Thanks guys for all the reply. I will actually be going for a new mobo and cpu (amd also) in the near future, say 4-5 months. But right now, I only will change the psu and gpu. And I don't intend to use SLI/Crossfire in the future. Single gpu is good enough for me. And the cards in the price range of GTX 650 and Radeon 7770 are the ones I can afford at present. That's why I am wondering which one to go for.
@Dorado: I couldn't understand what you meant by GTX 650 will be a waste because of my cpu. Can you please explain a bit?
@Dorado: I couldn't understand what you meant by GTX 650 will be a waste because of my cpu. Can you please explain a bit?
I think what he is trying to say is your CPU will be the bottleneck of the system. Meaning with the 650 will not utilize its power as the CPU is limiting its rendering because it is now the slower component.
In short:
Bottlenecking is when the system not being able to optimum levels because one (or more) components are holding it back. In this case I believe he means your CPU.
Either that he wants the opposite and thinks you should get a better card. but most likely he is talking about the bottleneck
HOPE I HELPED!






Yes, I think that a GTX 650 will be a waste for your current CPU, but if you are going to a new motherboard and new CPU, it will be nice.
If you want some extra performance than the GTX 650/HD 7770, I found these cards on Newegg.com:
Newegg.com - PNY VCGGTX650T1XPB GeForce GTX 650 Ti 1GB 128-bit GDDR5 PCI Express 3.0 x16 Video Card
Newegg.com - EVGA 01G-P4-3650-KR GeForce GTX 650 Ti 1GB 128-bit GDDR5 PCI Express 3.0 x16 HDCP Ready Video Card
(Assassin's Creed 3 game included!)
It's the GTX 650 Ti 1GB. It will be faster than the other 2 cards.
But keep in mind that 1GB video memory is not really much for today titles, so a 2GB solution should be better.
as nostaw5 said, if you can wait to keep the GTX 670, it will be the best choice if you are going to a new CPU and motherboard (you need at least a quad core CPU to use it).
Returning to HD 7770 1GB vs GTX 650 2GB... Well, the difference is minimal, but the GTX 650 has got the 2 GB VRAM...
And keep in mind that a slower Nvidia card, compared to a 10-15% faster Ati Card (in this case, the HD 7770), will have the same performance level in games since Nvidia uses better drivers than Ati ones; they're also updated more often and they contains costant improvements for games.
And also, the Nvidia GPU will render PhysX too.
Since you aren't going to use multi-GPU, in my opinion you should go for the GTX 650, because of the 2GB VRAM, better drivers, better support for games, PhysX support,...
(the HD 7770 should be a good card too

)