HIS Radeon HD 6790 IceQ X Turbo 1 GB

No and Yes.

You need two 6-pin connectors to power the card and it occupies two slots in terms of space, it is a double width card, but still retains only I PCIe connection so you only need one mobo slot.

If you have a molex to 6pin connector and have enough VOLTS*amps=watts. then your good.

whats a molex to 6pin? is that the adapter that sometimes comes with the higher end cards?

My power supply is a 550w so that should be enough power, right?

Yes 550W is enough, MOLEX is the standard 4 pin electrical connection (+12v, Ground, Ground, +5V), Djentleman is suggesting a 4-pin to 6-pin adaptor.

[edit] you would need to post your full system specs but 550W for a 1GB 6790 on a standard system should be fine.

To refine what I wrote above, you need to connect to both 6 pin power connections but Djentleman is right, you could use an adaptor like this for this purpose: http://www.pccasegear.com/index.php?main_page=product_i...

No, that is a power hungry card, you must list what power supply you have and how many amps are on the rails.

the card takes 125 watts max, also what other equipment are you running?

that 500w could be generic and only able to push about 300w

+1 check out your PSU before pulling the trigger

What kind of equipment do you need to know about? I have 8 GB ram, amd athlon II X 3 processor, 500GB hD, Dvdrom drive, onboard ati hd 4200 512mb
This is the power supply I have:
http://3btech.net/24pinch55atx.html

that psu is a polished turd in a box. you will need something better to power that card.
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
not trying to be mean, but with a dedicated gpu, you will need a reliable psu, and that one you have probably doesnt even put out 300w even though it says 550w

that has to be the wrost psu i have ever seen.... 28A on the 12v rail.... yeah.... its max power is 336...

(i think i did my math right... its 12v x amount of amps on the rails = watts right? ((so in this case i did 12x28=336, how would you do this with multi rail systems?)))

unfortunately all of the above is true, I have never even seen that brand before...

Point taken, but the dedicated gpu would be disabled if I got a physical card surely lessening the power needed.

I just got this power supply too. I guess I should have researched it more. I only have around $40-$50 max to spend on a psu. Any good suggestions for that price range?

This any good? It has 2 6-pin connectors.
http://www.tigerdirect.com/applications/SearchTools/ite...

dedicated gpu = physical gpu, onboard gpu = one thats on your motherboard, and we are talkinga bout the power requirements for only the card, not the rest of your system, at most your system will probably require about 250w~

the cheapest psu i can recommend in good conscience is this model: http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Edit: even the one i posted is a bit lacking, it will get you there but still a bit lacking, dont cheap out on your psu, grab the one that flint listed

disabling the dedicated gpu will not make up for the fact that your current psu will not power your system with a dedicated card.
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
for the price, it is a little better than most of the other supplies in that range, and puts out well over 560w. at 29.99 with a rebate, its the best for your price range.... I normally wouldnt recommend this psu, but for the price range you have specified and the power usage you will need, it fits the bill and will be much better than your current psu

+1, these other cheaper alternatives will work for now, but its not a good idea to go with a cheap psu

This one says it has 2 x 6+2-Pin connectors. How does that work with the PCI express power connectors to the card? Would this still work? I've not seen the +2 ones before...

yes they will. 6+2 is just that ; 6 pin + a small addition of 2 pin for an 8 pin connector.... i have them on my 570, you just dont plug in the 2 pin addition and use the 6 pin.

So, $50, $55 or $65....

Am I going to get the most out of the antec $65 one? More that I will see a difference in not buying the other 2?

the $65 is the one i would go for, better reliability/quality

the antech will be your best bet; they make quality psu's, and coupled with that 6790, you will be very happy. i know it might be tight money wise, but sometimes you have to sacrifice a punch in the wallet to get something worth while

you could get a corsair builder series ... i think v2 is legit. v1's are blegh

http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Thats a good price with rebate for a good quality psu

Okay, thanks for all the help folks

Np, glad to be of help

Any suggestions on which card would be better? the Radeon 6790 or the GTX 460 768? My motherboard has an amd chipset. Just trying to get the best card I can for around $100 used or new.