msi 870a-g54 with SLI?

[m32500]

i was just seeing if i could get some opinions.i have a msi 870a-g54 that i did the sli patch to. .currently i have one gtx 460 do you think its worth getting one more? with the patch would it be any different then a true sli board? can i still use up to date gpu drivers?and my board is a 16x and a 4x pci slots would i take a performance hit,from what i read i don't think i would take a hit with gtx 460's in a 4x slot but I'm still not sure.once i get battlefield 3 that will be my game of choice. or should i save up and get a gtx570 for more vram?

just found another gtx 460 on craigslist for $80 need some input fast!

thanks in advance

system specs
cpu-x2 555be -unlocked to x4 b55 at 3.6ghz
gpu-asus gtx460
MB-msi 870a-g54
psu-seasonic 700w

 

[Achilles1600]

sweetclocker's.com created an performance index of card's in game's (no synthetic benches like 3Dmark vantage) GTX460 SLI is 19% stronger at stock freq and I belive it oc's better than GTX570.

So i would just go with a 460, (hell) for $80 it's a steal.

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[m32500]

i just posted to a guy selling a gtx 570 for 170 who ever replys first im buying ,if i get the 570 ill just sell my gtx460.