nvedia 750 or amd r7 260x

[budgted gamer]

hi guys my specs r intel i3 3210
msi h61 p20 mobo
2 gb ram
350 gb hdd
450 w cooler master thunder psu

i am so confused finally i save 9000 rs (very big amount for buget gamer ) cant increase my buget as i have to buy 8 gb ram also so guys pls help me i saw these 2 graphics card on ebay but no body has any reviews and ebay is useless seller doesnot have full specs so guys pls help pls check these 3 graphics card as in the link below btw i am a noob in graphics card and there is no dvd or any other fans so will my power supply will be ok no future upgrades want to play witcher 3 ets
http://www.ebay.in/itm/Gainward-Gtx-750-2048-MB-DDR5-Graphic-Card-/151821443418?hash=item235943615a
or

http://www.ebay.in/itm/Graphic-Card-HIS-H260XF1GD-AMD-Radeon-R7-260X-1GB-graphics-card-/151809648055?hash=item23588f65b7
or
http://www.amazon.in/Sapphire-Radeon-7770-Vapor-X-GHZ/dp/B00VV1RQE0/ref=sr_1_sc_1?ie=UTF8&qid=1443700114&sr=8-1-spell&keywords=amd+redeon+hd+7770+vapor+x
thx a lot tomshardware community is really good and this gainward nvedia gtx 750 is fan model not fanless i asked the seller about it
i want to know if his r7 260x have any heating problems as my cabinet has no fans and will 450 w wil be enough
i am really on a tight budget cant spend a penny more thx

 

[budgted gamer]

i also found used graphics card
http://www.ebay.in/itm/Sapphire-AMD-Radeon-HD-6950-2GB-Dirt3-Edition-GDDR5-PCI-Express-x16-Graphic-Card-/191703425146?hash=item2ca26a207a

and

http://www.ebay.in/itm/MSI-AMD-Radeon-HD-6950-2GB-Twin-Frozr-III-PE-OC-GDDR5-PCI-Ex-x16-Graphic-Card-/191703454959?hash=item2ca26a94ef

should i trust used products and will my power supply will be enough to power them and i think sapphire one has box and stuff pls respond and my power supply has only 1 6pin power connector

 

[PCHelper]

HD 6950 > R7 260X > GTX 750

 

[budgted gamer]

HD 6950 > R7 260X > GTX 750

can my psu handle 6950 ???? 450 w cooler masted thunder

 

[PCHelper]

No it cannot. The HD 6950 requires 500W PSU. Plus that is an used product from ebay which has a confusing warranty policy.

Go for the GTX 750 from Amazon instead and will work fine with your PSU.