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First time CF any advice?

post #1 of 9
Thread Starter 
Like the title says, when I built the sig rig I intended to but another card when the prices came down, and well I never really got around to it, but I decided to buy another one from someone on here since it was cheap and I figured the CF performance would be better than buying a new single card (560ti or something)

So my question is what should I expect, this single card still plays metro 2033 at 55-60 frames by itself on high, 1680x1050 AAA, AFx4 (with about 42 heavy action scenes) at 820/980 but will it be a noticeable difference? Will the q6600 hurt me at 3.6? Will the MoBo only supporting 8x in CF hurt me?

They will both be water cooled along with the cpu, and I know they are not known to be great OCers. But should I expect to have problems, micro stutter or incompatibility problems?

Also, I haven't been able to get this card to go any higher than I posted above stable if i try to give it any voltage at all in Afterburner it just locks up and blacks out, is there something I am doing wrong, I would like to get the most out of both cards on water when I get the other one in.
Edited by PLeXuS4200 - 6/6/11 at 5:56pm
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post #2 of 9
FWIW, going on FPS results from various reviews, 4870 crossfire performs just a few FPS shy of a single 5870 in most games and is actually better then any variant of 560. So don't waste money on a 560.

As for Metro 2033 running at 55-60fps @ 1680x1050, 4870 crossfire can do that with more recent CPUs, but I'm not sure they'll do it with your Q6600.

Regarding overclocking. I was limited to 825 core as well with my MSI 4870, and it would also freeze if I tried to bump the voltage above 1.28v (from memory) in MSI Afterburner 2.
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post #3 of 9
If you're already getting good performance with one card, two will likely result in better framerates, but you should check out reviews for the game and see whether the game is CPU intensive or GPU intensive, or both. In my case, I went from a Q9300 (second gen C2Q, 45nm) at 3.3ghz (up from 2.5) with a single 6950 to a SB build with the same 6950, and there was a definite improvement in smoothness of game play in my mainstay Battlefield Bad Company 2 in the upgrade, so I was definitely limited by CPU even though I was up running at 3.3ghz. BFBC2 is notorious for needing more CPU horsepower to keep the game going, so it really depends. Best check and see what reviews say about the demands of the game.
post #4 of 9
Thread Starter 
Thanks for the replys. @nefer, I am already getting those frame rates with a single card so I don't know how much if at all it will improve with CF primarily because I will be limited to 512MB or vram. More than anything I just wanted to be sure for the additional cost ($120, new card and 2 waterblocks) that it is the best deal for me right now, and I have seen where they preform well against even the 5xxx and low 6xxx cards.

As far as future ability goes, I plan to do a sandy-e build some time next year and just want this system to get me there, which I feel it will. I built it with all new shiny parts in 08 so if it makes it 4 years it has done me well.
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post #5 of 9
Crossfire advice: Don't do it.

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post #6 of 9
8x/8x will not hurt you. it's not a bad thing to get another if the price is right. as long as the games you play support CF, then you're golden.
post #7 of 9
I'd actually advise NOT crossfiring on the basis that even with a 1GB card as your secondary/primary, you'll be limited to 512mb of vRAM due to your current card. My general principle is that even with last year, or the year before's top end hardware, crossfiring is only necessary when looking at resolutions approaching 1080p and above. Your 4870 is marginally slower than my 6850, but at 1080p with AA etc, you'll have problems due to the lack of vRAM (and the speed of it too).


If you had the 1GB model, I'd say go right ahead, but right now I'd suggest you either wait a bit longer to try and get a better deal, or look at buying something with a good value for money/performance ratio to cut costs.


Your motherboard is running PCI-Express 2.0, so running at x8 won't be a problem for you, my only problem is the 512mb of vRAM on your GPU.




If you're happy with the FPS you get in games right now, I'd suggest you wait until a time that you're not happy with it.
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post #8 of 9
Thread Starter 
Well I got the 2nd card for $65 shipped which I feel is a good deal considering what these cards are going for still on e-bay and even newegg had a 4850 recert for $75 + shipping today. I don't really run at a high resolution so I don't know if I will gain much if anything from the second card other than cool factor.
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Home Work
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CPUMotherboardGraphicsRAM
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A-Data N002 128GB SSD, 1.5TB WD Green Pioneer DL-DvD/RW XSPC RASA 360 push/pull Windows 7 64bit Ultimate 
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post #9 of 9
Crossfire is worth it !
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