can gtx 650 on two 4 pin molex connectors

djrookie610

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Jun 21, 2014
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i am planning to buy an EVGA GTX 650 it needs power connection of 12w 20amps.i have two molex cables of 12w 15a and 12w 16a. can i run the gtx 650 if i connect both the molex cables to the 6-pin adapter?
 
A GTX650 needs so little power that it is one of the few cards that might safely be used with an adapter, assuming the PSU is at least of modest quality. If it is a PSU-shaped object however, such as a Logisys, Diablotek, Apevia, Apex, or other generic junk, I wouldn't.
 

djrookie610

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Jun 21, 2014
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Here are the specs for the 500 Watt power supply in the computer:
*supports 115 or 230 Volts
*DC output is +3.3V(26A), +5V(45A), +12V(15A),+12V(16A), -12V(0.8A),+5VSB(2.5A)
total output is 500w max.
can i run the evga gtx 650 since it only takes less power?
 

DSzymborski

Titan
Moderator
An old PSU with no manufacturer details or brand is not a good one. Realistically, your PSU is actually a 300W one when it comes to a modern PC, not a 500W one, based on the rails and made by a junk OEM manufacturer. That is absolutely not a PSU I'd be running a GPU on with power connector adaptors -- those OEM PSUs are made to be passably OK for the original build and nothing more. Even a fairly low power one like the 650.

I'd either upgrade the power supply to a safe, modern one or put in a 750ti -- the latter still making me uneasy because on an old power supply with old parts, sometimes all it takes is to suddenly need more juice for the PSU to give up the ghost. And in the case of a poor power supply, like the Egyptian pharaohs, take some of your other parts to the tomb with it.

 

xxisubzeroixx

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Jul 13, 2011
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This ^^
 
45A on the 5V rail tells me that PSU is from the pre-Pentium 4 era when CPUs were still powered off the 5V rail instead of the 12V rail, you have 31A at best on your 12V rail, 28A is the more likely number, this assumes that your PSU hasn't lost capacity with age and that it is rated to do full temperature. In practice you probably only have 20-24A left available which is too tight.

Spend a bit more and move up to a PSU of this decade, it will keep you from ever running into this issue again.
 

djrookie610

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Jun 21, 2014
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hey it is not that old..... these are the components im running on it:
♦intel pentium dual core e5700@3ghz
♦WD caviar blue 500gb hdd
♦4Gb ddr3 ram
♦Asus geforce gt 210 silent 1gb ddr3
♦Asus psg4It-lx3 mobo
and a cd/dvd drive

and the desktop runs without any problems :)