i5 2500k cant post @ 1.30v

teejay73 · 8 Jun 2011 at 20:45

Hi all, just this week I installed my new pc bits, which consisted of a new mobo, i5 2500k, xms3 ram and the eco coolit, the system is in my sig. well all installed ok and was concentrating mainly on installing win 7 64 and sorting out that so did not go for any overclock on the 2500k, I did however run 1 instance of prime blend just to check all was good @ stock and left it at that. below are what it is like on everything stock, all seems ok to me.

Anyway, today I decided to get some juice out of the 2500k and went straight to bios and cranked up to 1.30v on the core and thought I would just check temps at 1.30v without increasing the multiplier, so I saved the setting and re-booted the system and the thing wouldnt boot, the pc`s fans come on for about 15 secs and then shutdown, then it would turn on again on its own and same thing over and over, I tried clearing the cmos, by taking the battery out and clearing via the cmos jumper, all to no avail!

So I left the pc off whilst I had a bath and low and behold the thing fires up 1st time, which has left me confused that something in my system is not working as it should. I guess it is one of three things, the psu,mobo or cpu or could it be that I have a short somewhere?? anyone have anything similar to my issue? dont want to random rma!

Thanks in advance!

Awahwah · 8 Jun 2011 at 22:30

What bios revision are you using? Make sure its the latest - F4 if its a B3 board.

teejay73 · 8 Jun 2011 at 22:46

Awahwah said:
What bios revision are you using? Make sure its the latest - F4 if its a B3 board.

Just checked and it is f2 bios, would that make such a diff? Will update to f4 regardless.

Cheers

teejay73 · 9 Jun 2011 at 11:50

Right, it seems I have got my rig stable @ 4ghz after running IBT and prime blend for 8hrs + which is all good and have now updated bios to revision F4, temps are running at mid 50c`s under stress and about 29c-30c idle so all goood.

I now want to ramp it up a bit but cant seem to find out how to stop the vcore of the cpu fluctuating on it`s own? When I was running prime the v-core was showing at 1.351v, even though in bios I set it manually to 1.25v, what do I need to set in the gigabytes bios to make it stay at the voltage I want?

Also does anyone know if I can safely set my ram (Xms3 1600) at the xmp setting? everytime i set it in bios it sets itself to 1.65v, Is this a safe voltage for 2500k? I would rather set it at 1.5v, currently it is set at 1333mhz @1.53v.

Kind reagrds Teejay

munz · 9 Jun 2011 at 20:15

its normal to see v-core move abit under stress/idle but yeah 1.25-> 1.351 is pretty big jump, i assume you see 1.351V when its under 100% load and 1.25v at idle?

My current settings are [email protected] , xms3 ram at 1.5V asus p8p67m if that helps

teejay73 · 9 Jun 2011 at 20:31

munz said:
its normal to see v-core move abit under stress/idle but yeah 1.25-> 1.351 is pretty big jump, i assume you see 1.351V when its under 100% load and 1.25v at idle?

My current settings are [email protected] , xms3 ram at 1.5V asus p8p67m if that helps

Cheers for the reply Munz! Well tbh @ idle it is sitting around 1.057v and it seems that even though I switched it to manual control in bios to 1.25v, it has somehow got back to 1.351v in bios!?.

I dont know Gigabytes bios all too well as I have only used Asus boards before so am a bit stumped on what I need to do to resolve this. :confused:

I did however solve the memory issue and I am now running at 1600mhz @ 1.5v, so all is good on that front!