psu with 2 8pin connectors

Nvidia recommends a 500 watt or higher power supply.

The best 520 watt power supply I am aware of would be the SeaSonic S12II 520 Bronze 520W ATX12V V2.3 / EPS 12V V2.91 80 PLUS BRONZE Certified Active PFC Power Supply for $54.99 @Newegg.com

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Well, a good place to start would be the PSU Tier List located HERE

Check out the Power Supplies in the upper two tiers and see which is available in your area, once you've found one you like check out their company page to see all available connectors and features. Most mid/high end PSU's provide at least 2 x 6+2 pin connectors, or more if it's modular.
 
i wont go cheap bt dont know if the psu has a 2x8pin and i didnt understand that connectors which are availabe with gpu.. are those like 2 8pin to sata type power connectors which we connet to hdd...
 


The cable that comes with your GPU are Molex > PCI-E adapters, which I wouldn't recommend using. Find a decent quality PSU that has 2 x 6+2 pin PCI-E connectors, all of us have provided links above.
 
I listed the one WITH the label above that very clearly shows you that it does come with 2 8 pin PCIe connectors. Seasonic makes very good power supplies. It is the only brand I buy for my own systems. And so far, its the cheapest one anyone has listed.
 


I am with you on liking Seasonic.
The photo in your post is at odds with the photos and description on newegg.
Newegg says one 6 pin and one 6+2 pin.
It also in the photos shows a 6 pin pcie lead.
Newegg is sometimes off on details, but I wonder if the unit they are selling might be old stock without the two 6+2 leads.
It is probably a moot point since it would not bother me to use a molex to 8 pin adapter with that particular psu.
 


This is the label Seasonic plasters on the side of each one of those...

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It clearly says 2 of the 8/6+2 pin connectors, like the one on the right in this next picture...

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They work with BOTH 8 pin and 6 pin video card connectors.

 
A) The TX series was discontinued. You would be buying old warehoused stock.
B) Corsair is not known for making good lot to mid-ranged power supplies.

It now seems to me that you do not care what quality of power supply you end up buying. You just want someone to tell you that some old, discontinued power supply is good enough, and I am not going to do that. Especially when I know what you are seemingly refusing in an excellently made, high quality power supply.

Do what you want. I have preached enough. I think you have already made up your mind to go cheap though.
 
markW its not abt being cheap.. i didnt know the psu was disconnected... whereas my 1st choice was a seasonic s12ii 520 or 620... bt it does not have a 2x 8pin connector so wats the use of buying 1... if my gpu needs a 2x 8pin...
m searching by 2x 8pin then a good quality psu.....