R9 270x crossfire/sli

[Innocent159]

Hey I want to know what happens if I crossfire/sli my Sapphire R9 270x vapor OC 2Gb with a R9 260 1GB? Do i get a vram of 3Gb?
Will my performance increase or decrease?

And is the best option to sli/crossfire your card with the same type of card (vram, model,etc) or better

 

[Excalabur50]

If you can it's always better to match your cards and the vram won't increase with the number of cards you have if your card is 2Gb then it will be 2Gb not 4 if you have two the same so yours wont equal 3Gb it will be 2

 

[YouWhat]

Not a lot, you won't get X-fire to work as the core GPUs are different, they both need to be either 260s or 270s, and no, even if it did work that way, you would still only get 1GB VRAM, the other card would possibly be utilised by mantle or something like (although I could be wrong about this, I am unsure as I haven't used a AMD GPU in quite a few years), and your chipset would go for the lowest of the cards and they would sync up to that speed for the GPU and VRAM eg your 270 would run at your 260 speeds with only 1GB of VRAM used, and the same speed it ran at also.

Basically, they cards work in parallel not series, so the other one is used to offload some of the processes they have to compute, so the VRAM remains the same total.

 

[Innocent159]

Not a lot, you won't get X-fire to work as the core GPUs are different, they both need to be either 260s or 270s, and no, even if it did work that way, you would still only get 1GB VRAM, the other card would possibly be utilised by mantle or something like (although I could be wrong about this, I am unsure as I haven't used a AMD GPU in quite a few years), and your chipset would go for the lowest of the cards and they would sync up to that speed for the GPU and VRAM eg your 270 would run at your 260 speeds with only 1GB of VRAM used, and the same speed it ran at also.

Basically, they cards work in parallel not series, so the other one is used to offload some of the processes they have to compute, so the VRAM remains the same total.

So there is no basic increase for going for a card lower than what you have. Now I want to know what is the reason for crossfiring a R9 270x with a R9 280 (both 2gb vram)

If you can it's always better to match your cards and the vram won't increase with the number of cards you have if your card is 2Gb then it will be 2Gb not 4 if you have two the same so yours wont equal 3Gb it will be 2

So there's no actual benefits for crossfiring?

 

[YouWhat]

So there is no basic increase for going for a card lower than what you have. Now I want to know what is the reason for crossfiring a R9 270x with a R9 280 (both 2gb vram)


So there's no actual benefits for crossfiring?

Yes there is, its the parallel processing that is the benefit, the basic principle is same as SLI (check out the ROG Striker video that Tom did to see the difference between single and dual card performance, as this video highlights the benefits from it very well).

 

[Innocent159]

Yes there is, its the parallel processing that is the benefit, the basic principle is same as SLI (check out the ROG Striker video that Tom did to see the difference between single and dual card performance, as this video highlights the benefits from it very well).

Does that apply for all situations (crossfire r9 270x and 260 or 280)?

 

[YouWhat]

The performance gains will happen with all the X-Fire setups, no mater whether its a 260 or 280 or even 290s.

As to the performance gains you get, it depends on your hardware, drivers, ambient temperature (cards will tend to throttle at higher temps) along with the silicon lottery.

 

[Innocent159]

The performance gains will happen with all the X-Fire setups, no mater whether its a 260 or 280 or even 290s.

As to the performance gains you get, it depends on your hardware, drivers, ambient temperature (cards will tend to throttle at higher temps) along with the silicon lottery.

Oh and i'm sure they need alot of power?

 

[YouWhat]

Oh and i'm sure they need alot of power?

Yes, it is double what the single card would be. Mine on single card pulls about 450W from wall (That is the complete system, not just cards and running it balls to wall), but "the twins", they pull between 650 and 700W at full load when they are getting punished

 

[Innocent159]

Yes, it is double what the single card would be. Mine on single card pulls about 450W from wall (That is the complete system, not just cards and running it balls to wall), but "the twins", they pull between 650 and 700W at full load when they are getting punished

It feels nice to have all that power. I can't wait for my turn

 

[tinytomlogan]

Actually the other card will only use 1gb of its available Vram - you need to crossfire with a matching pair really.

 

[Innocent159]

Actually the other card will only use 1gb of its available Vram - you need to crossfire with a matching pair really.

Thanks for the reply. (wish i had a sig really)=00=

 

[JR23]

Thanks for the reply. (wish i had a sig really)=00=

It's not acceptable to reference your signature in a post. One day it will change and the thread will become useless.

+1 to what everyone else says though it only makes sense to combine identical (GPU and memory) cards. Throwing in an Asus and a Gigabyte doesn't really matter other than looking fugly.

JR

 

[Innocent159]

It's not acceptable to reference your signature in a post. One day it will change and the thread will become useless.

+1 to what everyone else says though it only makes sense to combine identical (GPU and memory) cards. Throwing in an Asus and a Gigabyte doesn't really matter other than looking fugly.

JR

True you got a point but i was just trying to find out if i can have 4gb vram or what do x-fire provide

 

[tinytomlogan]

Basically if you cant post your specs we cant post replies.

 

[Innocent159]

Basically if you cant post your specs we cant post replies.

MSI H97 gaming 3, i5 4460 3.2ghz, Sapphire R9 270x 2Gb oc, 1Tb WD blue 7200rpms, 550Watt Thermaltake active series.
want to play up and coming games (gta v, FC 4) at 60fps at medium or high setting

 

[YouWhat]

MSI H97 gaming 3, i5 4460 3.2ghz, Sapphire R9 270x 2Gb oc, 1Tb WD blue 7200rpms, 550Watt Thermaltake active series.
want to play up and coming games (gta v, FC 4) at 60fps at medium or high setting

With those specs, you should be able to play the up and coming games on medium settings, although you might not make 60fps, the screen resolution will also be a big factor in the FPS count (until they are released, there are no guarantees and nobody can really answer that).

 

[Innocent159]

With those specs, you should be able to play the up and coming games on medium settings, although you might not make 60fps, the screen resolution will also be a big factor in the FPS count (until they are released, there are no guarantees and nobody can really answer that).

OKay thanks. the resolution is 1920x1080. 1080p for now