GA-P55A-UD3 & CROSSFIRE ? NEED HELP ASAP

[tommyov]

SO I HAVE A GA-P55A-UD3 AND I WANT TO CROSSFIRE WITH 'ATI 5770' BUT I HAVE THE INTEL P55 CHIPSET

NOW I HAVE HEARD ABOUT SOME CONFLECTING THING ABOUT THIS

HERE ARE THE PCI'S

*1 x PCI Express x16 slot, running at x16 (PCIEX16) (The PCIEX16 slot conforms to PCI Express 2.0 standard.) 2. *1 x PCI Express x16 slot, running at x4 (PCIEX4) 3. 2 x PCI Express x1 slots 4. 3 x PCI slots

CAN SOMEONE PLZ TELL ME IF I CROSSFIRE WILL I GET A GOOD PERFORMANCE INCREASE OR WILL I NOT?

WILL IT BOTTLENECK
AND WHAT DOES THIS MEAN
* When SATA3 / USB 3.0 (Marvell 9128 /NEC USB 3.0 Controllers) work at turbo mode, 1st PCIE x16 will work at x8 speed.

 

[Maziar]

Well your motherboard supports CrossFire at 16x4x mode,which is the weakest performer in CrossFire options, so i would recommend you to stay with your 5770 or upgrade to a single faster card instead of CrossFiring it, because 16x4x performs nowhere near as dual 8x/16x

 

[Lmeow]

The last section means that if have any active SATA III or USB 3.0 devices the first 16x PCI-e lane will drop to 8x bandwidth and the second slot will be disabled. As Maziar said CrossFireX will not provide much if any performance boosts with a 4x bandwidth bottlenecking your second HD 5770.

 

[tommyov]

thx thats what i guessed

 

[tommyov]

i dont get how gigabyte could put crossfire all over the box,

thats like buying a HD tv get it home and then you find out its HD, but only on quarter of the screen...

 

[xSociety]

I know this is late or whatever but I have the same mobo with crossfire 5770s and I see double the performance from one card. I know x16 x4 isn't ideal but for higher resolutions it makes a world of difference.

 

[logicalshrapnel]

I know this is late or whatever but I have the same mobo with crossfire 5770s and I see double the performance from one card. I know x16 x4 isn't ideal but for higher resolutions it makes a world of difference.

But are you using a SATA3 (6Gb) SDD drive at the same time? Otherwise you will at least avoid the problem that lmeow is mentioning.

(I'm replying since I'm in exactly this conundrum and contemplating wither it is worth running CrossFireX on this board or if I should bite the bullet and buy a new one.