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HELP help first time crossfire

muggs

muggs

muggs

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Joined
25 Jun 2007
Posts
2,098
ok so ive just crossfired my 6950's, both flashed to 6970's. on their own they run great but together i get lag however heaven has improved but i think it should be more. could the problem be the fact that both pci-e lanes are running at 8x?

i have a corsair 620w. here are the heaven benchmarks

anything in ccc i should check?

single
single.jpg



crossfire
crossfire.jpg
 
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dude i dont have a clue. i only installed the 10.12a hotfix drivers. wait let me get the full name

here: amd_win7_vista_radeon_hd6900_8.79.6.2rc3_dec16 im sure these are the 10.12a hotfix
 
MichaelM said:
The only results I can find for my CF setup with Heaven V2.1 is as follows

FPS: 93.6
Scores: 2358
Min FPS: 55.6
Max FPS: 246.0

Drivers 8.790.6.2000 (10.11 modified for 6900 Series, not 10.12a)
Done on the 17th of Dec.

6950 is apparently recommended to need atleast 600W, even if drivers help a new PSU would be a good idea as you don't want to fry components due to over stressing the PSU.
Click to expand...

fry components as in components that are not in the psu?
 
lol i install these latest drivers from amd site and they install but do nothing. they dont even ask me for a restart after the successful message. theyu were 112mb, i havent just downloaded the ccc and not the drivers have i because device manager still shows standard vga yellow exclamation mark

ok im going to look for some 10.12a's


right all i can find for 10.12a are the ones i already installed and ran the benchmarks on. can some one link me to 10.12a that dont have this name: amd_win7_vista_radeon_hd6900_8.79.6.2rc3_dec16
 
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hey guys check it out

Capture.jpg


i had a fresh cop of win7 64 on a hd(previous benchies were on vista 64) that i thought i would try. one card is @ 940/1440 other card is 885/1390.

orcvader it did not lag in heaven it lagged in just cause 2.

ive still seen higher benchies but the ppl never mention their clocks.

so what do you think? does it look right. just donloading jc2 now to check if it still lags
 
20fps off, i dont understand? are you comparing my latest bench with the bench you posted? if so i cant see where im 20fps off or am i missing something?
 
oh yes of course you mention stock clocks. i know one card gets normal scores on heaven but cant remember if i tested the other, i do know the one i think i didnt test is the one that clocks really well. i will test it after jc2 has downloaded
 
ok here are the single benches, by the way jc2 runs better now on crossfire but still its not working right because its better on a single card.

benches are at stock 6970 clocks(well one card is running the 890core asus bios other at 880 standard 6970 bios)

880
Capture-2.jpg


890
Capture-1.jpg


so both cards seem fine and the 880 card runs jc2 better on its own, will check the other on its own with jc2 now.

ok jc2 benchmark more or less identical with the other card so it seems both cards are fine, just turn crap when in crossfire. so i doubt its my processor, and the 8 lanes, well dont think its that. could it really be a power issue?

Or maybe p45 chipset sucks at crossfire
 
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yes i always let heaven loop, i run the benchmark three times and get the last result. well have to mess with it tomorrow.

one final thing, martynpd what drivers are you using as i notice they are different to mine, are they the ones that came with the card on cd?
 
^Andy^ said:
Silly question but did you bench them before flashing with 6970 bios? If not can you flash back to the stock 6950 bios and benchmark them. It could be that that the 6970 bios flash is now causing the cards to hit the duff parts that got that card speed binned to a 6950 instead of a 6970 in the first place.
Click to expand...

i switched both bios switches back to default and ran jc2 and it was still the same. never ran heaven tho
 
well new psu has done jack all, i wasnt too keen on the psu being the problem however i did some research on what i have in my machine and whats overclocked and i did need a more powerful psu so i got one, thought i may be able to kill 2 birds with one stone but no.

anyway Michael before i bought the psu i changed drivers to the cd ones and guess what, with stock 6970 speeds i was geeting really close to your score, i accidently wiped the results but my fps was 88 and yours was 93.

anyway here are some new results @1920x1200 note that the cards are switched to bios 2 standard 6950 bios overclocked to 840/1325
Capture-3.jpg


this is whats happening, crossfire works in heaven benchmark. any game ive tried its not working or at least not very well at all, farcry 2 bench, i get 75fps sites are geting 145 same settings, jc2 1 card gets me 33 in concrete jungle maxed out, two cards get me 39.

why the hell does crossfire work so well in heaven but not in games, am i supposed to do something with these crossfire profiles?


also before installing the new drivers, jc2 always ran worse with two cards than 1, well jc2 started working smooth like it does with 1 card but this time crossfire was enabled, BUT it didnt do this straight aay, it was like after a few days. its like it was getting slightly better everyday lol.

are 10.12a official 69 series drivers? if not when are the proper ones coming out as i think this is a driver issue
 
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yeah already did the profiles, no diff unfortunatley, in regards to the latest test i just posted it up to compare to your stock 6970 bench, was meaning that it wasnt far off so i dont think nothing is wrong with the cards. i am satisfied with each card now. im happy wwith the benchmarks in heaven too, just have a problem with games
 
ive just done another fresh install, i was even running without sound drivers, bare minimums but still not wworking.

well i have some new info, i set afterburner to show me the gpu usage onscreen mid game. right heaven both gpu's get thrashed at 99-100%, burnout paradise maxed out both gpu's are running exactly the same percentage all the time and that percentage never exceeded 50%, so in fast city areas frames were dropping, anyway the game looked blurry and crud so i turned blur off, lol now both gpu's max out at 25% and i still get lag obviously. im going to disable crossfire and see the major boost i get in burnout.

ok just had a quick bash, right with crossfire disabled the highest gpu usage i saw was 58% and there wasnt a hint of lag, fps was 59-60 all the way. with both fps could drop to 42 even tho both gpu's were at 50% nearly all the time. anyway mate wants me to play zombies on xbox with him so im sacking this off for now
 
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ok finally put together my 2600k p8p67 pro and 4gb g-skill 1600 ram and loaded win7 on it, its a temp thing as im sending the board back.

anyway did it solve my crossfire problem?.......it wiped it out!!!!

STOCK EVERYTHING ALL GAMES MAXED OUT@1920X1200

jc2 with one card in only, wasnt any real difference in numbers(concrete jungle benchmark) however there was a major difference in feel. with the q6600 flying through the city in a fast jet full speed frames used to drop to 30 and there was plenty of stutter, with the 26k frames were saying 30 but no joke there was like no stutter, shocking. q6600 wasnt doing a real 30fps i think, but the 26k was doing a solid full 30fps, 30 proper fps is excellent to play with.

now i put the second card in and with concrete jung benchmark i used to get 37fps, single card used to bag me 32fps. with 26k power the benchmark hardly dipped under 60, end result was 58fps....wicked

went through the city with fast jet the lowest i saw was 49fps for a sec, majority of the time it was stuck on 60(think i may have had v sync on)....mad smooth.

burnout i just tried with crossfire only, i used to get crud performance wwith both cards and the q6600(got excellent performance with one card tho) fps would dip to the 40's in the citty area and even at 60fps you could feel stutter. well with 26k my fps was stuck on either 59 or 60 anywhere on the map, it did dip to 55 but it was for such a short space of time its was nothing. stutter gone

finally farcry 2. 26k smashed the q66 i was like getting 145fps a lot of the time whereas i was only getting 60-70 with the q66. never dropped below 98.


so it was my q6600, i think the q6600 can hold its ground with one card, but when you add another it flops, and even with one card you still get stutter. the 26k i saw no stutter when playing with one card. looks like it really helps with minimum frame rates which really picks up the smooth gameplay experience you want.

and remember i havent even clocked the 26k this was all done at 3.4, 26k can easily clock to 4.5 and beyond so things can only get better!!!!!!

also i am running the asus 6950 bios shader unlock only, the core and mem clocks were at default 810/1250.
 
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