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Now I am confused

M

Matthew Kane

Supreme [H]ardness
Joined
Dec 1, 2007
Messages
4,233
A recently bought 8800gt card off ebay has been doing my head in. The seller said it worked but artifacts (was in FOLDING machine) and now in my test machine it doesn't work. It spins up 100% but no POST. So I did the oven bake method. Still no post. Im currently using and avaliable to me only a Cooler Master extreme power plus 500 (rebatched AcBel 450watt psu). On the side it says 12v1 18amps, 12v2 18amps and there is 1 6pin pci exp power connector. The question is, is 18amps adequate enough for the 8800gt and maybe the problem to the 8800gt not posting up due to lack of power? I also heard and researched about Dual Amperage which is total of 12v1 and 12v2 - 30% of the total of the two rails, does this mean, I can buy a 2 molex connector to a single 6 pin pci exp adapter? Or is it 12v1 entitled to the motherboard and then the 2nd 12 rail to the graphics card? Its just doing my head in why this card won't work, and I'm thinking it might be due to the PSU.
 
Power is not the issue. 18A is much more than an 8800GT requires even at peak load.
 
According to Gabe at Hardware Secrets. 12V1 is the PCI-E, ATX 24pin, SATA, Molex connectors. 12V2 is the CPU connector/connectors.

I am not sure what you meant about 30% of combined...the combined 12V is 30A or 360W.
 
is not the power bro. has to be the card. use another card to see if it works. if it does then you card is bad. or put your card in a buddys rig. test it out that way
 
HOOfan_1 said:
According to Gabe at Hardware Secrets. 12V1 is the PCI-E, ATX 24pin, SATA, Molex connectors. 12V2 is the CPU connector/connectors.

I am not sure what you meant about 30% of combined...the combined 12V is 30A or 360W.
Click to expand...

I don't know about that specific PSU, but it is entirely possible for the two 12v rails to share a combined maximum amperage, and each have their own maximum per rail that can be reached so long as the combined max isn't passed.

Whatever you do, don't try to combine the two rails into one connector. That's just asking for a fire.
 
Did the card ever work for you, or are you taking the eBay sellers word for it?
 
I say the card is fried.... and it was probably completely broken before the ebayer sold it to you.
 
i think the card is dead too, go grab another 8800 from someone and test it
 
asyork said:
I don't know about that specific PSU, but it is entirely possible for the two 12v rails to share a combined maximum amperage, and each have their own maximum per rail that can be reached so long as the combined max isn't passed.
Click to expand...

Yes this PSU is a single rail that has been divided up with OCP. There is pretty much no way a 450W PSU is actually going to have multiple 12V rails. Usually only see that with much higher powered unit.
 
Getting a bjorked card is risky at best. Its already broke, then shipped, then cooked. If you read the thread on the baked cards it fixes a couple specific problems relating to solder, and there are a lot of people that tried it that had no success. Its great as a last resort, but its a big gamble buying a broke card with the plan to repair it this way. I think your $$ is hasta la vista. :(

Also, even a weak power supply should let a video card go through post. It might not hold up during gaming, but booting up to windows shouldn't stress even a raidmax :p
 
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