help with overclock i5 750 and memory

[eraser2002]

Hi all, please can anyone offer any advice on my overclock please and if this is OK what ive done

I have a gigabyte P55-UD5 latest bios, running a core i5 750 and 8gb gskill ripjaw 1600mhz 7-8-7-24 ram, and a sapphire 5970 and coolermaster 932 case.. corsair h50 cooler

I currently set the bios settings:

Cpu ratio 21 * 190… I cannot get the board to boot at 200 and have to leave turbo boost enabled to get the 21 to be available
Cpu thermal monitor enabled
Disabled C1E and c3/C6/C7 settings
XMP disabled
Memory multi 8* to give 1520mhz
Pci exp 100mhz
Cpu clock drive and pci express clock drive 900mV
Memory performance enhance = standard
Set quick settings for memory and changed to 8-8-8-24

Voltages
1.4v for chip
qpi/vtt = 1.34
pch core = 1.1v
cpu pll = 1.9v
dram 1.64v

The machine is stable and does 1m PI in 10.499 seconds, the corsair h50 is superb and after 2 hrs prime its 61degrees max

I thought I would be able to overclock the memory a bit but the next multi is 10 * and if I change it to that the board wont boot. If I enabled xmp the board wont boot. I wonder if its because I have 4 sticks?
rather bizarrely if i change to 7-7-7-24 its a slight bit slower than 8-8-8-24

Thanks for any advice

Chris

 

[Liampope]

Strange - my UD5 has no problem with 200x20. What's your QPI ratio? I'm forcing 32 rather than 36 (but dont realy know what it means). Surprised you're only at 61 degrees running prime with 1.4V - i'm running around 70 also with a H50 and 'only' 1.375V. What prime test you running an what you using to monitor temps, out of interest? What level of load line calibration?

I'm perfectly stable for 1 hour in prime so happy enough, but would love to understand what the hell all the settings mean (other than the FSB, multipliers and vcores which is all I had to play with last time I did an overclock) . Still learning and might try to get my volts lower.

 

[eraser2002]

Hi Liam,

My QPI ratio is 36 i dont know if to change that or not... im using coretemp64 for the temp monitoring and prime95.. im running the test again to make sure i used the correct one for the most heat

 

[eraser2002]

sorry also the load line calibration is on 'auto'