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CROSSFIRE 4870 LOW FPS

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OK I HOPE AND PRAY SOMEBODY CAN HELP ME IM GOING NUTS HERE... IM RUNNING A ONE WEEK OLD DELL XPS 630I WITH TWO ATI 4870 HD IN CROSSFIRE. I HAVE A DELL NFORCE 650I MOBO.. (THATS RIGHT AND NFORCE MOBO THAT SUPPORTS CROSSFIRE ITS A CUSTOME BUILD BY DELL)
ITS GOT PCIE X16 BUT IN CROSSFIRE THE BRIDGE IS SPLIT TO X8 DID RESEARCH ON THAT AND FOUND ITS PRETTY COMMON TO SPLIT THE BRIDGE.
700WATT POWER SUPPLY. 8 GIGS OF 1066 DDR2 RAM AND WINDOWS VISTA 64 BIT.. IN 3D MARK IM ONLY BENCHING 16770 SCORE IN CROSSFIRE.
NOW MY REAL QUESTION AND I FIND THIS WEIRD IN CRISIS WITH EVERYTHING SET TO ULTRA 1600 X 900 RES AND 4X ANTI ON IM GETTING ABOUT 20/30 FPS IVE SEEN BETTER FPS ON A SINGLE CARD. IF I CHANGE THE SETTINGS TO HIGH AND AND A LOWER RES IM ONLY GETTING 30/40 FPS.. IVE OC MY CARD FROM 750 GPU TO 850 AND DAYS OF TESTING ITS STABLE TRUST ME AND MY RAM FROM 900 MHZ TO 1200 MHZ. IVE RAN CRISIS AT STOCK 750/900MHZ AND MY 850/1200 MHZ AND NOT ANY DIFFERANCE I COULD TELL... CROSSFIRE SAYS ITS WORKING BUT IM NOT SURE. CAN ANYBODY HELP ME.. PS I EVEN TRIED FLASHING THE BIOS ON BOTH CARDS TO A NEW ONE IT CHANGED THE GPU CLOCK TO 800 AND RAM TO 925 DIDNT SEE AND BETTER RESULTS.. THANK YOU

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yes whats wierd is even at such low fps it runs smooth.. ive seen bench marks with only one 4870 and better fps though i just dont understand. my 3d mark score seems a bit low to

I've never heard of a single 4870 running crysis at that resolution using 4x. Plus, crossfire support on Crysis blows. Try turning off AA if you're having a problem. Try some other games too.

steele_22 said:
yes whats wierd is even at such low fps it runs smooth

That's called graphical horsepower mate. I doubt it would ever chunder even on the now infamous snow level but you are not going to see triple figures this side of an Nvidia buyout.

That's called graphical horsepower mate. I doubt it would ever chunder even on the now infamous snow level but you are not going to see triple figures this side of an Nvidia buyou


Thanks i was tripping out cause i spent all this money trying to get a gaming pc and just thought i would get more fps.. thanks for everybodys input.

if anybody has a single or dual ati 4870's post 3d mark figures or fps from crisis would be nice thank you

I'm betting if he runs Crysis on one 4870, he'll lose maybe 3 FPS. Frankly, I have the same issue running 2x8800GTX in Crysis. Furthermore, I don't ever see the FPS in Crossfire/SLI that reviews seem to get lol.

At some point, you form your opinions based on personal experience . . . so I'm not really interested in Crossfire/SLI any more.

My sympathy.

Twoboxer said:
I'm betting if he runs Crysis on one 4870, he'll lose maybe 3 FPS. Frankly, I have the same issue running 2x8800GTX in Crysis. Furthermore, I don't ever see the FPS in Crossfire/SLI that reviews seem to get lol.

At some point, you form your opinions based on personal experience . . . so I'm not really interested in Crossfire/SLI any more.

My sympathy.






ok so i turned off crossfire and ran 1 ati 4870 and got 5/8 more fps in crysis then i did with crossfire on wtf lol.... 3d mark 06 score with one card was 15200ish only about 1500 less then in crossfire... is my mobo bottlenecking these cards when theyre in crossfire?

3.0 Ghz Intel core 2 Q9650 quadcore @ 3.1ghz
8gb of ddr2 1066 mhz ram
2 ATI 4870's running crossfire @ 850gpu mhz and 1200 ram mhz
nvidia nforce 650i made by dell to support crossfire (weird huh)
2x640 gb hdd

steele_22 said:
ok so i turned off crossfire and ran 1 ati 4870 and got 5/8 more fps in crysis then i did with crossfire on wtf lol.... 3d mark 06 score with one card was 15200ish only about 1500 less then in crossfire... is my mobo bottlenecking these cards when theyre in crossfire?


Well, do keep in mind that, on a base of 20 FPS, 5-8 FPS represents a 25%-40% improvement :) 

Seriously though . . .

Nah, probably not. There's nothing there to bottleneck :)  Check what a 295 does with it:

http://www.hardwarecanucks.com/forum/hardware-canucks-r...

It ain't that good a game . . . turn down the details . . . beat it . . . put it back in the drawer.

steele_22 said:
ok so i turned off crossfire and ran 1 ati 4870 and got 5/8 more fps in crysis then i did with crossfire on wtf lol.... 3d mark 06 score with one card was 15200ish only about 1500 less then in crossfire... is my mobo bottlenecking these cards when theyre in crossfire?

3.0 Ghz Intel core 2 Q9650 quadcore @ 3.1ghz
8gb of ddr2 1066 mhz ram
2 ATI 4870's running crossfire @ 850gpu mhz and 1200 ram mhz
nvidia nforce 650i made by dell to support crossfire (weird huh)
2x640 gb hdd

Iirc the 650i does 8x + 8x when in SLI and 16x when in single card mode, if so and it's running on a 'hacked' BIOS albeit a Dell one that may be the cause of your less than stellar performance when two cards are used.

Quote:
So, no one who knows anything about this decides to post, i know some people are trying to help but other are just either trolling or misinformed.

Crysis, at least using the gpu benchmark shows practically 100% scaling, 2 x the performance with crossfire.

Average fps with crossfire at 19 x 12, 4 x AA, very high i get around 30fps.

With crossfire off i get around 15/16fps.


most of the people above were just referring to how crysis isn't a game of great design quality henceforth the crossfire is not showing results that the original poster may have expected.

Well, then *you* help him if you know he can do better. And dispell all these misconceptions.

Based on the headcount here, several others including me would also benefit. Since my real world, 2x8800gtx, latest drivers, 3.2GHz Intel quad, performs as I said above in SLI and single mode.

yeah I am having problems too. i had a 4780 running and was getting between 20 to 30 fps with one card. The i activated crossfire with 2 4780 cards and was getting 30 to 60 fps but the trees in the distance were flashing.... don't know what the problem is here if one card runs the game on very high but 2 cards seem to mess things up....


config:
AMD Phenom II X4 965 Black Edition Deneb 3.4GHz Socket AM3 125W Quad-Core Processor
GeIL EVO ONE 8GB (4 x 2GB) 240-Pin DDR3 SDRAM DDR3 2133 (PC3 17000)






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