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Should I even bother crossfiring Vapor-X 5870's?

post #1 of 26
Thread Starter 
So I got an awesome deal on an open box Sapphire Vapor-X 1 GB 5870's for $157 a piece so I figured I'd sell my 5850 Vapor-X and get 2 to crossfire.

Problem is, I have an Asus P6x58 Premium Mobo with almost 0 space between the 2 PCI slots. I will at least have a big 200 mm fan blowing on them from the side. Will that be enough?

I also could have gotten 2 eyefinity 6 edition cards (2gb) for about 15 bucks more, but didn't want to go with a reference cooler.

I've also heard bad things about Sapphire's non-reference PBC's being cheap and I believe the Eyefinity 6 edition is a reference (black) board.

So what would you guys do? Hope the side fan is enough and keep the two cards, return them and get the eyefinity 6's when they go on open box again or keep 1 of them and just sell the 5850 and the other 5870?

Note: Water Cooling is not an option for me right now....

Thanks guys
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post #2 of 26
Not sure how much space you mean if the cards are literally stacked and there is less then say 1/4 inch of clearance I do not think 100% fan and a 200mm will help. Could you show a pic to better help us see your 0 space issue?
    
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post #3 of 26
I had two 4870 vapor-x cards pushed up against each other... no problem.
Sorry thats the best I can give.
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post #4 of 26
No - give one to me.
post #5 of 26
Thread Starter 
I'll put up some picks as soon as I get home today. I just got the cards and installed them yesterday. They are indeed, right on top of each other. In fact, I have to removed the top one to get the second one out cause I can't reach the pci slot release lever under it.

I finally got the drivers installed and enabled crossfire, but anytime I play a game, it freezes after a few seconds or a minute. No black or green screen, just freezes and I have to do a hard shutdown.

Also, when I boot up, my asus P6x58 board is now automatically booting up to expressgate even though I disabled it in the bios. When I hit exit, it says hard drive not found, then cpu fan error (I have a corsair H50 and the fans connected to the radiator are working). and to press F1 to continue. Windows will then load. Any thoughts?
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post #6 of 26
Sounds odd, Check you haven't accidentally reset the bios when/by installing the cards.

I would also check your psu but clearly an 850 should be more than enough.

as for the fan thing are any fans/contollers or whatever connected to the cpu fan header if not it might keep doing that error, should be able to turn the check off in bios though.

As for the space, see what load temps you get my 5870s are right up against each other (my coolers make them take up 3 slots) but the temps im getting are only in the low 40's while fully loaded with stock coolers they idle higher than that. No idea how good vapour x coolers are though think they are pretty alright.
Edited by Dr216 - 3/30/11 at 7:02am
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post #7 of 26
Thread Starter 
Dr216, I believe the temp of the hotter card is in the 50's although I'm not sure if that was at load. When idling the other card is at 0% use, so I'll need to find my furmark key and run that.

I believe I have the two fans set to be always on 100% for the push/pull on my radiator. The power for the pump of the H50 is also connected to the motherboard.

I just started getting the two errors after crossfiring, but when I removed one of them, I was still getting the errors. Hopefully I haven't done any permanent damage to my computer

The Vapor-X coolers are supposed to be very good, but the top is just pulling hot air from the bottom one. Also, the VRM's on the Sapphires cards apparently aren't the best. I can't mess with the voltage on those boards anyway. I currently have the first card oc'd to 890/1290 and the second to 890/1275. I just let the autotune set it. It didn't crash while that was going on.

Could this be a driver issue? I'm running 11.3 now.

Can't wait till I get home and start playing around with it. Otherwise I might just sell the 5850 and one of the 5870's and be done with it.
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post #8 of 26
Thread Starter 
Ok, so I have a little more info. The two errors are now gone. I unplugged the power for the H50 from the motherboard and reconnected and the error disappeared.

The no hard drive detected was because I needed to disable the Sata 6 port that I'm not using. Apparently putting the two cards in reset my bios configuration. I noticed it when I was checking the bios settings and my CPU was back down to 2.8 GHz instead of 4.

Thank God for saved profiles in the Asus bios! So the errors are gone but I didn't have a chance to crossfire the cards again. I did update to the new 11.4 beta drivers though.

Temps while running COD MW2 were around 65 C. Is this normal for a game like that? I played for about 2 hours at max settings. Also, I noticed that when crossfiring the cards two days ago, one card would be in use and the other was at 0% at idle. Is this normal or a glitch/driver issue?

Thanks as always
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post #9 of 26
I've had the same issue from another open box Vapor-X 5870. It simply wouldn't crossfire with my reference card causing lockups and screwed with some of my BIOS settings as well.

I didn't take the time to trouble shoot the issue assuming there was a reason it was an open box buy. I bought a Sapphire eyefinity 6 2GB 5870 when it was on sale a while back and it runs perfectly with my other reference card.

Hate to say it OP but can you return them and get the reference models instead?
post #10 of 26
While idling in 2d mode it would be normal for one card to be at 0% usage. Try alt/tabbing out and into afterburner while playing a game to see the usage while gaming.

Sapphire Trixx should give you voltage control even though it is a non- reference card.

I have similar board. Running SLI or Crossfire on it can be a challenge. Rather it is doable for you will be a matter of how hot the cards run to begin with IMO. With my 460's the top card runs about 10-12C warmer than the bottom while gaming and it took a few minor adjustments to get it that low. Turned side 200mm from exhaust to intake, a more aggresive custom fan profile with quicker update period so that it responds faster to rising temps, installed with screws in the back panel to squeeze in an extra mm or so of room by not letting the top card sag at all like it wanted to. Not ideal but it works without being too big of a headache.



MW2 isn't a great game for checking temps because it limits FPS at 90 if I remember right. Doubt that would put one 5870 at 100% usage let alone crossfire.
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