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Complete Overclocking Guide: Sandy Bridge & Ivy Bridge | *ASRock Edition* - Page 335

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post #3341 of 9531
Used this guide as a reference for my OC. 4.5ghz stable 1.25 vcore with temps around 80°C, which is around 50 above ambient. I'm quite surprised how easy it was to get to 4.5. However anything above that needed a lot more voltage and I decided 4.5 is enough for now.

But I have one problem. My cpu idles at 4.5ghz now matter what. Only way I can force is to change the power plan to 'power saver'. On balanced its max speed all the way. I tried using the 2 C states listed in the guide, the offset mode gives me max speed and the idle modes BSODs me. Anybody got ideas?
post #3342 of 9531
Quote:
Originally Posted by Type-R View Post

the idle vcore is 0.960~0.952

Take some screen shots of your bios by formatting a flash drive in FAT32, rebooting into bios and hitting F12. That way we can all see you settings.

Your 2500k is very similar to mine where a -0.020 gives me the same 0.960 idle but combined w/ a +0.008 turbo would give me around 1.272 or 1.28 IIRC.

The 1.35v full load is seen in CPU-z?
Edited by Lucky 23 - 2/15/13 at 10:17am
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post #3343 of 9531
Yes the 1.35v is full load using prime95 and CPU-Z

Here some pictures.




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post #3344 of 9531
Well your settings look good but you want to try and bring down your full load vcore to see if it can still run stable at 4.5ghz. But in doing this your idle vcore will decrease also so you will want to pay close attention to this in CPU-z.

Since you want to decrease you full load voltage you can try setting your turbo at a +0.004 or put it auto and overclock using offset only since you really dont need any extra vcore at full load. Then try a -0.025 or a negative -0.030v offset and post your idle & full load voltages here.
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post #3345 of 9531
Quote:
Originally Posted by teeheetummytums View Post

Used this guide as a reference for my OC. 4.5ghz stable 1.25 vcore with temps around 80°C, which is around 50 above ambient. I'm quite surprised how easy it was to get to 4.5. However anything above that needed a lot more voltage and I decided 4.5 is enough for now.

But I have one problem. My cpu idles at 4.5ghz now matter what. Only way I can force is to change the power plan to 'power saver'. On balanced its max speed all the way. I tried using the 2 C states listed in the guide, the offset mode gives me max speed and the idle modes BSODs me. Anybody got ideas?

What exactly do you mean by that second to last sentence? Idle modes? Is your idle vcore too low?

Can you post bios screenshots? (Usb stick, fat32, postbto bios, F12)

IF its not a bios issue, customize the Balanced plan by setting min and max cpu power to what you want. But i have my power plan at 100% for both and it idles at 1600.
Edited by Jpmboy - 2/15/13 at 11:41am
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post #3346 of 9531
Quote:
Originally Posted by Lucky 23 View Post

Well your settings look good but you want to try and bring down your full load vcore to see if it can still run stable at 4.5ghz. But in doing this your idle vcore will decrease also so you will want to pay close attention to this in CPU-z.

Since you want to decrease you full load voltage you can try setting your turbo at a +0.004 or put it auto and overclock using offset only since you really dont need any extra vcore at full load. Then try a -0.025 or a negative -0.030v offset and post your idle & full load voltages here.

Ok now with turbo in Auto and offset -0.25.

core voltage (idle): 0.952
core voltage (full load): 1.344~1.352
VID (idle): 0.9957
VID (full load): 1.4011~1.4061

No Fail after 5 min in prime95.
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post #3347 of 9531
Quote:
Originally Posted by Type-R View Post

Ok now with turbo in Auto and offset -0.25.

core voltage (idle): 0.952
core voltage (full load): 1.344~1.352
VID (idle): 0.9957
VID (full load): 1.4011~1.4061

No Fail after 5 min in prime95.

Wow ok well i would say here are you options. You can keep going for a 45 multi and keep dropping the offset to a -0.030, -0.035 etc... but not sure how low you can go until your idle vcore becomes unstable. One member had his 2500k at 4.0ghz w/ a idle of .910 IIRC.

Another option you can try since you got such a low idle vcore and high full load vcore is leave your settings where they are at w/ the -0.025 and just change the multi to a 46. Now run P95 and see if it how long it last before a worker fails.

Unless you have a bad chip then the CPU is getting overvolted at full load for a 45 multi, since it should run stable at a lot lower vcore. But switching to 4.6 will help eat up that extra vcore at full load w/out changing your offset too much...biggrin.gif

You can at least try it and you might get an extra 100mhz w/out too much work
Edited by Lucky 23 - 2/15/13 at 12:13pm
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post #3348 of 9531
Quote:
Originally Posted by Jpmboy View Post

What exactly do you mean by that second to last sentence? Idle modes? Is your idle vcore too low?

Can you post bios screenshots? (Usb stick, fat32, postbto bios, F12)

IF its not a bios issue, customize the Balanced plan by setting min and max cpu power to what you want. But i have my power plan at 100% for both and it idles at 1600.

Whoops, I mean there are 2 configuration of C states listed in the guide, the one named 'idle mode' BSODed me.
Anyway the minimum processor state of my power plan is set to 5%, which is the default. I have tried to change all the settings of the 'balanced' plan to the exact same ones from the 'power saving' but it doesn't do anything.

Here are the shots of my BIOS. I realised I left my usb drive some where so camera pictures will have to do.


post #3349 of 9531
Okay teehee, thanks. First - why is cpu PLL raised vs stock (and. Not lowered?). Also, try setting package C to Auto although i'm not hopeful it will solve your problem.

Only other aspect you can try is to correct the short and long duration power limits settings so they are like the tutorial - if it helps, i do not know why.

Ther were a few posters some pages back that wrestled with the same problem, but i do not recall if there was a solution. But first, at least match the tutorial settings and lets see what happens.

What are your idle and load vcore values again?
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2 GTX Titan X Pascal GSkill 3200c14 TZs 8x8GB @ 3400c13 Intel 750 NVMe 400GB 2x Plextor SSD 256 Raid 0 (Win 7) 
Hard DriveOptical DriveCoolingCooling
Samsung NVMe 950 Pro M.2 Plextor 810 Aquacomputer GiGant 1680 (4x420) external Rad XSPC RX360 
CoolingCoolingCoolingOS
Koolance 380i Laing DDC-1T (2) Koolance EXC-800 Chiller Windows 10 x64  
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post #3350 of 9531
Quote:
Originally Posted by Lucky 23 View Post

Wow ok well i would say here are you options. You can keep going for a 45 multi and keep dropping the offset to a -0.030, -0.035 etc... but not sure how low you can go until your idle vcore becomes unstable. One member had his 2500k at 4.0ghz w/ a idle of .910 IIRC.

Another option you can try since you got such a low idle vcore and high full load vcore is leave your settings where they are at w/ the -0.025 and just change the multi to a 46. Now run P95 and see if it how long it last before a worker fails.

Unless you have a bad chip then the CPU is getting overvolted at full load for a 45 multi, since it should run stable at a lot lower vcore. But switching to 4.6 will help eat up that extra vcore at full load w/out changing your offset too much...biggrin.gif

You can at least try it and you might get an extra 100mhz w/out too much work

I made a test with -0.30 and -0.35 offset, with -0.35 offset before 5 min in P95 the OC Fail. with -0.30 offset the Core voltage is 1.344~1.336

I already tried to set the multi to 4.6 but the OC fail.

the cores temp is always below of 63 degrees.

Right now I set all defaults (stock speed) , the core voltage is 1.232
Edited by Type-R - 2/15/13 at 12:45pm
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