i5 750 and Gigabyte UD5

Ryan111

Ryan111

Ryan111

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Plymouth, United Kingdom
Right, have just built my machine so it's time for the OC.
So far I have got to 3.2 prime stable for 1 hour, thats with 20x multi, 160FSB, 1.3v in bios, 1.248 in CPU-Z.

Tried bumping the FSB to 180 to hit 3.6 and it blue screened after 1 minute or so of prime, I upped the voltage to 1.325 and it still blue screen. I check memory settings and the voltage in there was 1.5v (rated at 1.65) but in the memory voltage page, 1.66 was in red. Tried it on 1.6v and still blue screened. This was with; 20x multi, 180FSB, 1.325v CPU, Ram was set to 8x so was running at 1440 (rated 1600) and it still blue screened. I dont want to put too much voltage through anything so any ideas?

Ryan
 
Am sat at 3.2 atm, going to prime it for a good 4 hours at least I think. Memory is runing at 1600 @ 1.5v

Temps on all 4 cores are ~54 degrees
 
Last edited:
Temps are idle @ ~30 degrees and load @ ~53 degrees

How much further should I push the vcore? I only want to hit 3.6, not too bothered about hitting 4.0
 
Have set all voltages to LLC except Vcore which I have set to 1.3v and memory which I have set to 1.6v. Am now running;
20x mulit
180 Base Clock
2:8 ratio > Ram running @ 1440mhz
Am prime stable for 10 mins so far, temps are ~60 degrees
 
3630mins.png


30 mins stable
 
Over an hour stable now. Is it worth the push from 3.6 to 4.0 or should I just leave it? Will only be used for gaming and general web browsing/office. No video editing or anything.
 
Ryan111 said:
Over an hour stable now. Is it worth the push from 3.6 to 4.0 or should I just leave it? Will only be used for gaming and general web browsing/office. No video editing or anything.
Click to expand...

If only for gaming/web browsing, I don't think there is any gain going to 4.0GHz, but if video encoding then yes, it would be worth it...
 
Think I might stick with this then. Seems to run fairly cool considering.

I am going to try and lower the vcore a bit, try and get temps down a few degrees.
 
up to 3.8 is a good speed on a i7 depending on your chip. My can do 3.8 on stock volts the 200mhz extra need 1.3vcore prov not worth in the real world but you have your e-peen to think about on 4ghz:p
 
I know 4.0 is definately achievable given the tempreature and voltage headroom I have but I dont know if it is worth the extra heat and power consumption in the long run if all I do is game and general office/web browsing.

Can I enable speedstep, atm my CPU is constantly running @ 3.6 even when Idle (trying to think of power here) or will speedstep cause instability?
 
I have the exact spec as you and run mine at 3.6ghz with speedstep etc enabled. heres my settings:
Multi: x20
QPI Ratio: Auto (or set at 32 manually)
BLCK : 180
XMP: Enabled
LLC : Auto
Vcore: Stock VID of chip, which I think was 1.265 or so
VTT: 1.16
PCH/CPU PLL : Both auto
DRAM Voltage: 1.6

Tried for 4.0Ghz but couldnt get it stable and frankly didnt think it was worth the effort, plus I like having speedstep on. Had it at 3.8 for a while too but it was kinda unstable ingame.
Hope that helps.
 
We do indeed have very similar set-ups! Will have another look at volts etc and try and lower them tonight, gonna leave it as it is atm and prime it for 8 hours to check its fully stable. Been going 2 1/2 so far :)
 
Yeah good idea. I found were it was stable and then lowered the voltage one step and primed each time to check it was stable, then when it wasnt just upped it back one notch...which brough me back to the stock vcore :D.

All that work lol...
 
Dropped to 1.275 in bios, 1.232 in CPU-Z. 10 mins prime stable so far and temps about 5 degrees cooler all round :D
 
Dropped to 1.2625 in bios, booted into windows and started prime fine. Will test for 1 hour then probably drop vcore again.
 
How do I find out what the stock VID of my chip was?

Am booted into windows @ 1.2625 which shows as 1.216 in CPU-Z, im sure thats lower than it was stock?
 
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