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Is Crossfire finally viable?

Last response: in Graphics & Displays
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February 17, 2012 3:51:35 PM

I got lucky and bought a Sapphire 6870 for 135$ shipped and can play LoL fully maxxed @ 1900x1200 at 80 fps, Resident evil 5 all max avg 114fps (benchmark) but Skyrim dosen't play that well or Battlefield 3 which is like 40~ fps :/  , Sonic generations sometimes drops to like 30-40, Crysis drops alot, witcher 2 i was really unhappy with, like 35-40 fps (not even maxxed out), BF2:bc plays pretty nice, high/ultra around 50-75. and i did counter strike source stress test and scored 414 fps lol.

So if i sell my sapphire 6870, for 80 more I can buy the 6950 which will do about a 10-20 fps increase or I could spend another 140 ( 60 more than the 6950) to get another 6870 for crossfire which would (according to most benchmarks) almost DOUBLE my fps.

So money is not THAT big of a deal I guess but, is it finally viable yet?

I have a 800watt corsair gaming series PSU, a crossfire motherboard with x16 and x4 but i read and it dosen't affect performance THAT much, just like 5-10% less than x8

Micro stutter, has it been fixed yet or is it really not that big of a deal? Is it a MAYOR ISSUE?

My prosesor was an anthlon II x3 3.0 but my motherboard MSI g45 870 unlocked and overclocked it to phenom II quad core 3.6.

4 gigs of ripjaws ram OC to 1600.

Resolution might change soon to 1900x1080p with a 32" 1080p TV
Thanks a lot for your opinions!
February 17, 2012 4:00:56 PM

Also, is there a 100~$ Motherboard that supports intel 2500k proccesor and is 8x 8x or 16x16x for crossfire?

Because With selling my unlocked processor, motherboard and my old 4890 i could get half of the money i need to fully upgrade, but only if the motherboard is less than 135$

Any ideas?
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a b U Graphics card
February 17, 2012 4:08:37 PM

the cheapest 1155 motherboard is $120, 2500k is $230, 8gb of ram is $50

bf3 is gpu intensive, you will need a 7950 to max that game out.
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a b U Graphics card
February 17, 2012 4:10:56 PM

I'm not sure about BF3, but Skyrim is hungry for more CPU power. Switching from AMD to a 2500k will get you big gains there.

As far as the motherboard, you can get a very nice one for about $140. That will have a pair of PCI-e 3.0 lanes (won't work as 3.0 without an IVB processor though) and USB 3.0. You aren't going to find those features on a $100 board.
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February 17, 2012 4:11:09 PM

alvine said:
the cheapest 1155 motherboard is $120, 2500k is $230, 8gb of ram is $50

bf3 is gpu intensive, you will need a 7950 to max that game out.


So I need to change the ram too D:? Also is 4 MORE gb needed now? I guess it's not that big of an issue.

Oh and 7950 to max it out, i'm sure there is nothing i could not max out with 2 6870's right?
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February 17, 2012 4:13:19 PM

willard said:
I'm not sure about BF3, but Skyrim is hungry for more CPU power. Switching from AMD to a 2500k will get you big gains there.

As far as the motherboard, you can get a very nice one for about $140. That will have a pair of PCI-e 3.0 lanes (won't work as 3.0 without an IVB processor though) and USB 3.0. You aren't going to find those features on a $100 board.


What is pci-e 3.0 for? compared to 2.0 i mean.
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a c 229 U Graphics card
February 17, 2012 4:13:56 PM

Microstutter is primarily an issue in the market segment under $200 per card and more so with AMD cards than nVidia's if ya read the THG article on the subject. 2-way CF works pretty well since the 5xxx series....tri-fire ? not so much.... according to Guru3D's reviews, ya don't wanna go there.

Any of these options work w/ ya 850 watt PSU

Guru3D uses the following games in their test suite, COD-MW, Bad Company 2, Dirt 2, Far Cry 2, Metro 2033, Dawn of Discovery, Crysis Warhead. Total fps (summing fps in each game @ 1920 x 1200) for the various options in parenthesis (single card / SL or CF) are tabulated below along with their cost in dollars per frame single card - CF or SLI:


6870 (434/701) 434 701 $ 160.00 $ 0.37 - $ 0.46
6950 Frozr OC (484/759) 484 759 $ 240.00 $ 0.50 - $ 0.63
560 Ti - 900 Mhz (495/862) 495 862 $ 205.00 $ 0.41 - $ 0.48

-Twin 6870's take yu from 434 fps in the test suite to 701.....at 46 cents per frame.

-Twin 6950's will take you to 759 fps at 63 cents per frame.

-Twin factory OC'd 560 Ti's will take you to 862 fps at 48 cents per frame.

Given you already have the one 6870, the easiest upgrade path is getting one more.

Son No. 3 has the twin factory OC's 560 Ti's and plays BF3 single player on ultra .... multi player has issues and has to be played on high.
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February 17, 2012 4:19:14 PM

JackNaylorPE said:
Microstutter is primarily an issue in the market segment under $200 per card and more so with AMD cards than nVidia's if ya read the THG article on the subject. 2-way CF works pretty well since the 5xxx series....tri-fire ? not so much.... according to Guru3D's reviews, ya don't wanna go there.

Any of these options work w/ ya 850 watt PSU

Guru3D uses the following games in their test suite, COD-MW, Bad Company 2, Dirt 2, Far Cry 2, Metro 2033, Dawn of Discovery, Crysis Warhead. Total fps (summing fps in each game @ 1920 x 1200) for the various options in parenthesis (single card / SL or CF) are tabulated below along with their cost in dollars per frame single card - CF or SLI:


6870 (434/701) 434 701 $ 160.00 $ 0.37 - $ 0.46
6950 Frozr OC (484/759) 484 759 $ 240.00 $ 0.50 - $ 0.63
560 Ti - 900 Mhz (495/862) 495 862 $ 205.00 $ 0.41 - $ 0.48

-Twin 6870's take yu from 434 fps in the test suite to 701.....at 46 cents per frame.

-Twin 6950's will take you to 759 fps at 63 cents per frame.

-Twin factory OC'd 560 Ti's will take you to 862 fps at 48 cents per frame.

Given you already have the one 6870, the easiest upgrade path is getting one more.

Son No. 3 has the twin factory OC's 560 Ti's and plays BF3 single player on ultra .... multi player has issues and has to be played on high.


Thanks!
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a b U Graphics card
February 17, 2012 4:19:43 PM

Guildwars2fan said:
What is pci-e 3.0 for? compared to 2.0 i mean.

PCI-e 3.0 gives you double the bandwidth of 2.0. No current card even comes close to maxing out 2.0 and all revisions of PCI-e are compatible with all others, so there's really no benefit yet. It's a future proofing thing.
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February 17, 2012 4:20:00 PM

One question then, if I decide to wait a little bit and buy the Mobo/Proc/Crossfire,

what should I know when installing 2 cards? Driver wise? Option wise? thanks!
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February 17, 2012 4:38:04 PM

So I've decided on that mobo, ASRock Z68 Extreme3 Gen3 , everyone calls it amazing and has won awards and its just 122, look at its details and be amazed.

i'll just go crossfire, 15 fps gain just isint worth it when you can buy another cheap video card and get a 98% increase!

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a b U Graphics card
February 17, 2012 5:38:13 PM

I'd probably pay the extra $20 to get a board with USB 3.0 headers. Without them, front mounted USB 3.0 ports will not work.

Aside from that, it's a good board.
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a c 125 U Graphics card
February 17, 2012 7:39:41 PM

Before you go spending money: In Skyrim, download Skyboost http://forums.bethsoft.com/topic/1349813-skyboost-topic...

With your CPU you should see some gains for sure.

Crossfire 6870s would kick ass, but the only thing is that the 6800 series seem to be prone to micro stutter, moreso than other radeons. My 5850s never stutter, but they are a different tech. Anyway, a single 6950 is a really good card.

As for upgrading your CPU and mobo to an Intel, there's not a huge amount of reason to worry about 16x/16x compared to 8x/8x. Just adds a lot to the cost. Most of the Z68 boards have USB3 and Sata 3 already.

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February 19, 2012 3:31:20 PM

Would my system as of now, bottleneck a 6950? would my fps increase in battlefield 3 by 15-20 with a 2500k?
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a c 125 U Graphics card
February 21, 2012 2:01:18 PM

Well your CPU unlocked to quad and at 3.6ghz should be pretty good. Definitely won't bottleneck a 6950 in most cases. BF3 multiplayer on 64 player maps can be very CPU demanding, but I wouldn't upgrade the CPU just for that. In most cases the CPU should be fine.

I'd say upgrade when you have the cash to spend, but don't really worry about it for now. A GPU upgrade first would be most useful.

A 2500k is definitely a lot faster than what you have, but there's no rush to upgrade like I said, and by the time you probably need to at the very least Ivy Bridge will be out.
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February 21, 2012 5:08:50 PM

Thanks Wolf, I'll just wait then 'till mid-march to upgrade mobo and proc, thanks!
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!