Phenom X4 9850 safe voltage?

LoneNinja

Senior member
Jan 5, 2009
825
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To start it off, I think I fried my motherboard.

I've been running a Phenom X4 9850 3.0Ghz 1.325Vcore for nearly 2 years now on a Biostar 790GX board. This board has held up well, but wasn't what I'd call a high end board by any means.

Today, since I recently put a Hyper 212+ on my Phenom, I decided maybe I can hit 3.2Ghz. I bumped the voltage to 1.450(read 1.425V in cpuz) and began running Prime95. It ran for about 10min and I began to smell something, almost like a burning smell, so I checked my temps. Shocked to see them near 75C I decided I'd better shut it off, well just as I reached for the power button the system shut it self off. It didn't blue screen or anything, it just straight up shut off.

Since it wouldn't turn back on, I went to pull it out so I could open it up hoping removal of the CMOS battery would resolve the issue, and that's when I discovered even the outside of the case was hot to touch in the top back corner where the cpu power connector is. Upon taking it apart, my cpu heat sink wasn't very warm, PSU felt cool, but the board it self around the cpu power connector was extremely hot. It's also all discolored and literally looks burnt, so I'm sure the board is dead. I'll be swapping parts with another AM2+ system I own to varify it is only the board that is dead.

I'm just shocked, I've never killed anything while overclocking, especially for what I thought was a safe voltage.

My Athlon II X4 630 is on a 780G AM2+ board, I'm thinking of buying a new AM3 board and DDR3 memory for my 630 and moving it's AM2+ board over to continue using my Phenom 9850. Any recommendations on a good budget AM3 board? I don't need USB 3.0 or crossfire support, and would prefer mATX over ATX. 4 slots for ram is preferred.
 

eternalone

Golden Member
Sep 10, 2008
1,500
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Man you might have killed your Cpu. Prime 95 kills motherboards this is a known fact. Next time use OCCT instead. I dont know if that's what happened to your motherboard for sure, but I suggest you also check the cpu in another board first, and stick with OCCT.
 

veri745

Golden Member
Oct 11, 2007
1,163
4
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This is why some motherboards only support 95W processors, since the traces on the board can only handle so much current.

Looks like yours couldn't handle what the CPU was dishing out.
 

LoneNinja

Senior member
Jan 5, 2009
825
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Well my blue colored motherboard looks like a greenish brown on the back now. lol

I pulled the 780G board from my HTPC to get my system that had the 9850 in it running again, everything still works fine.

That 790GX board was rated for 125W processors, but the original Phenom get extremely power hungry when pushed, guess my board just couldn't take it.