Final decision!

If you gonna compare the 7970 with a nvidia gpu compare with the 670 gtx, cause your comparing a mid-end gpu against a high end gpu.
So the obvious choice will be the 7970.
There is no bottleneck with the 7950.

You can get a 670 right now.Free 2 games w/ purchase, limited offer $329.99 after $20.00 rebate card http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Depends on your requirements - what games - some favor nvidia. Do you need compute performance - AMD wins hands down. What is your psu? Give us your full system specs.
-Bruce

Intel i5-3750k

16GB RAM

Motherboard:[CrossFireX] GIGABYTE Z77-DS3H Intel Z77 Chipset DDR3 ATX Mainboard w/ IRST, 7.1 HD Audio, GbLAN, 2x Gen3 PCIe x16, 2 PCIe x1 & 2 PCI (Pro OC Certified)


But, the 7970 won't bottleneck? I'm between those two on the amd's side, 7970 or 7950... And now the nvidia's side is gtx 670... Help me choose

I would go with GTX 670, it has the latest Technologies (TXAA, manual FXAA in controlpanel, boost) and are better watt/performance wise than both. GTX 670 does certainly has better performance than Radeon 7950 by a margain. http://www.anandtech.com/show/5818/nvidia-geforce-gtx-6... In this review they call it a tie between GTX 670 and Radeon 7970. You can see for yourself in the benchmarkings. GTX 670 is cheaper then Radeon 7970, so it's all about how much Money you have, and which brand you favor.

I hope this helped, good luck!

A 7970 will not be bottle necked by your setup. Comparing a GTX 670 to a 7970 is a bit skewed, the 7970 should be compared more to the GTX 680. The article posted above was done back in may, there have been major performance boosts to the 7970 since then. I think the best advice that I can give you is this...if you want the most bang for your buck go with the 7970, if you want the easiest to setup go with the 670 or 680.

7970 hasn't got better? They have released a new and more expensive version, to compare with the GTX 680 it's the 7970 GE. The regular 7970 lies within the performance of the 670. It's a fact, and facts can't be argued with.