crossfire & sli

Baron · #1 05-19-2011, 09:34 AM

U do NOT need a card with 2 gigs vram unless u running resolutions above 2000x..... or multiple screens.

Normal res up to (at least) 1920x1200 does not use more than 1 gigs.

It has been tested by every major site and is a fact.(No differance between a, for ex, Gtx580 1,5 Gig and 3,0 Gig)

Vengeanze · #2 05-19-2011, 09:52 AM

Quote:

Originally Posted by Baron

U do NOT need a card with 2 gigs vram unless u running resolutions above 2000x..... or multiple screens.

Normal res up to (at least) 1920x1200 does not use more than 1 gigs.

It has been tested by every major site and is a fact.(No differance between a, for ex, Gtx580 1,5 Gig and 3,0 Gig)

You sure? Read about someone in this forum that saw that his g-card in CloD used close to 1.5GB. Don't remember his setup and res though.

jayrc · #3 05-19-2011, 01:31 PM

Quote:

Originally Posted by Vengeanze

You sure? Read about someone in this forum that saw that his g-card in CloD used close to 1.5GB. Don't remember his setup and res though.

1+ would like to know if this is true, shouldn't resolution be in sigs

silverstone08 · #4 05-19-2011, 02:06 PM

hi guys i ncat get my crossfire to workj at best it provides a massive perfomance Decrease.! help me it is enabled in the ati control pannel and ive got two of the same card 5750 so why is it doing this?

Thee_oddball · #5 05-19-2011, 09:57 PM

Quote:

Originally Posted by jayrc

1+ would like to know if this is true, shouldn't resolution be in sigs

good point

i take it you got my PM?

jayrc · #6 05-19-2011, 10:18 PM

Quote:

Originally Posted by Thee_oddball

good point

i take it you got my PM?

yes, thank you

Thee_oddball · #7 05-19-2011, 11:01 PM

Quote:

Originally Posted by jayrc

yes, thank you

welllllllll.. tell us what system you have decided to build!

jayrc · #8 05-20-2011, 01:26 AM

Quote:

Originally Posted by Thee_oddball

welllllllll.. tell us what system you have decided to build!

I don't know yet

Bryan21cag · #9 05-19-2011, 10:32 PM

There are pros and cons to both its up to you to figure out which setup is best. It does improve your performance but only if its supported by the software.

I have a 40" viewable Wide Screen TV that i am running Full 1920-1080P HD video on for my monitor and From what I hear it makes a difference at this resolution at this size.

My two personal big issues with this set up are

1. the support for programs is not always available but this is changing i think with a lot of very new Games that i have been buying have this support and the games run phenomenal with it.

2. HEAT. It has been my experience with this rig since its building that by having the two cards inside of this medium size case has added extra heat and used up more room for air flow. If you had a Huge case with more then enough room to leave space between the cards this might not be an issue.

I think that all the newer cards are running hotter and hotter as they get bigger and bigger GPU's on one card but For my next build i think i will go for one Big card in a very large case so that i can maximize the air flow and not have to worry about compatible software.

This said I can not fault the performance at all. Every game with proper crossfire support i have run on this machine FLYS and looks Amazing with every bell and whistle turned on

Good luck

oh and ps....... Dont use the Crossfire/SLI performance of IL2 COD as a marker for weather or not you go with that set up. The support is still not working correctly so there is no way to know yet how this game will run yet when it is correctly fixed and supported.

Cheers

Codex · #10 05-19-2011, 10:51 PM

The resolution actually has a very small part to play in VRAM usage. With a screen res of 1920x1200 and the standard Direct3D colour data type being 32bit you're only using roughly 9MB of Video Ram. Take into account frame buffers for page flipping and AA you'd be hard pressed to use more than 100MB

The biggest issue around VRAM usage is the games content: textures, 3D models etc.