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Help Me Solve my 5770 Crossfire Issue... Please! ;)

Yeah I had ASUS P7P55D motherboard with x16/x4 slots and 5770's in crossfire and had the same problem games where very choppy and bad fps lag so I decided to swap the board for the ASUS P7P55D PRO which has x8/x8 slots and its 100 times better , everything is now mint and smooth as hell, I would say LoadsaMoney has hit the nail on the head though.
 
Bit off piste and a high jack (sorry) but would a x16 and x8 have the same problems? I have a gigabyte EP45-Extreme which says it has x16 and a x8 crossfire compatible pci express slots. Sorry xfire n00b here.
 
Bit off piste and a high jack (sorry) but would a x16 and x8 have the same problems? I have a gigabyte EP45-Extreme which says it has x16 and a x8 crossfire compatible pci express slots. Sorry xfire n00b here.

Nope, that would be fine :)
 
If youre close enough your welcome to test them in my rig ( in sig ) :cool:

Thankyou for your kind offer, but to save wasting your time I'll just buy a different mobo :)

Yeah I had ASUS P7P55D motherboard with x16/x4 slots and 5770's in crossfire and had the same problem games where very choppy and bad fps lag so I decided to swap the board for the ASUS P7P55D PRO which has x8/x8 slots and its 100 times better , everything is now mint and smooth as hell, I would say LoadsaMoney has hit the nail on the head though.

Thanks, I thought it would lose a few FPS! not feel like complete horribleness.

Bit off piste and a high jack (sorry) but would a x16 and x8 have the same problems? I have a gigabyte EP45-Extreme which says it has x16 and a x8 crossfire compatible pci express slots. Sorry xfire n00b here.

Post away, I've no problem with it :)
 
Im curious to know why afterburner is showing min gpu/memory clocks on GPU1 of 14 and 25. Maybe that PCIe slot is going into a very low power state? My minimums are 157/300 for both cards, never going below that.
 
what does gpuz say about the pcie link speed of your cards ?

8x 8x ? or maybe 1x :eek:

16x.. and 4x ;) :p

:o Sorry.. I have since edited as I was wrong in saying 8x and 4x.

linkspeed.png
 
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so it dosnt drop the first slot to 8x on p35 and yet on p55 it drops to 8x 8x on each slot, i thought all boards were like this exept the x58 boards
 
and something dont seem right in the screen shot TaKeN, as it says crossfire is disabled on both

It is ;)

It plays better on a single card, I'm waiting for my X38 mobo off the MM to arrive you see.

Then I'll install that and crossfire them again :D
 
As others have posted, the problem you have here is the asynchronous nature of pushing data to your cards when one can run at 16x and one can run at 4x.

Personal experience with a pair of X1900GTs in software crossfire back in the day showed me what a waste of time it was on a 16x\4x setup - this was on an old P5WD2 motherboard with the X955 chipset.

Your CPU isnt holding you back - Crossfire performance in Benchamrks scales with CPU speed, I've personally noticed.

At 2.4Ghz I was getting around 13K 3DMarks in 06.
At 3.6Ghz I was getting 20K+ 3DMarks in 06.

Get that board swapped out, and to be honest, go 16x\16x (X38 or X48 board). The more data you can feed your cards over the PCI-Ex bus the better in my opinion.

I've had nothing but great performance from my setup of dual 4870s on my X38 board (after I solved the VGA BIOS issue, lol!).

PS Will keep an eye on all these 5770 crossfire threads as Im interested in swapping to an Eyefinity setup in the future when it has some more game support.
 
I noticed you've got the same motherboard, processor and graphics card as me, however i only have one 5770, does the pci x 8x bottleneck my 5770?
 
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