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Frustrating x6 overclock

post #1 of 47
Thread Starter 
Yesterday I got myself a shiny new 1090t to replace my old Athlon II X4 630, and set to overclocking it. I got it to POST at 4.4 GHz, and even boot into Windows reliably at 4.2 GHz. However an epic crash (horizontal lines, frantic beeping, bluescreen if I was lucky) soon followed. I lowered it to 3.8GHz and it would run OK, but Prime95 would crash the whole system after about a minute, and cores 5 and 6 crashed almost immediately after the test started. Just for kicks I set my BIOS back to the factory defaults, set my RAM settings manually, and activated the automatic %10 overclock, but got the same results even then. It only seems stable at bone stock speeds and nothing else. For my attempts, I always kept the ram at the rated 1.65v, around 1000-1100 MHz, and the timings a step higher than rated. Also it is an M4a79XTD-EVO board, with the newest BIOS.

I thought the settings for the 3800 trial would do it, but they didn't. I used 200 MHz FSB, 20x multi, 1.45v CPU, 2400 MHz NB, 1.25v CPU/NB, 2000 MHz HT link, and 1.22v NB. With the RAM underclocked a bit to try and eliminate it as a problem. It is OCZ 1600 I7 Gold RAM.

For what it's worth, on the exact same setup I had my old Athlon running at 3.6 GHz, with 2400 MHz NB and the RAM overclocked.

I have read what seems like every guide Google can come up with to O/C'ing this processor, but can't get it sorted out. Can anybody come up with anything I may have missed?

- Almost forgot, OCZ Vendetta cooler, and that diamond stuff for the paste.
post #2 of 47
You don't say what kind of ram you have. It took me a while to get to 4.05 but it's stable & quick. My settings are on my system stats. You can start there& see how it goes.
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post #3 of 47
Thread Starter 
Oh yeah, I must be slipping. Could have swore I put it in there. OCZ I7 Gold. I don't particularly care for it, but I don't feel like buying 8 more gigs of DDR3 right now, lol.
post #4 of 47
I hope that is not triple channel that you stuck in there o.O because that will give problems. besides that, you got a pretty old mobo for a 1090T wouldn't surprise me if the board just can't handle it.
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post #5 of 47
Thread Starter 
No, it's dual channel, I just checked. Had me worried for a minute. I didn't know the board was so old, I only got it a little over a year ago. I did check around before I got the new CPU and Asus has released several BIOS updates since the six cores came out, and some other ppl have overclocked them with this board so I figured it would be ok.

On another note, I have been messing around some more and have gotten to a point where 3800 seems to be the wall. No matter what I do with CPU voltage or RAM that doesn't change. I think maybe it may have something to do with the northbridge. It's running right now at 2200 MHz NB and 1066 RAM. NB won't go over 2400 without failing to POST, and i'm a little leary to mess with the voltages. I have both CPU/NB and NB voltage adjustments in the BIOS, but have no idea which is what.
post #6 of 47
I use the same Mobo, not very good for overclocking. with my x6 1075t max 3.75Ghz.
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post #7 of 47
CPU/NB Voltage is for the NB Freq. Raise the NB Freq up between 2600 and 3000MHz Stock would be around 1.1v and a safe high limit would be 1.45v for your mobo. For 2600MHz you may need 1.275-1.325v. My 3070 runs at 1.468v on a CHIV. Manually set the CPU/NB voltage and make increases till stabilized.

NB voltage is for the chipset. Usually auto is fine unless Ref Clock is above 260-300MHz.
 
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post #8 of 47
Thread Starter 
Not what I wanted to hear, lol. If I will have to buy a new motherboard anyway, I might try to take it back tommorow and just get an i5-2500k, since the cost will work out both ways. I still want to see if I can get this one past 4.0 and stable. If I can do that I'll keep it.
post #9 of 47
8 gigs of ram is going to limit your clock potential a bit as well. 4 gigs is usually easier to get stable at higher clocks.

Also that cooler is probably not the cream of the crop when it comes to cooling for overlocking...what are your temps looking like?
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post #10 of 47
You should list all your systems spec in your sig so we can see what all your running.

What cooler do you have? My bad I just spotted it.
Your biggest issue is either heat from low performance cooler, or lack of CPU/NB Voltage to help stabilize the 8GBs of ram.

Feel free to PM if you'd like more help.
Edited by The Sandman - 4/17/11 at 11:53pm
 
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Bruce
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