GTX 460 1GB vs HD 5770 1GB

[Jiniix]

As the title says, which is better?

Info:
Sapphire HD 5770 1GB (850MHz -> 940MHz / 1200MHz -> 1435MHz)
Reference GTX 460 1GB at stock

Rest of the build:
CM HAF 912 (very well ventilated, have a great cooling setup)
Intel 2500K @ 4.2GHz w/ Seidon 120-Corsair SP120
ASUS P8P67 B3
Kingston 2x4GB 1600MHz
CM SilentPro Modular 600W
WD Raptor 300GB / WD Green 500GB

It's for my brother, and his Steam library is larger than light, so it's for very general gaming

I have an HIS HD 5770 1GB (can do 935MHz/1400MHz) lying around, but the motherboard only has PCIe 2.0 16x, 4x, not 8x, 8x - but it is possible to set up CFX. But will the performance hit be too hard with one of the cards running in 4x?

(I'm not buying anything, it's all spare parts. Just trying to make the best rig for my brother)

I've looked at a few benchmarks, and it seems the GTX 460 is a little bit in front, but I couldn't find overclocked HD 5770 benchmarks that could be compared.

Thanks in advance!

 

[SpringWater]

The 768mb 460 beats a 5830 so I'm pretty sure the 460 wins.

 

[PCunicorn]

A 460 will be significantly better. Usally 460s overclock very well so after OCing you can make it 6870 level.

 

[Okedokey]

Just test them. However the 460 will win.

 

[Jiniix]

The GTX 460 gets quite hot and loud already, not going to overclock it. I was pretty sure it would beat the HD 5770, just not by that much.
With the GTX 460 there's sometimes/often no image on boot. If I then swap it out for an AMD card (have a few, 5770s, 6870 and 6450) it always works. I had the same issue on an ASUS P8P67 EVO B2 with the same card - ever heard of any compatibility issues on that front? Works 10/10 in a GA-G31M-S2L with a Q6600 and 2x2GB DDR2-667MHz RAM :/

But how about that Crossfire? 16x-4x vs GTX 460?

EDIT: Found this (on Anandtech forums )

So definitely going to try and add a HD 5770 in the 4x slot. Now with the 13.12 drivers, Crossfire is much better.

EDIT #2:
Just finished testing it (had to enable 4x in the bios, this disables all other PCI slots and internal USB3 (not the two in the I/O, they still work))
Tested the first mission in BF3 (Fraps), because it's super consistent, and went from a minimum FPS of 28 to 55 with 16x, 4x CFX - not bad. On high settings 1080p.