• Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
    Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.

Why does PCI-E adapter/connector need 2 12V's?

N

n64man120

2[H]4U
Joined
Jan 11, 2004
Messages
3,498
I just got a 6800GT PCI-E and my PSU doesn't have a PCI-E connector so I have to use the adapter supplied. It's rather short, and I could just extend the wires (super clean wiring purposes)... but my question is:

Why does it need to connect to 2 different molex's? I gather it's pulling in 2 sets of 12V power... but aren't both lines originating from the same source? Is it that 1 wire would not be enough to power it?

I'll need to extend the wires in this adapter, but I keep thinkging that both the wires end up going to the same source in the end anyways. So what's the point?
 
Its not the fact that it needs to draw on two lines, its the fact that you're switching the single from a 4 pin to a 6 pin connection, so it could be drawing 3 from one and 3 from another. Or I dont know, not to great at this PSU stuff. :p
 
basically the pci uses 1.5 molex. and you have to use a whole two molex for the connector.
 
Yea, what I'm saying though is theres 2 12V lines going into it. But don't those 2 12V's come from the same place? So what's the difference between that and having 1 cable, too much power for 1 cable to handle?

I'm trying to get an understanding of this so when I'm cutting and extending wires to clean up my case I don't mess it up.

Does each of the 2 connections have to be on a separate string coming out of the PSU?
 
Why are you cutting wires on your PSU? There's really no reason ever to do this.
 
n64man120 said:
Yea, what I'm saying though is theres 2 12V lines going into it. But don't those 2 12V's come from the same place? So what's the difference between that and having 1 cable, too much power for 1 cable to handle?

I'm trying to get an understanding of this so when I'm cutting and extending wires to clean up my case I don't mess it up.

Does each of the 2 connections have to be on a separate string coming out of the PSU?
Click to expand...
Some PSU does have seperate 12v rail line for example Enermax Noisetaker 495P. The reason behind this is so that the new components that suck up a lot of juice like for example 6800GT, will have stable power going in without much affected by other components that uses 12v rail. With 2 seperate line, there is better chance to get cleaner and more stable power. Readup the PSU section on the forum, e.g. this
 
Yea I understand all that. I've got a PCP&C 510 ATX, I think it has 2 rails since its the ATX12v 2.1 spec IIRC?

Basic question... Does each of the 2 connectors have to be on a separate strand from the PSU, or can they be on the same one?
 
You must log in or register to reply here.
Back
Top