stable 4ghz from i7 920 d0 and ex58 ud5

AaronS said:
I dunno why everyone goes to 1.35v, you shouldn't need more than 1.3v on most 920's,
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The reason is that every single chip C0 or D0 is different somtimes in small ways and other times huge. Saying the most need xxx volts it pointless he could have poor chip as long as he stays in within what intel/he feels is safe hes fine temps permitting ofc.
 
BigBruiserAl said:
The reason is that every single chip C0 or D0 is different somtimes in small ways and other times huge. Saying the most need xxx volts it pointless he could have poor chip as long as he stays in within what intel/he feels is safe hes fine temps permitting ofc.
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I get that, but stability is due to other things, rather than forcing it on with vcore, also people just follow guides, like the beginners i7 overclocking guide online, which says to put it to around 1.385 to get 3.8, people have 3.8 on 1.2
 
AaronS said:
I get that, but stability is due to other things, rather than forcing it on with vcore, also people just follow guides, like the beginners i7 overclocking guide online, which says to put it to around 1.385 to get 3.8, people have 3.8 on 1.2
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Some people have good chips,cooling,cases ect. However your view of stability maybe different to theirs.
How many apps ect will stress you cpu/mem 100%?
I use linX with max mem 20 runs as a stability test however i think this is extreme overkill as i only do abit gaming, photo/video editing/encoding.
If your pc posts at low a vcore why not try running it for a few days/week and if it is stable leave it or try and reduce vcore.
 
the_electrician said:
Some people have good chips,cooling,cases ect. However your view of stability maybe different to theirs.
How many apps ect will stress you cpu/mem 100%?
I use linX with max mem 20 runs as a stability test however i think this is extreme overkill as i only do abit gaming, photo/video editing/encoding.
If your pc posts at low a vcore why not try running it for a few days/week and if it is stable leave it or try and reduce vcore.
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That is what I've done, and if I lower vcore.. unstable, it's at the minimum stable.. and has been thoroughly tested, yet I probably do the same amount as you, I would go farther but I gotta work out a better cooling system first.

My CPU does do 4GHz stable on prime at stock vcore, and stable on intel burn test +10mV with turbo off and ht on.... IF I raise the uncore, lowering the PLL has only improved things for me and some others that have tried it, I changed dram to 1.61 just to add a bit more power as the latencies are running lower than normal.

I know some peoples CPU needs more vcore.. but I think the majority of people JUST keep raising the vcore.. when even for their chips.. it doesn't need to be so high because it's things like the uncore and qpi, or even the dram or qpi link speeds.. or even the dram:qpi ratio
 
Anyway, this is where I would go from:

fsb - 200
multi - x20
HT - off
all C states - on
visualisation? Virtualisation.. doesn't matter on or off
Turbo - Disabled
Uncore - I'm not sure how these multipliers r even working :S but (3200)
qpi - x?(3200)
ram multi - 8(1600)
timings - all on auto for ram
voltages:
vcore - 1.275000 +~30mV
cpupll - 1.65
qpi - 1.35
dram - 1.64
 
Hi all, thanks for the suggestions I decided to try a little different approach so here are the settings I've been priming with for about 30 mins on a blend test

200fsb
20 multi
turbo/ht/c states and virtualisation off
qpi x36
uncore x19
ram all auto
ratio x6 1200
vcore1.4
cpupll 1.8
qpi 1.535
ioh core 1.32
dram voltage 1.66 seems stable enough at this. Most stable I've ever had it unless it's at stock.

If I set the ram to 1600 it just resets instantly on boot unless the dram voltage is at something crazy like 1.8 and even then I think it's unstable after 7-8 minutes.. Am I right in thinking the ram is faulty?? Gonna lower All the other voltages to see how low they can go and stay stable.

Thanks,
Chris
 
Although many apps will not use the extra (in theroy) cores running a i7 with HT off you may have well got a q9550 :p leave it on and be a man ;)

oh and never ever ever when o/c leave ram settings on auto :)
 
I have just got a I7 920, Asus P6T S, went into the bios, turned FSB to 200Mhz, tada 4Ghz stable, super pi in 10 secs and plays BC2 sweet. No extra volts nothing, simple as..
 
arfur said:
I have just got a I7 920, Asus P6T S, went into the bios, turned FSB to 200Mhz, tada 4Ghz stable, super pi in 10 secs and plays BC2 sweet. No extra volts nothing, simple as..
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And hoe does that help the OP

FYI more then likely your Asus board is over volting like no tommrrow if that all you done and left things on auto
 
Harty said:
Hi all, thanks for the suggestions I decided to try a little different approach so here are the settings I've been priming with for about 30 mins on a blend test

200fsb
20 multi
turbo/ht/c states and virtualisation off
qpi x36
uncore x19
ram all auto
ratio x6 1200
vcore1.4
cpupll 1.8
qpi 1.535
ioh core 1.32
dram voltage 1.66 seems stable enough at this. Most stable I've ever had it unless it's at stock.

If I set the ram to 1600 it just resets instantly on boot unless the dram voltage is at something crazy like 1.8 and even then I think it's unstable after 7-8 minutes.. Am I right in thinking the ram is faulty?? Gonna lower All the other voltages to see how low they can go and stay stable.

Thanks,
Chris
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Check the ram latencies... but also I hope you just have a bad MB and CPU, because all those voltages are crazy high IMO

BigBruiserAl said:
Although many apps will not use the extra (in theroy) cores running a i7 with HT off you may have well got a q9550 :p leave it on and be a man ;)

oh and never ever ever when o/c leave ram settings on auto :)
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HT does bring enough gains for me and is one of the purposes for a i7 to me, but auto ram is also fine... if you change the multiplier

arfur said:
I have just got a I7 920, Asus P6T S, went into the bios, turned FSB to 200Mhz, tada 4Ghz stable, super pi in 10 secs and plays BC2 sweet. No extra volts nothing, simple as..
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I'd try a full 20 on Intel Burn Test before saying it's stable, as I did the same thing, stable on prime etc... but not Intel Burn test... although if you don't use IBT then you probably won't experience any problems as no programs will push it that far anyway
 
Ok the lowest vcore I could get before bsod was 1.38 and that was without ht and ram still won't go to 1600 is there anything I can do aside get a new mb CPU and ram set?? I've had this bundle since end of November would I be able to rma it under oc warranty to get a bundle that actually does what I payed for it to do?? I emailed them and they sent me a bios update with a profile and the voltages where nowhere near stable still :(.. Any help would be greatly appreciated

thanks, chris
 
If you paid for a pre overclock bundle then send a webnote they will suport you. If it was a normal bundle then you would have no grounds really for a rma as it works std
 
BigBruiserAl said:
If you paid for a pre overclock bundle then send a webnote they will suport you. If it was a normal bundle then you would have no grounds really for a rma as it works std
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IF it works standard, that is the first thing I would do, reset to stock and Intel Burn Test it...
 
Phoned them up this morning while at work and when they heard about the voltages and ram they asked me to send it back so they could sort it for me... I paid for a 4GHz bundle and I shouldve phoned them up a lot sooner as the profile it came with never worked at all but work was just too hectic so put it off hoping to tweak it to work... Ha! Thanks for all the help anyways people.. Maybe when I get it back I can enjoy it.. Anyone knowthe average turnaround for these sort of rma's?

Thanks,
Chris
 
Is 3.8 the sort of speeds that are doable for everyday running of an i7 920?

I have mine at 3.0 Ghz only.

i7 920 Do (Noctua sink/fan), 6Gb 1866mhz Corsair dominator and a EX58-UD5

Thanks!
 
Harty said:
Phoned them up this morning while at work and when they heard about the voltages and ram they asked me to send it back so they could sort it for me... I paid for a 4GHz bundle and I shouldve phoned them up a lot sooner as the profile it came with never worked at all but work was just too hectic so put it off hoping to tweak it to work... Ha! Thanks for all the help anyways people.. Maybe when I get it back I can enjoy it.. Anyone knowthe average turnaround for these sort of rma's?

Thanks,
Chris
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I don't know the time, but it should be only a few days, chances are something was faulty or it was something totally different sabotaging the setup, they will likely send you a new CPU or MB as it sounds like one of those is the problem..

apocReg said:
Is 3.8 the sort of speeds that are doable for everyday running of an i7 920?

I have mine at 3.0 Ghz only.

i7 920 Do (Noctua sink/fan), 6Gb 1866mhz Corsair dominator and a EX58-UD5

Thanks!
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3.8 is easilly doable, try with stock voltages, if stress test fails, up it a little, shouldn't need much increase, keep your eye on the ram speeds, might want to up the qpi and uncore voltage a little bit for stability, and definitely up the uncore if you are going really fast.. but not too much
 
hi all has anyone who has RMA'd a bundle before recieved this? The product BU-003-OB on RMA has been returned to you, this will be sent on a new order with order number. Here is the technicians Test Report: "" (SYSTEM REPAIR: Blue Screen, Component Failure, blue screens) Regards,Overclockers UK - Support

i dunno what they've done have they just sent it back or have they replaced the faulty parts... there was nothing in the test report and the lines were closed by the time i got back lol

Chris:confused:
 
I wouldnt have thought it was repaired as its under warranty with the manu's, I got an issue with my new I7 920 and a Asus P6T board, seems to be hanging in the bios or giving different BSOD errors, not sure if its board or chip... its only 2 weeks old
 
i really think u need better ram i had the same problem with my corsair dominators soon flogged those and went for the cheaper ocz blades which have been great as they will run at 2000 no probs even thou they rated at 1600

once these babies where in my overclock was totally stable
 
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