TX750W and GeForce 460 questions

[Agi]

I just replaced my GeForce 250 with a MSI GeForce 460. On the 250, there was only one PCI-E power connector. However, the 460 has two PCI-E connectors. There is no information about what to do with those power connectors.

 

1. Do I need to connect both of them? According to the specs on the TX750W, it can supply 60A on a dedicated 12V rail. Can the 460 get the power it needs from one connection or do the two connectors serve different functions on the card?

 

I initially used two direct PCI-E power leads off the TX750W. However, I was having some boot problems and no display. Thinking it was a power issue, I unplugged one of the connectors and used the adapter that takes two 5-pin leads and makes a 6-pin PCI-E connector. After figuring out my problem wasn't power related, I got the system working properly. So here is my second question

 

2. I left the arrangement as described above. I am not using two native PCI-E power connectors - I'm using one of each. Is it bad to do that?

 

3. Am I better off trying to make it work suing the two dedicated PCI-E power connectors?

 

Thanks in advance,

 

Agi

[AndyBoyo]

You need both connectiions made to the GTX460.

 

PSU may be rated at 60AMPS on 12 volt rail but that is certainly not 60AMPS down anyone of the PSU's output connectors... If you tried to pass 60AMP through one of those PCI-E connectors you would end up with a voltage drop and the plastic insulation on the cables would no doubt melt as a result of voltage drop and heat dissapation as the wires of the connector start to heatup and probably glow!

 

Each cable from a PSU is only capable of supplying a few AMPS so you need to be thinking 60AMPS across the connectors and not just one.

 

 

Regards

 

AndyBoyo

[Agi]

You need both connectiions made to the GTX460.

 

PSU may be rated at 60AMPS on 12 volt rail but that is certainly not 60AMPS down anyone of the PSU's output connectors... If you tried to pass 60AMP through one of those PCI-E connectors you would end up with a voltage drop and the plastic insulation on the cables would no doubt melt as a result of voltage drop and heat dissapation as the wires of the connector start to heatup and probably glow!

 

Each cable from a PSU is only capable of supplying a few AMPS so you need to be thinking 60AMPS across the connectors and not just one.

 

 

Regards

 

AndyBoyo

 

Thanks for the response AB. Given what you said, should I bother trying to get it working with both native PCI-E power connectors or am I fine with one native and the other using the adapter (two 5-pins into one 6-pin)?

 

Agi