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2500K Overclocking Mutliplier Questions

Lotheron

Lotheron

Platinum Member
I've read and searched and read some more, but I've not seen my issue in any guide/forum post exactly unless I'm missing something. So here goes a newb question.

Anyway the new system is a 2500K D2 Stepping/ASRock Extreme 3 Gen 3/Corsair A50 Cooler.

Multiplier: 45
Everything else Auto at the moment. (voltages, PLL, etc)

Issue:

Under Prime95 load, the multiplier decreases to about 40-42 and then shoots back up to 45 after the load is finished. In games, it stays 45. The system is 100% stable. I played BFBC2 for about an hour and it stayed at 4.5Ghz, but it wasn't a 100% load of course.

I'm assuming this is a CPU thermal protection feature, but my temperatures say about 63C under load and 33C idle.

Voltages: Coretemp maxes out at 1.35v unloader load, CPU-Z reports 1.256 under load. HWiNFO64 matches coretemp and the ASRock utility matches CPU-Z.

The voltage is currently on auto, but I've set it as high as 1.4v on manual with the same exact results. And I never saw the VID/Vcc go as high as 1.4, only 1.375 when it was set as such.

My question, is there any way I can get it to stick at 45 multipler under load, or is this just the processor's limits?
 
You need to increase the CPU current and power limits. Otherwise the CPU will down-clock under load to keep it within those limits.

I'm not familiar with ASRock boards, but the values you need to adjust will be called something like "CPU Current Limit" and "Turbo Power Limit." They usually default to around 95 to 98. You need to increase them. Values around 140 to 150 are probably a good starting point, but someone else with experience with ASRock boards my be able to give you better advice.
 
MrTransistorm said:
You need to increase the CPU current and power limits. Otherwise the CPU will down-clock under load to keep it within those limits.

I'm not familiar with ASRock boards, but the values you need to adjust will be called something like "CPU Current Limit" and "Turbo Power Limit." They usually default to around 95 to 98. You need to increase them. Values around 140 to 150 are probably a good starting point, but someone else with experience with ASRock boards my be able to give you better advice.
Click to expand...

I'll look for those settings and try now.

The UEFI bios settings are identical to ASUS i believe, since they're from the same manufacturer.
 
Ok, i've tried everything.. When I manually set the multiplier, it will reduce it.

On the other hand, I wish I knew what the board was doing in it's turbo mode. At turbo 4.6 the board is stable but it gets to 81C in prime95. I'm not sure that's such a good idea to keep it that way. The turbo modes are every 200Mhz, so the other one is 4.4Ghz. I'd like to stay at 4.5Ghz but keep the multies that way.
 
Finally got it I think.

4.5Ghz Stable.. 66c.

Although which Vcc should I trust.. CPUz or CoreTemp?

at 4.5Ghz Prime95 load
CPU-Z= 1.25V
CoreTemp = 1.36VID
 
I think I'm going to stop where I"m at.. my temps are exactly where I want them. I think this is the limit that the A50 can handle. With a better air cooler and/or water, I'm sure this processor could hit higher speeds.

4.6Ghz @ 1.280-1.288v, ~69c.


Thanks for your help, you pointed me in the exact direction I needed!

Edit: wasn't as stable as I'd hoped. Went back to 4.5Ghz, much more stable.
 
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