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Overclocking my Q9550 on the 750i FTW - Page 2

post #11 of 29
Quote:
Originally Posted by NoodleGTS View Post
Okay so this last run lasted about 4 hours and then I went to bed.. when I woke up my screen was blank and my computer was frozen... so reboot and up the voltage!

Trying again for 3.825GHz at 1.382v. I really wish my motherboard didn't suck so bad!
Time to tune your GTL reference voltages. Here's how:

Do one lane at a time. For each lane, start at 0. Work your way UP one notch at a time until the system stops POSTing. Note the last value that booted. Then work your way DOWN from 0 until the system stops POSTing. Note the last value that booted. Set it to a point halfway between the bottom and the top of the range that booted.
Edited by error10 - 12/16/08 at 6:18am
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post #12 of 29
Thread Starter 
Quote:
Originally Posted by error10 View Post
Time to tune your GTL reference voltages. Here's how:

Do one lane at a time. For each lane, start at 0. Work your way UP one notch at a time until the system stops POSTing. Note the last value that booted. Then work your way DOWN from 0 until the system stops POSTing. Note the last value that booted. Set it to a point halfway between the bottom and the top of the range that booted.
Quick question - what are you saying is the indicator that I need to tune those lanes? Is it that my computer blanked out or that it froze? At what point do you stop increasing voltage and start tuning those lanes?

Also had a question about RAM.. do you think I should stick with my current RAM? It's good ram, runs at 5-5-5-12 at 900, but 3.825GHz is 900 at synced settings and if I want to clock above that then I'm really pushing the ram. I think my memory is good up to 1000 with looser timings, but will faster memory (stock) help OC better?

Also can you recommend a memory if this is the case? Newegg plz, and need 8GB! DDR2. Willing to spend a little bit more to get something that will perform better, but not more than $130 or so...
post #13 of 29
i dont think there is any problems with the ram you have as of now.. they should be able to go pretty high. mushkin is pretty good.

if u were to buy new memory, ive heard the g skill ddr2 1066 were very good as well. ive at least have had it running at 1066 on linked with a 4.0ghz OC on my q9650... should be able to go much higher if i play with timings....

theoretically the 750 is the same as the 780 except 780 can get tri-sli. thats about it from what ive heard.

heres something that may be effecting your OC though. try keeping an eye on your voltages with like HWmonitor. chances are, at load, its vdroop'ing down. i had a 0.06v droop! did a pencil mod and it doesnt even move anymore! helps knowing waht the actual voltage your cpu is getting at load.. also, if u fold, that may change voltages as well. i havent had really good results with 12v readings with that program so if u have a multimeter handy, could always use that in a molex plug to get more accurate results! ^^
 
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post #14 of 29
Thread Starter 
Hey guys, so I just upped the voltage slightly to 1.38v under load in windows, and here's what I got. Core1 failed within ~3 hours. Cores2-4 ran fine for 12+hours until i stopped it. Just got home and realized 1 failed.

What can I do to remedy this?
Also can you be slightly more detailed as to how I should tweak my GTL lanes?

Thanks!
post #15 of 29
Thread Starter 
Quote:
Originally Posted by error10 View Post
Time to tune your GTL reference voltages. Here's how:

Do one lane at a time. For each lane, start at 0. Work your way UP one notch at a time until the system stops POSTing. Note the last value that booted. Then work your way DOWN from 0 until the system stops POSTing. Note the last value that booted. Set it to a point halfway between the bottom and the top of the range that booted.
Hey.. quick question!

My GTL reference voltage can only be increased! What gives?
post #16 of 29
Quote:
Originally Posted by NoodleGTS View Post
Hey.. quick question!

My GTL reference voltage can only be increased! What gives?
That's all right. Since you've upped the voltage, the GTL reference you need is probably going to go up anyway. Just try it from the bottom to the top of the available range.
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post #17 of 29
Thread Starter 
Hey hey everyone.

Ok... I am Prime95 stable for ~10 hours at 3.825GHz at 1.432 CPU-Z voltage (load). Gonna leave it testing until I get back from work, then aiming for 4GHz.

Quick question. If all the cores are fine and just one fails, is there a way to increase the voltage just on that core a little? For example if core 0 is crapping out, does that mean that I can increase the voltage on lane 1 (out of 4) and try to stabilize that core?

Thanks
post #18 of 29
That's a LOT of voltage, probably a lot more than you need. Bring it back down to 1.375 or so and then tune your GTL reference lanes. That ought to get you stable.
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post #19 of 29
Thread Starter 
Quote:
Originally Posted by error10 View Post
That's a LOT of voltage, probably a lot more than you need. Bring it back down to 1.375 or so and then tune your GTL reference lanes. That ought to get you stable.
Okay so if I take the voltage back down to where I had it before (~1.38) what happened is that my primary core failed and all the rest were stable. Is there a way to just increase the voltage slightly for that core?

I tried doing what you said with the GTL reference lanes however I only have the option of increasing the voltage on these lanes (I've got 4 lanes, which go from +0mv to +165mv or so). Can one use these lanes to stabilize the 1 lazy core?
post #20 of 29
Quote:
Originally Posted by NoodleGTS View Post
Okay so if I take the voltage back down to where I had it before (~1.38) what happened is that my primary core failed and all the rest were stable. Is there a way to just increase the voltage slightly for that core?

I tried doing what you said with the GTL reference lanes however I only have the option of increasing the voltage on these lanes (I've got 4 lanes, which go from +0mv to +165mv or so). Can one use these lanes to stabilize the 1 lazy core?
Quote:
Originally Posted by error10 View Post
That's all right. Since you've upped the voltage, the GTL reference you need is probably going to go up anyway. Just try it from the bottom to the top of the available range.
Did you miss this?
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