e5200 + P45 voltages

[xiphrex]

Hi,

Im overclocking an e5200 on a Gigbayte P45-DS3.

Im used to overclocking on older boards that dont have so many bios options.

Ive been trying to read up on GTL reference voltages, CPU Termination voltage and all that stuff, but I still dont really know what Im doing. I dont know whats safe and whats not safe.

Does anyone have any specific tips or recommendations for this particular motherboard and/or cpu? Or any links to specific guides?

I hope there is a way to calculate what sort of voltages I need rather than trial and error way or doing it as there are so many different voltages its going to be quite hard. Ive read GTL is very important for stability but that is a completely new area to me.

At the moment I have found stability at these settings but I would like to push for more and optimise the other voltages and reduce that vcore (the figures on the left are the default, the ones in the brackets are what Ive set them to):

12.5x multiplier
300 FSB

Motherboard Voltage Control
CPU
CPU Vcore --------------- 1.1750V ---- : [1.4000V]
CPU Termination --------- 1.200V ----- : [1.200V]
CPU PLL ----------------- 1.500V ----- : [1.500V]
CPU Reference ----------- 0.760V* ----- : [Auto]

MCH/ICH
MCH Core ---------------- 1.100V ------- : [1.200V]
MCH Reference ----------- 0.760V ------- : [Auto]
MCH/DRAM Ref ------------ 0.900V ------ : [Auto]
ICH I/O ----------------- 1.500V ------- : [1.500V]

DRAM
DRAM Voltage ------------ 1.800V ------- : [2.020V]
DRAM Termination -------- 0.900V ------- : [Auto]
Channel A Reference ----- 0.900V ------- : [Auto]
Channel B Reference ----- 0.900V ------- : [Auto]

Thanks in advance,

 

[Justintime]

Tbh on a p45 i'd only touch the cpu and memory vcore up to around 400fsb and even more, especially with only a dual core cpu.

 

[xiphrex]

Tbh on a p45 i'd only touch the cpu and memory vcore up to around 400fsb and even more, especially with only a dual core cpu.

I would be delighted if that would work, perhaps with a lower multi it would, but at the max 12.5 that the cpu can do there is no way to even reach 300 fsb without increasing vcore.

If I put the CPU Termination voltage (VTT) to 1.3 is that detrimental? What does it do?

 

[El Jimben]

1.3v is perfectly fine and 1.4v is probably the max that I'd suggest. You MCH looks a little low so I'd definitely suggesting upping that a notch or two. For reference, these were my setting for 3.8GHz with my E8200 & my current board:

476 x 8
Vcore: 1.33v BIOS. 1.3v load
MCH: 1.29v
VTT: 1.20v
ICH I/O: 1.5V
GTL Ref: 67%