Overclocking Help - Computer Won't POST

[Wingo101]

Hi Guys,

I'm having some problems overlocking my pc:

If I raise the BCLK above 145(145*20) the pc doesn't post anymore.

I have tried the following settings aswell:

CPU Voltage: 1.40v
PLL Voltage: 1.88v
QPI/DRAM Core voltage: 1.35v
DRAM Bus Voltage: 1.64v

I also tried messing with the RAM timings (Changed from auto to 8/8/8/24)

Am i missing anything?

 

[Tatty_Two]

You don't need 1.88v Pll for those clocks, drop them to 1.6-17v, I would also lower your QPi volts a little, then lower your memory multiplier down low to eradicte memory as a deciding factor and leave on auto timings for the moment..... just give that a go and report back.

Edit: When i said lower, I meant from what you have tried, not the screenies, I would set QPI volts at say 1.35v to start with, and 1.35v for the CPU should be more than enuff for a 150 BClk

 

[Tatty_Two]

What's your uncore multi?

 

[Wingo101]

Thanks man, it appears my uncore multiplier was set too high....

Anyway, i managed to get my system to a stable 4Ghz Using the following settings:

Vcore: 1.2375v
QPI/DRAM: 1.2375v
DRAM Bus Voltage: 1.64v
CPU PLL: 1.84

The temperature is reaching a max of 68c on PRIME95. Not bad with an ambient temperature of about 30c

 

[brandonwh64]

I was about to say to raise the CPU multi up to 21x and do a 190 BCLK. i leave my PLL multi on auto

 

[Tatty_Two]

looking good there, and not a bad guess on the Uncore multi!