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5870 CF or new card (68xx or 69xx)? - Page 5

post #41 of 48
Quote:
Originally Posted by jrockut83 View Post
Yeah it's encouraging to me to hear that a 5870/5850 combo works so well. I may just drop the 5870 x 2 but if the prices keep dropping, I will stick with it to try to maintain consistency. Power color pcs+ 5870 all the way
My only questions to you is, how are your temps with that card? I know they are supposed to run pretty cool, but for some reason mine idle and load pretty hot (then again they are kind of sandwiched too).
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post #42 of 48
I've been in the same dilemma for a while as well. I have these 2 options to choose from:

1. Buy another HD 5870 for $230 for Crossfire.
2. Buy 2 HD 6950's and sell my current HD 5870 for a combined upgrade cost of around $420 (Could also potentially unlock to 6970 Crossfire).

Obviously the first choice is the cheapest by about $200, however, it is also the least performing of the 2 options. At 4320x900 (essentially 2560x1600), I can't decide if the 5870 1GB crossfire will be good enough for another year or two especially with the 1GB of VRam. That is the only thing that is making me not pull the trigger on the 2nd 5870 right now.

The second choice is clearly the best one for the road ahead but also requires a $200 premium. The 6950's in crossfire already beat the 5870's in crossfire and if they're unlocked then they obliterate 5870's in crossfire. 2GB of VRam is also really nice for more demanding games in the future and now (Crysis, Metro 2033, etc).

Granted, I spend about 90% of my time playing Battlefield Bad Company 2 where 5870 1GB Crossfire easily pushes out around 75-80 FPS at the resolution I play at max settings. Thats the only thing that is making the $200 premium not so appealing...but then again...Battlefield 3 is coming out this year.

Decisions, decisions.
post #43 of 48
I had the same decision to make with my system recently. I decided to go with the 2nd 5870 (both identical XFX cards) which I bought secondhand on e-bay. I play bc2 a lot and my system fps went from 40-60 at medium to high settings to 90-120 at maxed out settings. I really notice a massive difference now especially when there is a lot of stuff going on like explosions etc and there is no drop in fps. The lastest catalyst drivers also increased the fps from 90-120 for crossfire.

You power supply will run either option but you will be at about 85-90% load which is not good for power usage or fan noise. 1000W or thereabouts would be better.

Cooling, 5870's running in crossfire have restricted airflow, especially on the bottom card, you will need a large fan pumping air over your graphics cards or you will have dramas. I have slightly underclocked my cards to keep them cooler and this has not impacted on the fps.

Good luck with your choice mate!
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post #44 of 48
Quote:
Originally Posted by Halide View Post
You power supply will run either option but you will be at about 85-90% load which is not good for power usage or fan noise. 1000W or thereabouts would be better.
1000w for a 5870/5850 crossfire setup is extreme overkill, the PSU/wattage myth abound
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post #45 of 48
Quote:
Originally Posted by TheLastPriest View Post
1000w for a 5870/5850 crossfire setup is extreme overkill, the PSU/wattage myth abound
+1, I run mine on an 850w. You could get away with a QUALITY 650w.
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post #46 of 48
Quote:
Originally Posted by CovertCover View Post
+1, I run mine on an 850w. You could get away with a QUALITY 650w.
Indeed, I fully intend on going xfire with mine and with an Antec TPN 650w I should have no issue, though I wont have a whole lot of headroom
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post #47 of 48
Thread Starter 
Hmm I guess I didn't really consider power that much when building this rig - first time custom after all... yikes.

How will my 775 thermaltake toughpower xt hold up with CF 5870? I read some reviews on the PSU and it said this model really could've made 80+ silver but they put bronze to be on the safe side. So it's apparently pretty efficient. Is 775 enough for CF 5870 or will it be close? I really don't think I need a kilowatt btw!!
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post #48 of 48
Thread Starter 
Quote:
Originally Posted by CovertCover View Post
My only questions to you is, how are your temps with that card? I know they are supposed to run pretty cool, but for some reason mine idle and load pretty hot (then again they are kind of sandwiched too).
I haven't been watching GPU temps too much since I was more concerned with case ambient (since I have a little dinky apevia case). The ambient only went up from 29/30 to 32/33 during heavy gaming (i.e. crysis warhead on max) so I wasn't too worried.
Budget AMD FTW
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Budget AMD FTW
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Intel 80GB SSD, WD 1TB, Hitachi 500GB Asus BR-042T, Lite-On iHAS424-98 Asetek LC (OEM Corsair H50) Win 7 Pro 
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