Tom's Hardware > Forum > Graphic & Displays > Graphics Cards > SLI & Crossfire

SLI & Crossfire

Forum Graphic & Displays : Graphics Cards - SLI & Crossfire

Tom's Hardware: Over 1.4 million members in 6 different countries available to answer all your high-tech questions. Sign up now! Its free!
Ask the community Add a reply
Word :    Username :           
 
Rwayne   10-08-2007 at 05:51:52 AM

Is it true that SLI and Crossfire will only work in games designed for SLI or Crossfire? I was considering buying a 2nd Video card, but if I am only going to experience a performance increase just in games designed for SLI or Crossfire then I don't want it.

I rather upgrade to a better card so I will get a good performance increase in all games.

Add a reply
Sponsored Links
Register or log in to remove.
emp   10-08-2007 at 05:57:05 AM
- 0 +

SLI and Crossfire can work on maybe 90-95% of the games, however the performance boost you get is not set in stone, it depends on the drivers and game engine. Dual card setups are NOT for anything less than top-of-the-line cards (i.e. 8800GTX, not GTS), they are an incredible waste of money and electricity otherwise. I would only run a dual card setup if you were on a big display (1920x1200 or bigger) that needs a lot of raw power to keep it running smoothly (And no, 20-40 fps with a single GTX is not smooth despite what some may believe).


Message edited by emp on 10-08-2007 at 05:57:40 AM
------------------------------ Anxiously awaiting the Hydra 100 and the Hydra Engine...
www.lucidlogix.com
 Reply to emp
Rwayne   10-08-2007 at 06:07:22 AM
- 0 +

I need some more horsepower for my system. I was playing C&C3 tonight and I had Lag in heavy battles with my X1950GT while my friend I was playing against had zero lag with his 8800GTS 320MB card.

I think that would indicate a my video card was not keeping up. Because if the problem was with the internet connection it would slow his game down also in order to sync with mine. On my side I noticed the frame rates dropped way down then after an intense battle was over the FRAPS jumped way back up.

I thought about pairing my X1950GT, but then again I may wait for the HD 2950 Pro based on it's great preliminary reviews and energy efficency. It would cost me about an extra $100, but I may have to go that route.

Reply to Rwayne
Rwayne   10-08-2007 at 06:10:42 AM
- 0 +

Does anyone have any Crossfire success stories?

Reply to Rwayne
emp   10-08-2007 at 06:28:52 AM
- 0 +

Crossfire is less constant than SLi as far as average performance goes, sometimes it can perform wonderfully well, others... not so good. I would recommend you to either buy the current HD 2900 Pro which are just "failed" R600 running at a lesser clock speed, benching in really close to the XT and sometimes losing and sometimes outperforming the GTS 320 (Depending on the test) or getting a 8800GTS. You could also wait for the 8800GT and HD 2950 Pro, but in my eyes it's not worth it, at all.


Message edited by emp on 10-08-2007 at 06:31:22 AM
------------------------------ Anxiously awaiting the Hydra 100 and the Hydra Engine...
www.lucidlogix.com
 Reply to emp
Rwayne   10-08-2007 at 06:31:53 AM
- 0 +

Quote :

You could also wait for the 8800GT and HD 2950 Pro, but in my eyes it's not worth it, at all.


Why do you say that? The 8800GT is understandable because it is not direct x 10.1 compatible. But why not the HD2950Pro?

Reply to Rwayne
emp   10-08-2007 at 07:12:03 AM
- 0 +

Because performance is definitely not going to be huge leap over the current existing hardware if any leap at all, on top of that pricing won't be all that attractive over what we currently have, all in all if you're in the market for a graphics card now, then now it's the time to buy, if you happen to need one after those are released, then you can consider those but waiting for a card that isn't going to revolutionize or be priced aggressively over what we currently have isn't worth it.

DX10.1 is not all that it's cracked up to be, nothing worth losing any sleep over, by the time those features are properly implemented we will be seeing even more powerful hardware that will take advantage of it properly. Ati is trying to support future technology that at some point will be used, but for the foreseeable future I don't see it as a true selling point.

------------------------------ Anxiously awaiting the Hydra 100 and the Hydra Engine...
www.lucidlogix.com
 Reply to emp
strangestranger   10-08-2007 at 08:13:27 PM
- 0 +

as emp says some games are supported others aren't. I don't know how the latest drivers work but a notable exception is company of heroes. Crossfire does not work.

however, when it does work, it's great as in oblivion where 80-100% more frames are not unusual.

still that is the extreme and more often it may only be 50% more frames depending on resolution and how demanding the game is.

Still, it is best to research the games you have as although most new games are supported some older ones may not be but then again, you porbably don't need the performance boost there.

However, if you can afford a second card of the one you have got, it might be best spending a little more for a single card which will gaurantee the same performance.

one final thing, as C&C3 is a rts it is not usually gfx card's that are the problem. I haven't played it but are you sure your friend does not have a faster cpu that is helping. Your cpu is no slouch but what cpou does your friend have.

------------------------------ I'm a git, deal with it.

Antec 1200,PC Power & Cooling 750,Gigabyte DS4-x48,Intel Q9550@3.4 W/Xigmatek S1283,8GB OCZ DDR2 800,ATI 4870X2,X-FI>CA 640C amp>Tannoy R300/Senn 595's
 Reply to strangestranger
joewho   10-08-2007 at 08:40:33 PM
- 0 +

The question is not that simple.

1. do you have a SLI or Crossfire Motherboard?

2. Can your PSU handle dual GPU'S

3. How much money do you want to spend.

In most cases your better off with a single GPU, unless your loaded or have a 24" or larger display.

Best buy on a GPU today is the 2900PRO 1GIG at $340.

Reply to joewho
Rabidpeanut   10-08-2007 at 10:56:18 PM
- 0 +

Wait until the 9800 comes out(nvidia finally catching up to ati eh... ;) ). seriously, if it is as soon as they say then you can make it until then, then pick up an hd2950 for peanuts. If you can get a 2900xt for cheap get it cause it is one heck of a card.

Reply to Rabidpeanut
Ask the community Add a reply
Tom's Hardware > Forum > Graphic & Displays > Graphics Cards > SLI & Crossfire
Go to:

There are 550 identified and unidentified users. To see the list of identified users, Click here.

Forum map
Bestofmedia Forum ©
2000-2009 Bestofmedia Group
Page generated in 0.313 seconds
Please mind

You are about to answer a thread that has been inactive for more than 6 months.
If you still wish to proceed, please ensure that your posting is original and does not duplicate or overlap any prior responses to this thread.

Add a reply Cancel
Sponsored links
  • Ask the community now
  • Publish
Ad
Related Topics
See all relatives topics
They won a badge
Join us in greeting them
How do I win badges?