Finally time to overclock i7 920[Help please]

21x multi on my setup was a lot easier than 20x, vcore required for 21x193 was 1.2750, dropped the multi to 20x as i wanted my ram at 1600mhz, needed 1.300 vcore, and 1.3125v on qpi.
 
you need to make sure your dram frequency isn't limiting your overclock aswell....check in your bios that when you set your multi and bclk that your new dram frequency does exceed your ram limits.....my ram is corsair dominator gt.....its rated at 2000mhz but because its good stuff it will go to 2100mhz but it wont go any higher
 
Thanks for the advice guys I will get bashing on tonight/tomorrow. Well it was stable for 6hours at 170 bclk at 1.35 volts. Ye I have set my ram multiplier to 6 so my memory is running well below its rated speed as I test my overclock. The ram is 1600mhz stuff but running at around 1080mhz. Unless reseating my cooler helps or I get some better fans for my H-50 I am at my current max voltage as I have no-more headroom at 90c!

I accidently closed the temp aps when I came back but max was 92c within that 6 hours. http://imageshack.us/photo/my-images/30/clock17013516612591c6hs.jpg/
 
Lighters said:
Thanks for the advice guys I will get bashing on tonight/tomorrow. Well it was stable for 6hours at 170 bclk at 1.35 volts. Ye I have set my ram multiplier to 6 so my memory is running well below its rated speed as I test my overclock. The ram is 1600mhz stuff but running at around 1080mhz. Unless reseating my cooler helps or I get some better fans for my H-50 I am at my current max voltage as I have no-more headroom at 90c!

I accidently closed the temp aps when I came back but max was 92c within that 6 hours. http://imageshack.us/photo/my-images/30/clock17013516612591c6hs.jpg/
Click to expand...

the ram will need to be around its rated spec as well and 1060 MHz aint in the ball park, this wont help stability look under dram frequency in the bios and set it to nearer the rating there will be choices that you just need to choose with the keyboard e.g at 1060 MHz there may be another below it that says 1310 MHz then 1540 MHz....you would choose 1540 MHz but again beware that when you change bclk you change memory frequency as well so at 1540 MHz if you up the bclk then 1540 may go up to 1580 MHz (if you go over your rated ram spec and your memory cant handle it just wont post) my memory at 2100 MHz wouldn't let my chip go over 4 GHz so I took it back a notch and pushed the chip to 4.2 GHz , don't need to test for 6 hours either, give it 15 - 20 mins cause if its going to go it will be in that period mostly :) if it doesn't and you find it freezing sometimes then take it back a notch but don't waste 6 hours of your life waiting for it to fail, good fans will help temps for sure,
 
also don't need to touch your ram multi just change it in dram frequency like I said in above post...make sure your clear cmos so you can start on a fresh page and not have to try and remember what you changed and what you didn't.....
 
Well its been stable for 2 hours at 3.6ghz so far at 1.35vcore! The only way I can change my ram is via the mutliplier that is multiplied by the fsb. It was on around 8 but I changed it to 6. Think there are increments of 2 but theres plenty of variation so I can get it at 1600mhz so thanks for that. Cheers for the time saver info :)

Off out for freshers tonight so will keep experimenting tomorrow!
 
Ok I tried making my system more stable and set the ram at 1600mhz exactly at its rated speed and it refuses to post. The ram is 1600mhz and the XMP settings even set the ram voltage to max 1.66 and uncore volt to 1.25 so they are more than enough volts for "stock" I even tried it on manual and my ram doesnt like running anywhere near 1600mhz. Patriot offer a lifetime warranty. Surely this comes under warranty if it wont run at rated speed on max safe voltage correct?
 
are you trying to use the xmp settings?
if so don't mate, I find them rubbish......read back the posts and do it the way people have said, these methods are tried and tested :)
your patriot ram will run at 1600 MHz but xmp will be pushing it to hard on the timings most likely causing it to freeze
 
No I tried the XMP settings and they didnt work so I set the ram up manually according to the specification they were designed to run at. This even meant going back to stock and had to further reduce my BCLK to 133 to get it at exactly 1600mhz and 1.66v ram and it still failed to post. The timing are 8-8-8-24 which is exactly what is was designed to run at.

The ram is 6GB Patriot Viper DDR3 PC3-12800 1600MHz CL8

I have re-read the posts above but putting my multi on 19 forces it to 21 when I have turbo enabled and off the reading apparently its the better way to get an overclock. I also have a feeling my mobo doesnt like very high BCLK.

I still have no idea what the QPI Data rate does and see it go from 4.8gt > 6.0 gt is worrying! Same applies with the IOH voltage which is on stock at 1.1. Then theres the uncore voltage which is at 1.125 but people have way higher voltages than me but I dont want to fry anything. Bios says my IOH temp is 42c

Stressed the screen for 2 hours at http://imageshack.us/photo/my-images/191/clock17012516612576c30m.jpg/ as I was unable to boot up with 175+ blck either due to mobo not liking high bclk or ram is crap
 
I tried the exact settings you said.
19 x 180 @3.4ghz 1.25voltage
9-9-9-27 ram timings at 1081 mhz 1.66v
Then tried ram at multi of 8 at around 1400mhz and it also refused to post

The computer refusd to boot. It has been running at 3.6 ghz for 2 hours at that exact same vcore and higher multi so it looks like my motherboard doesnt like a high BCLK and also seems to me that my ram is terrible.
 
it does appear that your ram is a bit crap...

19 x 180 @3.4ghz 1.25voltage
9-9-9-27 ram timings at 1081 mhz 1.66v

did you try upping the bclk to 185 on this setting which would push your ram into the 1100 MHz ranges but still on x9? if it wont post try then upping the vcore to 1.3 then 1.35...if it does post try 190 bclk
 
This is getting really frustrating now :'( For example my clock at 3.5/6 would be stable at 170fsb yet when I tried your earlier settings and went back it fails to boot properly sometimes. It stress tested fine for 6 hours so I dont know whats causing the instability.

I tried your following settings:
19 x 185 @3.5ghz
9-9-9-27 1100mhz ram it has posted fine so far :S

Edit - like now I am upto 19 x 195 @ 3.7ghz for 1min stable.
I am going up in increments of 5 at 1.25vcore
 
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It just failed to post:
19 x 200 @ 3.8ghz 1.25vcore
1200mhz ram

also failed to post at 1.3vcore and 1.35vcore. What now?

also quite worried that my QPI is getting high at like 7.x gt from 4gt
 
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try it at 1.4 vcore but watch the temps

don't worry about qpi

starting to make some headway but I think your ram is holding you back any further...give it a try and let us know lighters :)
 
1.4vcore boots into windows but it fails prime instantly and workers stop working, I am afraid of the temps also as I last recalled 1.38v had my temps near 95c!

So what now?

Edit - also refused to post when I restarted to set the BCLK back down to 195 :'(
 
have a play with it on the 21 multi, using the same Technic see what you get mate

if not with your set up you may have to settle for 3.6 GHz unless you want to start spending money....

see how you get on with the 21 multi?
 
Will have a play around, should I keep the vcore on 1.4 as my max temp reaches 96c on 1 of my cores or lower it back down to 1.25?

Now trying 20 multi at 3.7ghz and then going to try 21!
 
I have the antec 900 standard fans on full and the H-50 corsair cooler with their stock fan doing a push/pull config. Seems really hot and my highest core atm is 96c while coolest is 86c but I havent a clue how to lap or even if its worth it! Think a re-seat is in order? fairly sure I had a good application of thermalpaste though :'( it is a c0 remember!

Also to get a 21multi I need to re-enable turbo mode. Not sure how that might affect some things :/
 
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