Stromcrow :
Thank you so much for your reply!
I think this is the information you are requesting.
Intel(r) Core(TM) i7 CPU 920@ 2.67Ghz 2.79Ghz
Installed memory(ram) 6.00GB
Gigabyte ga-ex58-ud5
Thank you!
Ah, if that's the case I wouldn't recommend a GTX 770
if you're not overclocking. Don't get me wrong, you could totally buy a GTX 770 right now and it'd fit into that motherboard. Considering basic compatibility alone, there's no reason to buy a new motherboard as a GTX 770 will fit and be totally compatible with your current motherboard and processor.
However, while your i7-920 may have been top of the line in its hay day, time has made it somewhat obsolete. Your once $400 i7-920 has since been slightly outperformed by more budget line CPUs. Because of this,
if you do not overclock, you can expect your i7-920 to bottleneck a GTX 770 at least a little bit.
If you don't know what bottlenecking is, it's a phenomenon that occurs when one piece of hardware is too powerful for the other piece(s) of hardware to keep up. In this case, a GTX 770 would very likely bottleneck at least a few of your games. The GTX 770 may be able to render frames incredibly quickly, but it won't matter if your processor can't execute the lines of code quickly enough to keep up.
You have two options from here if you choose to go for the GTX 770: Buy a brand new CPU
and motherboard (because new CPUs wont fit into your current motherboard) to accommodate it, or simply overclock your i7-920. Buying the new hardware is at the very least another $170, and that's assuming the motherboard you buy is crap and the CPU is decent at best. Your current motherboard once cost $280, so why get replace something that expensive with so much potential longevity? The i7-920 and the Gigabyte GA-EX58-UD5 are both
built to overclock, so it would be mind boggling if you wasted the opportunity to do so! Seriously, the biggest favor you could do right now is to read up on overclocking. I
highly recommend you don't replace such fantastic parts just yet, even if they are outdated.
So in the end, I recommend your purchase be for a GTX 770 and a good heatsink for overclocking (because as you might find, overclocking by large amounts can indirectly cause a hell of a lot heat). I personally use this heat sink, and it's done wonders for my CPU which keeps cool even though I've used it to overclocked by 1.1 GHz at one point.
http://www.newegg.com/Product/Product.aspx?Item=N82E16835103099
However, you'll have another $200 to spare after the GTX 770, so if you do decide to read up on overclocking, you may think about buying an even better fan. Just make sure it supports your CPU socket (LGA 1366) and it'll fit inside your case.
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If you
really, really just absolutely hate the idea of going the overclocking route, then I feel it'd be a shame to replace those parts. You could buy the GTX 770 and just install it onto your current setup without replacing anything else, but expect there to be a bottleneck. However, I don't know for sure just how bad it'll be. It might end up being not that bad at all.
go for SAPPIRE or ATI cards if you have a limited money..it gives the same Nivida performance..something like SAPPIRRE HD 7850 or 7770, would be cheaper
You're comparing an HD 7770 and an HD 7850 with a GTX 770? That's like comparing hot pockets with caviar. The GTX 770 blows both away, there's absolutely zero competition, and it's not like price is an issue for him anyway. The HD 7970 is the only AMD card that's comparable to the GTX 770, and in this instance the GTX 770 is significantly more powerful than that anyway, though the 7970 is $100 cheaper. Still, the GTX 770 is an absolutely fantastic high-end card. The two cards you mentioned are low-end and mid-range respectively.