- 4 months ago
So I'm new to overclocking but I'm not quite sure what is going wrong. I have an MSI MPG Gaming Edge Z390M Micro ATX board, i7-9700k, Corsair RMx 650, plenty of case air flow, and a Noctua NH-U12A cooler.
Currently my system will remain at 4.6GHz (the default all core turbo boost) no issue under Cinebench R20 and gaming. Under Prime 95, it will cycle between 4.4 and 4.6GHz accross the cores under small fft's. At that point temps are fluctuating between 75 and 80. All other tests including the blend Prime 95 test when the cores run consistently at 4.6, I'm only seeing temps around 55-60. So the way I see it, I have plenty of thermal headroom.
My first concern is when I run Cinebench R20 in single core mode. I'm not seeing any single core reach above 4.6GHz though and to my understanding single core turbo boost on the 9700k is 4.9GHz.
So next I've tried my hand at overclocking. I've tried setting my own turbo values. I've tried all core overclocking. I've tried fixed and dynamic with speed step on and off. I've disabled c-states. I've adjusted the CPU Overtemp Protection. I've tried with both XMP disabled and enabled including the "MSI XMP Boost" on and off (the difference there is the bus speed with MSI XMP Boost when I enable XMP is it changes from 100.00 to 100.80 MHz). I've tried voltage auto, offset, adaptive, adaptive with setting to 1.36 volts, and override mode. I've tried with various ring speeds, various AVX offsets, etc. And in no test can I get the CPU to run at the speed I set it for.
I don't know if this is because of my BIOS firmware. I'm on the lastest v16. It came with v15 and I flashed it before even installing windows. I don't know if that was my mistake. I don't know if it is a motherboard issue or power delivery (it does have an additional 4 pin for cpu power but to my understanding I shouldn't need that). I've seen the CPU top out around 190W according to HWMonitor under Small FFTs not overclocked.
My XMP RAM works just fine, only tweaking I've done of that is changing the Command Rate from 2 to 1. My GPU overclocks just fine. It's just my CPU is a jerk it seems. So I'm not getting full turbo boosts even with plenty of thermal headroom under less than 8 core uses. And when I set the multipler to 50 (with all the various tweaks mentioned above) my CPU still downclocks to 4.7GHz in Cinebench R20 and actually gets worse in Prime 95 going to 4.2-4.5GHz. I don't understand what's going on. Temps are 60 or less during all of this. I'm annoyed because I'm not even getting default boosts let alone able to even overclock. Did I lose the silicon lottery that bad or is there something I'm doing wrong? I'm confused because my friend with a 9900K on a Gigabyte Auros board set his multiplier to 50 and was done. I don't have stability issues it seems, it just won't maintain the clocks I want. When I boot Windows, it does show the system reaching 5GHz.
I'm hoping someone can help me figure out if I'm doing something wrong or if something of mine is defective or I'm just really unlucky.