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i7 920 on ASRock x58 Extreme: help getting from 3.8GHz to 4GHz - Page 5

post #41 of 70
Quote:
Originally Posted by adriangb;12623375 
Updatee biggrin.gif!
  • I reworked my case airflow, it was horrible, now @4GHz and 1.3625v (per BIOS) I get 85C in IBT max. Attached is a VERY CRUDE (as in "done by a three year old") airflow diagram.
  • H969, I followed that guide, it's great. I have determined that the issue I was (and am) having is related to the CPU: I can get up to 205 bclk w/ 1.34v VTT and DDR3 1640 w/ 1.6v and pass 2h Linx, but if I raise the CPU multi to 19 even, I need LOTS more vcore. This starts to happen at 3.6GHz, i.e.: for 3.6GHz, 1.2v (maybe even lower, I didn't test); for 3.8GHz 1.3v, for 4GHz ??. I'm retesting with 1.3625v, since I left it testing and it rebooted (I don't know how far in).
Alright!band.gif
A little bit at a time, and in 6months you be able to run it at almost any thing you want at will, it just takes a little time.cool.gif
That is a great guide? Make sure you pass it along to your friends!!biggrin.gif
Happy Ocing!!!
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H.O.G
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post #42 of 70
Thread Starter 
I keep having to increase the vcore: it's stable at 185x21, but at 191x21 I'm going >1.38v. I've set OCCT to 87ºC max, but the PC still reboots while testing, is there any way that OCCT isn't reading my temps right and the CPU is actually going over 100ºC and shutting off? I'm scared to even consider that...
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post #43 of 70
If it was overheating, the computer would shut down, not restart. OCCT should be accurate. If it reaches the max temp in OCCT, the program will just shut down. Are you getting a BSOD when the computer restarts? If not, you may need to disable the computer from restarting when encountering an error. Control Panel -> System -> Advanced System Settings -> Startup and Recovery -> Settings -> under "System Failure", check "Write an event to the system log", uncheck "Automatically restart", and "Write debugging information" to a "Kernel memory dump".
.
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post #44 of 70
Thread Starter 
Quote:
Originally Posted by B-Con;12628333 
If it was overheating, the computer would shut down, not restart. OCCT should be accurate. If it reaches the max temp in OCCT, the program will just shut down. Are you getting a BSOD when the computer restarts? If not, you may need to disable the computer from restarting when encountering an error. Control Panel -> System -> Advanced System Settings -> Startup and Recovery -> Settings -> under "System Failure", check "Write an event to the system log", uncheck "Automatically restart", and "Write debugging information" to a "Kernel memory dump".
.

I did that, set it to stress and went to have some bf... 20m later I came back and was greeted by a rebooted W7, with no BSOD report...
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post #45 of 70
raise the pci-e freq and see how it will respond.
post #46 of 70
Thread Starter 
Quote:
Originally Posted by prznar1;12630444 
raise the pci-e freq and see how it will respond.
Isn't that dangerous? I've heard raising it above 100 can lead to long term damage, and over 105=instant damage.
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post #47 of 70
Quote:
Originally Posted by adriangb;12632224 
Isn't that dangerous? I've heard raising it above 100 can lead to long term damage, and over 105=instant damage.

You shouldn't have to do 105 pci express bus speed for 4.0ghz to start with. The damage would be corrupting a hard drive at maybe 115+ bus speed on it. I do believe the ssd's are a bit more sensitive then the old mechanical drives.Sometimes it will knock out your onboard nic, make your sound skip, etc. But most of the time when you drop it back down everything works fine again. But any time you overclock you may run into problems with something. As it is all a risk though.

If you was 100% stable @ 3.8ghz, then basically all you need to do is either add a little bclk or up the multi. I didn't read through all the pages the post about the pci-express speed caught my eye.
Edited by KILLER_K - 3/6/11 at 9:53am
post #48 of 70
Thread Starter 
Quote:
Originally Posted by KILLER_K;12632286 
You shouldn't have to do 105 pci express bus speed for 4.0ghz to start with. The damage would be corrupting a hard drive at maybe 115+ bus speed on it. I do believe the ssd's are a bit more sensitive then the old mechanical drives.Sometimes it will knock out your onboard nic, make your sound skip, etc. But most of the time when you drop it back down everything works fine again. But any time you overclock you may run into problems with something. As it is all a risk though.

If you was 100% stable @ 3.8ghz, then basically all you need to do is either add a little bclk or up the multi. I didn't read through all the pages the post about the pci-express speed caught my eye.
Ok, I'll try upping it up to 105.
Summing it up: I'm stable at 200x19 w/ 1.35v vcore and 1.34v VTT. Now I'm going for 4GHz, but even at 1.39v I'm not stable (even if I set OCCT max temp to 87C, and run Linpack, the machine reboots with no BSOD). This is a D0 were talking about, so I think I either have the worst one around or my MB sucks. Anyways, I followed that guide posted some on pg4 and found that my max stable bclk is ~205. So 191 is rock solid, I even tested it with the x15 multi, no issues... But as soon as I go to x21, I need crazy voltages.
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post #49 of 70
Try the 21x multi as it tends to clock better. What is your qpi voltage set to? As since you claims 191 blck is stable the 21 x 191 should be ideal for you then.
post #50 of 70
Thread Starter 
Quote:
Originally Posted by KILLER_K;12632417 
Try the 21x multi as it tends to clock better. What is your qpi voltage set to? As since you claims 191 blck is stable the 21 x 191 should be ideal for you then.
I am using the x21 multi...
VTT (aka QPI) is set to 1.34v. I can go up to 200 bclk with this voltage stable.
Ideal would be 200x20 biggrin.gif
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