my CPU started aging. The CPU is amazing and I haven't noticed any problems with it. However, when I was monitoring temps the other day I noticed something. My CPU only goes to 3499mhz, not even the 4ghz a 4790 goes to, and certainly not the 4.4ghz the K is supposed to turbo to.
I have reset BIOs, I have the latest bios version, and I know it's not throttling. When I look in CPU-Z it says my multipler ratio goes from 8-44, but the clock speed will never go above 3499mhz even under load. Any ideas?
4790k
z97x-sli
Be-Quiet! Dark Rock 3 (Non-Pro)
28gb ddr3
Initially, it might seem a simple question, but you're verifying the speed during the benchmark? Otherwise, confirm your Windows Power Plan settings, consider switching to the Ultra/High Performance option and observe the results.
In general, if all Windows power settings are left at the default and your BIOS is also in its standard state (multiplier not restricted), it's normal for the CPU to slow down under heavy use with all cores active. Check what occurs when you run a benchmark using just one core. I'm sure Cinebench includes a "single processor" option or test. If your cooling system is sufficient, it should perform near its highest possible speed during this single-core test.
I checked my BIOS and discovered my single core turbo settings. They were 44x, 44x, 43x, 42x across cores 1 through 4. I adjusted all to 44x. During cinebench, my multi-core performance was 697cb and single-core was 143cb. In CPU-Z, the clock readings remained consistently low at 3499mhz for both tests. These results seem consistent.
Yes, this was during my monitoring session. My average frequencies were around 800-1600mhz when idle and 3499mhz under load. Based on your advice, I adjusted the settings to "Performance." Now my idle is at 4400mhz. CineBench Scores have improved significantly, particularly for single core. Under multi-core load, my CPU sits at 4ghz, and at single core it's 4.4ghz. I might need to reset the BIOS multipliers to reach 44ghz in idle, but I’m content with the current results. (I’ll check again when I begin optimization.)