i5 750 and Gigabyte UD5
- Thread starter Ryan111
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Core temp doesnt tell me either, am sat at 3.6 with 1.232 showing in CPU-Z, 1 hour 20 mins prime stable so far. Am quite happy with this so will probs prime this for 8 hours or so and keep this as my 24/7 for the time being 
Soldato
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- 11 Sep 2008
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tighten my g.skill's up they good for it 
Depending which Ripjaws you have CL7/8/9, run them @ their default timings (found on the actual stick of ram or packaging), set manually in BIOS...
What BIOS are you using on your UD5?
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Soldato
- Joined
- 11 Sep 2008
- Posts
- 3,322
- Location
- Co. Durham
Cant be 100% but im pretty sure i ran them on std volts up to 1750mhz stable cas 8 if that helps you
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I upped the CPU voltage 1 notch to 1.275v (in bios) which reports as 1.232v in CPU-Z and upped the RAM voltage to 1.64v. Still being reported as unstable in IBT but am running Prime 95 atm and its been stable for about half hour.
I have an i5 750 on a UD5 with a H50 cooler too! Have Corsair XMS3 Ram though which has a 1600MHz @ 1.65V extreme profile with 9 9 9 24 timing.
I like to make my hardware work for its living
. Running at 4GHz 24-7 - no turbo boost or speedstep which I find just adds instability for no real benefit. Settings are 20x200 with qpi ratio on 36. Mem multiplier on 8 so runs at 1600. I disable the extreme memory profile but just set it up manually.
My chip evidently isn't the best one to ever come off the production line so i need some fair volts to achieve this. 1.375 is the setting in bios, but bios and cpuz both report 1.36 at idle. Need the qpi/vtt on 1.3 which I've since discovered is naughty even though it's allowed on the almost identical i7. Mem is 1.66 as there is no option for 1.65, but bios reports it as 1.648. This is rated volts for the XMP so who cares if it's 'red' - it is set to his automatically if you enable the XMP in bios. Have tweaked the other two voltages (forget which is which off the top of my head) slghtly - 1.050 => 1.100, and 1.8 => 1.9.
Found LLC is best on level 2 for me. It may be related to a slightly less than brilliant PSU, but I find I get big droop under load if it's on auto or level 1. That means I need a huge Vcore setting in bios/idle so that when it droops under load there is still enough volts for stability. Level 2 on the other hand compensates strongly for droop - in fact to much so Vcore rises slightly under load. This is how it should be though to be honest - lower Vcore in bios/idle that rises slightly when load demands it.
This is all kept under control nicely by the H50 which idles 30-35 in a warm summer room or down around 30 in a cooler room. Load temps are 70-ish priming, and just hitting 80 during IBT, so nothing to worry about really.
Good luck.
I like to make my hardware work for its living
. Running at 4GHz 24-7 - no turbo boost or speedstep which I find just adds instability for no real benefit. Settings are 20x200 with qpi ratio on 36. Mem multiplier on 8 so runs at 1600. I disable the extreme memory profile but just set it up manually.My chip evidently isn't the best one to ever come off the production line so i need some fair volts to achieve this. 1.375 is the setting in bios, but bios and cpuz both report 1.36 at idle. Need the qpi/vtt on 1.3 which I've since discovered is naughty even though it's allowed on the almost identical i7. Mem is 1.66 as there is no option for 1.65, but bios reports it as 1.648. This is rated volts for the XMP so who cares if it's 'red' - it is set to his automatically if you enable the XMP in bios. Have tweaked the other two voltages (forget which is which off the top of my head) slghtly - 1.050 => 1.100, and 1.8 => 1.9.
Found LLC is best on level 2 for me. It may be related to a slightly less than brilliant PSU, but I find I get big droop under load if it's on auto or level 1. That means I need a huge Vcore setting in bios/idle so that when it droops under load there is still enough volts for stability. Level 2 on the other hand compensates strongly for droop - in fact to much so Vcore rises slightly under load. This is how it should be though to be honest - lower Vcore in bios/idle that rises slightly when load demands it.
This is all kept under control nicely by the H50 which idles 30-35 in a warm summer room or down around 30 in a cooler room. Load temps are 70-ish priming, and just hitting 80 during IBT, so nothing to worry about really.
Good luck.
Glad to see my Zalma Ultra quiet air cooler doing well against a water cooler.
Peaks at 63C on hottest core on lowest fan setting and with fan up full cores are between 54-59
. With 1.268 volts in bios