Crossfiring hawk 5770

[karthik.011]

hi guys

i am planning to crossfire my hawk 5770 but i have a few doubts

i am using a gigabyte h55m-usb3 motherboard..

it has to pci slots: rated at 16x and "4x" respectively..

i wanna know if its worth crossfiring in this board?? will it affect overall performance bcuz the second slot is 4x..

also which power supply do i go for vrossfiring??
currently running at vip 500w

my cpu is intel i5 750
ram 1333mhz transcend jet ram

thank you

 

[CurseTheSky]

One PCI-E x16 and one x4 is not ideal for Crossfire. IIRC it will work, but performance will be significantly worse than two cards at x8 + x8 or x16 + x16.

Personally, I'd pass, and grab a stronger single card (perhaps wait for the next generation?)

 

[happy medium]

It will effect performance but only about 5% or less.
A 500 watt psu might be enough. How many amps on the 12+ rail?

 

[karthik.011]

1 x PCI Express x16 slot, running at x16 (PCIEX16)
(The PCIEX16 slot conforms to PCI Express 2.0 standard.)
1 x PCI Express x16 slot, running at x1 (PCIEX4_X1)
2 x PCI slots

this is whats written in the specifications

And i how do i check how many amps are are in 12+ rail ?

 

[happy medium]

1 x PCI Express x16 slot, running at x16 (PCIEX16)
(The PCIEX16 slot conforms to PCI Express 2.0 standard.)
1 x PCI Express x16 slot, running at x1 (PCIEX4_X1)
2 x PCI slots

this is whats written in the specifications

And i how do i check how many amps are are in 12+ rail ?

So you have pci-e x4 running at x1. Thats no good for crossfire. sorry.

newegg link

http://www.newegg.com/product/product.aspx?Item=N82E16813128429


Its written on your power supply.

 

[Powermoloch]

According to this article:

http://www.techpowerup.com/reviews/AMD/HD_5870_PCI-Express_Scaling/1.html

they tested a 5870 on a 1x slot vs 5870 on a 16x respectively. It is a big 25% performance drop. That being said, since you're going to hold off.

 

[RaistlinZ]

Change your motherboard, or just grab a faster single card.