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I5 750 4ghz overclock Biostar XE CFX-SLI

Last response: in Overclocking
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April 4, 2010 10:20:49 PM

I've been playing around with my new i5 750 lately. Thought I would share my overclocking results with this motherboard as I haven't seen any others.
VID: 1.142

i5 750: 4ghz(20x200)
Biostar XE CFX-SLI

Bios
Vcore: 1.34, under load in windows: 1.3
vtt: 1.27
pll: 1.85

I've already tried lowering the vcore and the vtt and my chip doesn't like either one going down any further for 4ghz stable.
I've had it up to 4.52ghz at 1.4-1.44. Didn't bother trying to get it prime stable :p 

Btw the temps were during the middle of a hot day and the air conditioning isn't turned on yet in my apartment.

Suggestions/comments welcome.

http://valid.canardpc.com/show_oc.php?id=1117209



a b K Overclocking
April 5, 2010 12:34:24 AM

In some ways an overclock doesn't mean anything until it is proven prime95 stable. I think 4.5GHz is better than average, and if you can get it prime95 stable at 4GHz then you are doing pretty good.

I've built 3 of them recently using Gigabyte motherboards and could not get any of them stable during longterm prime95 testing at over 3.8-3.9GHz. However I'm not an expert with these chips and didn't spend any time experimenting with voltages. The i5 is a fast chip and running at 3.5 was plenty good for our cad operators.
April 5, 2010 1:05:25 AM

cadder said:
In some ways an overclock doesn't mean anything until it is proven prime95 stable. I think 4.5GHz is better than average, and if you can get it prime95 stable at 4GHz then you are doing pretty good.

I've built 3 of them recently using Gigabyte motherboards and could not get any of them stable during longterm prime95 testing at over 3.8-3.9GHz. However I'm not an expert with these chips and didn't spend any time experimenting with voltages. The i5 is a fast chip and running at 3.5 was plenty good for our cad operators.


I built an i5 750 build last year for my brother with the Gigabyte p55m ud4p. I was able to get his up to 4.4ghz, but I never went up to 1.4v because he only has a CM hyper 212+ heatsink and his computer sits pretty close to a heater. I am a fan of gigabyte's boards because of the amount of copper they use, and their bios is really easy to use.
My biostar has a pretty big vdrop while the gigabyte had none and their is no option in the Biostar bios to enable LLC.

Ended up staying at 3.6ghz 24/7 for his setup.
Do you happen to remember any of the voltages you used?
!