please help with this over clock i feel like an absolute noob :s

garyfl

garyfl

garyfl

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im trying to overclock my i7 950, notthing strenuous, just a 3.8ghz oc.

i have a hafx case and a h70 cooler.
my power supply is a modular 950 watt so that isnt the problem.

no matter what i do in the bios either it boots and the mem goes to 1200 mhz and the cpu goes down to 1300mhz and 15x multiplier or the pc dosent boot at all.

i dont really know what to do, ive tried changing the multiplier to 23 and blk to 149 and changing vcore and qpi to 1.3but just no luck it either dosent boot or it does what i said.

i have a gigabyte ud7. so i didnt think overclcoking would be such a problem.

if some one could kindly explain what to do and give me a rough tepmplate to go by in the bios for the ud7 for a moderate oc. so that my mem speeds dont go down and i dont bash it all up, i have to keep clearing cmos
 
try this

20 multi

200 bclk

1600mhz memory

type in the timings from the side of your modules

cpu vcore 1.35v
dram voltage 1.66v


leave everything else on default
then once you have that stable take the cpu vcore down byt two notches and test again.

if that is stable then rinse and repeat, taking it down in steps until you start getting crashes then put it up a notch.

your 950 will probably do 4.2ghz at 1.35v using a 21X200 combination if you want to take it further

hope this helps
 
the ud7 requires only the changes i listed above to get 4ghz/4.2 on a bloomfield

your 1866 memory is all well and good but you will need to use a lower base clock/higher multi if you want it running at rated speeds.

to do this you will need to put the memory divider up by one and take the base clcok down until it matches 1866, then up the multi until you have the clcok you want

the problem with 1866 memory is that you cant use the nice rounded figures.

for instance 200 bclk will provide you with the right memory dividers for 1600mhz and 2000mhz memory.

i used to have 1866 ocz reaper and ran it at 1600 because the difference was negligable.

in fact - running your 1866 memory at 1600 will mean you can probably get the timings a lot lower than they are rated to.

the ud7 wont need any other voltages changing than the ones i mentioned.


you could try the following

181 bclk
22 multi.

turbo mode disabled.

set memory to equal or less than rated speeds

same voltages i mentioned above
 
havin g none of it :S either get a bsod or it keeps boot looping until im forced to clear cmos, im really new to this so im not sure what im doing wrong tbh, ive done all the obve respecvtively but just does as ive mentioned. hmmmm crappy chip ? or something im missing ?
 
garyfl said:
havin g none of it :S either get a bsod or it keeps boot looping until im forced to clear cmos, im really new to this so im not sure what im doing wrong tbh, ive done all the obve respecvtively but just does as ive mentioned. hmmmm crappy chip ? or something im missing ?
Click to expand...

Try setting the QPI voltage to, say, 1.34v. See if that helps any.
 
Use the settings RJK gave you

20 multi

200 bclk

1600mhz memory

type in the timings from the side of your modules

cpu vcore 1.35v
dram voltage 1.66v
Click to expand...

but also check the following:

Loadline calibration: ENABLED
Set QPI multi to x36
Set uncore multi to x16

Set the memory to 'STANDARD' - not turbo.
Set your basic memory timings as they may be set on AUTO which means they may be too agressive.
 
right i shall try all this, going through all the settings mentioned with a fine tooth comb and applying then, will report back asap, probly in 5 mins lol after ive cleared cmos.
 
told you : | has absolutely nothing, it boots saying blah blah due to ocing, reverts back to old settings. im thinking its the voltages im not getting right, they seem to be such minute settings, is there an exact voltage i need to select, also what timings would i need to select for this 1866 ram and also, bear in mind im only aiming for 3.7-3.8 oc.

cheers
 
Can I recommend that you take a look at this guide:
http://images.tweaktown.com/imagebank/Core i7 920 oc 4G 2008.12.12_(ENG).pdf

The voltages will need to be a bit lower (as you have a D0 chip), so use the voltages that Rich has suggested.

Your uncore multi needs to be either 2x the memory multi or 2x+1 the multi.

For the RAM timings, use the suggested settings for now. Set the voltage for the RAM to 1.64V. CPU core to MAX 1.35V, and decrease when you can.

There is obviously something missing, if the OC reverts on boot. I found that to be the uncore multi being wrong (I made the mistake after reclocking after the summer).
 
nope bsod. ive got it at 3.42 gz atm with no voltage change. im ultimately sure its the votages im getting wrong and uncore and timing all the settings and blk and multiplier im okay with.
 
ive changed all voltages and blk and multi respective to above, on memory ive clicked no profile ive also clicked standard so no turbo etc. also chose llc level one. and uncore x38

honestly no idea whats wrong.
 
Okay. Lets try this bit-by-bit.

Reset everything to default, but switch off EIST, C1E and intel overdrive (if present) so that you are dealing with a consistent CPU clock that does not change. Keep all stock voltages and multipliers.

Next, download CPU-z and take a screenshot of the CPU and Memory tabs, so we can see all your settings and memory timings. Download intel burn test and core temp. Run the intel burn test using 8 threads, on "very high" stress level for, say, 3 or 4 cycles. Have core temp open while you do this, and make a note of the maximum temperature.

Then, start to up the BCLK by around 5Mhz at a time. Each time you can boot into windows, repeat the above (run intel burn test while observing temperatures). When you find the BCLK at which the test first fails, report back with a screenshot from CPU-z. Hopefully we can work forwards from there....
 
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