Melted Cable

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Joined
21 Apr 2006
Posts
1,477
Hi all,

Had a very weird problem this morning with my PC - something i've never seen before. My setup is:

Athlon 64 X2 Dual Core 3800+
2GB OcUK Value (2x1GB) PC3200 184pin DDR Memory Dual Channel Kit (MY-006-OK)
Gigabyte K8NMF-9 nForce4 Micro ATX

Yesterday I recieved another 2 gig of the same RAM, and:

Seasonic M12 Modular 600W Silent ATX2.0 Power Supply
BFG GeForce 8800 GTX OC 768MB

I fitted everything in and it all worked perfectly. My old setup had been working for the previous year with a 7600GT perfectly, only the 2 gig, psu and 8800 were new.

This morning I was in the bios and changed the RAM timing to T1, saved, rebooted and was met with a black screen. THere was a slight screetch, but it sounded more like a fan than a beep. Turned it off, and back on, and suddenly a lot of smoke started coming from the pc!
I pulled the powercable and started pulling out the RAM looking for damage. it looked fine, so next pulled out the HDDs and they were fine too.
It seems the smoke was caused by a melting cable connecting the new PSU to one of the GFX power connectors.
The yellow (+12v) cable literally melted all the way from the connector to the GFX card up until the PSU.
On first glance there is no damage to the GFX card or the PSU - but I've had to come to work, so can't research this further.

Anyone have any idea what happened here? Surely moving RAM timing to T1 shouldn't cause the GFX card cable to melt. Or was that a coincidence?
At the time I wasn't overclocking any part of the machine, and I only changed the RAM timing settings. Prior to that it had been running with no problems all night.

Any help in finding out what happened would be appreciated!
 
Only time this happened to me was after I had ghetto style volt modded a fan (then forgot about it) and plugged in another fan on the 2nd port.

The only thing I can think in your situation is that when you put the ram in you knocked the power cable making a very loose connection?
 
dun said:
Only time this happened to me was after I had ghetto style volt modded a fan (then forgot about it) and plugged in another fan on the 2nd port.

The only thing I can think in your situation is that when you put the ram in you knocked the power cable making a very loose connection?

Something I forgot to add is that after the first blank screen, I took out 2 1 gig blocks of RAM for the second try. I'm sure I didn't losen any cables but this is something i'll look into.

The 2 power adapters for the gtx both branched off into 2 molex connectors. I used 1 molex from the psu to feed 2 connectors, and 1 for the other two. Could this have caused any problem?
 
Could you list your full spec please mate?

Edit: mainly if you are now running 2 8800's?
 
dun said:
Could you list your full spec please mate?

Edit: mainly if you are now running 2 8800's?


Full spec when the meltdown happened:

Vista x64 ultimate
Athlon 64 X2 3800+
4gig PC3200 184pin
Gigabyte K8NMF-9 nForce4 Micro ATX
Seasonic M12 Modular 600W PSU
BFG GeForce 8800 GTX OC 768MB

I only have 1 8800, but the card itself has two 5 pin power adapters on it. The box the card came with had 2 5 pin adaptors with 2 4 pin molex power adaptors at the other end.
 
Carefully put everything back together and it's all working fine (just glad I hadn't destroyed the mobo!).
Perhaps the issue was a wire not properly connected - i'll be double checking everything in future :p.
 
misterjingo said:
Carefully put everything back together and it's all working fine (just glad I hadn't destroyed the mobo!).
Perhaps the issue was a wire not properly connected - i'll be double checking everything in future :p.

Sorry for the late response mate been out all day. Glad to hear its sorted :D
 
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