Xfx ati radeon HD 5770 crossfired a good idea for my build?

[zniff]

1) how well would this graphic card perform when its crossfired with another xfx ati radeon HD 5770.
2) and would i need better power supply greater than 650watt (planing to buy a more silent running one)
3) and would there be any risks

heres my build
motherboard: ASUS P7H57D-V EVO

CPU: socket 1156 intel i5 quad core 2.8GHz cache 8MB
CPU-heatsink: Zalman CNPS7000C-AlCu LED CPU cooler

RAM corsair dominator 2x2GB DDR3

GPU: xfx ati radeon 5770 1GB ram GDDR5
GPU-heatsink: standard

AUDIO CARD: ASUS Xonar D2X/XDT 7.1 Channel PCI Express

HDD:western digital 1 Caviar® Black 2TB
got plans about buying another harddrive of the same type

cabinet: Chieftec WH-01 Miniserver Sort
chassis fan: akasa 120mm LED fan

 

[batuchka]

No point CFing with HD5k GPUs for fresh builds

Why


HD6K: single/CF review
http://www.anandtech.com/show/3987/amds-radeon-6870-6850-renewing-competition-in-the-midrange-market/8

 

[zniff]

i may have misunderstood the article
are you saying that HD6k is not that much better than HD5k, and thats the reason for not to crossfire a HD5k?
or that i should w8 until a better graphic card goes down in price, i think that the 5770 is so lowpriced now that i cant almost hold back.
or buy nothing at all
i think im confused

 

[batuchka]

HD6k has superior crossfire scaling and if i were u if u thinking HD5770CF i would hit a single HD 6850 1st ^^

 

[zniff]

this badboy?
XFX Radeon HD 6850 1GB GDDR5PCI-Express 2.0, 2xDVI, HDMI, DisplayPort, 775MHz

what if i crossfire this with the HD5k? would it be safe?
sry if i sound nagging about wanting CF

 

[batuchka]

Nah CF with different gen/class GPU won't work and the scaling would be held back by that HD5770 anyway if it did @@

 

[zniff]

ive heard that the HD 6850 is rather noisy is the rumors true?