First of all i thank you for answering my post & it helped but i am still a bit confused especially after opening up my case & looking at my ps. I don't know much about power supplies or how to read the specs on it. I fpond 3 6 pin connectors each going to a seperate rail i'm guessing each one rated at 12v -- 18 amps. according to your answer, i would need 2 - 6 pin connectors for 2 gtx 480's & 2 - 8 pin connectors. so i already have 2 seperate 6 pin for each 480 , so why can't i use the 3rd 6 pin connector with a y adapter going from 6 pin to 2 - 8 pin connectors to satisfy that part of the requirements.
Just wondering what your thoughts were on & if it might be a remedy. thanks again for getting back so quick.
There are adapters that will adapt a 6 pin to an 8 pin connector. The real difference between the two is the 8 pin has two extra grounds. Some manufactures will even provide these adapters while some will frown on that approach.
There would be no issue on your rig for the rails. The 1k supply is beefy enough to run those cards in SLI.
You don't need to start a new thread you can just hit the reply button and continue the same thread.
Thank you so much for the help Davet50. But do you think i should use two of the 6 pin connectors from the ps with a 6 pin to 8 pin adapter & have each one going to the 8 pin connector on the 480's & then split the remaining 6 pin connector from the ps with a 6 pin y adapter to go to the remaining 6 pin connector on each 480. Thanks again for the reply
No i would not recommend splitting any of the connectors you need an individual connector. Strange that it only has 3 connectors I believe that there should be 4. but at the moment I cannot find a diagram of your powersupply layout
You should have 4 6-pin PCIe power cables. The 6-pin to 8-pin adapters should work as long as they have 3 yellow wires and the cables on your power supply have 3 yellow wires. The power supply should sense the 8-pin being plugged in and provide enough power through the 6-pin since it can provide more than 75 watts. I would initially just buy one GTX 480 for the $200 cost versus buying two of them and one of the adapters to see if it works properly. You may be happy with your gaming with just one anyway versus your current set up. If everything is working correctly and you feel you need to run them in SLI, then buy another. They are the same cost on Newegg also HERE. I do see though that they are providing the adapter to convert two of your 6-pins to an 8-pin which is probably the safest way. However, this would not work running two cards in SLI because you would then need six 6-pin PCIe power cables and you only have four.
well i read the owners manual on my xps & i doo have 4 6 pin connectors so instead of getting the 480's i think i will go with either the 470's or if i can afford it 2 570's as both are dual 6 pin connectors
The GTX 570 is a better performer over the GTX 480 and can be found cheaper now than the older GTX 470 they have replaced since there is a smaller supply of 470s unless you buy them used.
I had 470's in my 720 and they performed well. I have the 570's in sli in my home build and they scream, and draw nominal power. I would recommend that if you do go the dual route that you get a free fan control program such as MSI after burner to run custom fan controls as they do have a tendency to run a tad on the hot side without it.