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dc_todd
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 Posted: Wed May 07, 2008 8:57 am Post subject: Running ATI 3870 GFX cards in crossfire. Now Benchmarked |
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Hi guys, prolly a stupid question, there are heaps of onsellers of ATI and nVidia cards out there.
I currently have a Gigabyte 3870 GFX card, I am looking at a crossfire setup, I know I need to keep the card the same, but do I need to keep the onseller the same as well? Ie 2 gigabyte cards? or can I go a gigabyte and a HIS card as long as the 3870 chipset remains the same?
I know its probably a dumb question, but I thought one worth asking before spending $$ on a second GFX card.
Ultimatly I will probably end up purchasing a dual pack, and selling my exsisting card (about 1 week old!)
But would like to know will a Readon and Gigabyte card work together?
If your gonna offer a comment and a snide remark, don't bother, I just want a straight answer.
Last edited by dc_todd on Mon May 12, 2008 10:15 pm, edited 1 time in total |
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TURBO_GHIA
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| Posted: Wed May 07, 2008 5:37 pm Post subject: |
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| yeah im in the same boat ,id like to know this as well . |
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MMD
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| Posted: Wed May 07, 2008 6:01 pm Post subject: |
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Crossfire you can run any brand together
You must run same Chipset - But this does not limit you to just a 3870.
You can run a 3870 with a 3850, or even a 3870x2 with a 3870/50.
edit:- here is a link to a 3870x2 and 3850
http://www.xtremesystems.org/forums/showthread.php?t=185933
plenty of info on that forum. |
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dc_todd
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| Posted: Thu May 08, 2008 12:16 am Post subject: |
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I was also under the impression that same mainboard series could be run this way, the clock speeds would be adjusted to suit the slower of the 2 boards in crossfire.
Just to be sure though, thought I would double check..
Cheers |
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dc_todd
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| Posted: Thu May 08, 2008 12:57 am Post subject: |
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ok, my next question is this..
I am currently runnibg a thermaltake tough power PSU 750w with cable management, SHOULD this PSU have enough balls to power the 2 cards in crossfire? other items runnibg off the PSU are Q9450 CPU 2 HDD 1 dvd writer, 8 usb's ( 4 still free ) 4 case fans and CPU cooler, not heaps I would imagine.. I think this PSU would well be up to the task of powering all this + the addition of 2 cards in crossfire..
Yes? |
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scottlah
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| Posted: Thu May 08, 2008 1:17 am Post subject: |
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If it does it will be borderline.
Also take it from someone whos actually used crossfire. Its s**t, its not all its cracked up to be.
Its not like thinking wow ill get double the peformance because i have to. Its like 30% MAX in a perfect enviroment and i would no suggest it. Id sell the card and spend the money you were going to spend on buying one awsome card.
my 2c |
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dc_todd
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| Posted: Sat May 10, 2008 1:43 pm Post subject: |
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OK now running 2 3870's in crossfire.. Scottlah, I dunno what you did wrong but crossfire is gutloads better. while I agree performance is not doubled, it is close to 60%, then with a slight tweek on overclocks you can get damn close to 100% I ran it through 3dmark pro, I will have to post some figures later when I am at home, but I was very impressed. Maybe you had an early gen card that could not push hard or take advantage of crossfire to well?
Also, I did spend the money buying 2 awesome cards. these things push harder than 8800GTS's each card is 512mb with ddr3 ram, better FSB speeds and lower latency.
i have looked at Nvidia stuff in SLi and do not rate it compared to these. |
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MMD
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| Posted: Sat May 10, 2008 5:56 pm Post subject: |
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Your PSU is plenty for your system even with a good over clock on it
I run a 3870 and a 3850, noticeable performance increase in games that support it
my system is older than yours - 965-dq6 (has 2 PCI-E slots but one is 16x the other is 4x) so i am getting less bandwith to the second card.
To be honest a single 3870 was enough for my gaming needs but a 3850 cost me 120 delivered i couldn't pass it up. |
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scottlah
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| Posted: Sun May 11, 2008 2:33 am Post subject: |
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Yeah post some 3dmarks please.
That is really interesting to see that as ive never seen an increase that high before. |
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dc_todd
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| Posted: Mon May 12, 2008 6:31 pm Post subject: |
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I'll post these up tonight, just getting SP1 for vista right now.
Plus its my wedding anniversary today as well, so don't scream if they are not u, but i will do my best.
Off the top of my head, with only one card the GFX side of things was hitting about 3100 with #dMark Vantage..
Will re run and post a screen dump soon. If I am allowed |
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dc_todd
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| Posted: Mon May 12, 2008 10:23 pm Post subject: |
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ok, benchmark has been done, as mentioned, with a single card this setup benched at about 3100 for GFX, with 2 cards running in crossfire absolute stock clock settings, it benched at 5800, so a pretty good gain, however its the one below i am proud of, these results were achived with only a mild overclock of the GPU and STOCK CPU, good I love a good quad core.
for the most part I actually do not run crossfire, in vista, i use a multi screen setup, 3x17" monitors.
but for gaming, crossfire... it kicks a**!!
one of the main things I have achived with the crossfire setup is getting more than 100% gain from it. best result I achived with simialer OC settings was 3300 or there abouts, I am sure with a bit more tweeking, I can push this setup to achive double that score.
Needless to say, i am very impressed with the setup. |
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MMD
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| Posted: Mon May 12, 2008 11:18 pm Post subject: |
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if you have not already check out the Matrix Triple Head to go.
allows you to game over 3 monitors. |
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scottlah
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| Posted: Tue May 13, 2008 7:29 am Post subject: |
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| Thats pretty impressive. So is this with crossfire or the newer crossfirex? |
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dc_todd
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| Posted: Tue May 13, 2008 8:10 am Post subject: |
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yeah this is crossfireX this is also the first card from ATi that was purpose built for vista, also runs directX 10.1
I could achive even higher speeds, but I can't really be bothered with overclocking for now, I more wanted to achive quick and reliable compared to outright speed, I have seen some results from people running similar setups and getting MASSIVE figures, I am happy to have have plenty of lazy power on tap and a pc that is capable of running the current stuff for the next few years without constant updates, I don't mind buying small stuff here and there but now I have the base setup, everything else should flow smoothly. |
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scottlah
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| Posted: Tue May 13, 2008 2:55 pm Post subject: |
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Cool
thanks for the info bud  |
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