will crossfire work like this???

[warmerplace212]

i got a r9 380 from asus but the 2 gb version and you have a 4 gb but i am thinking if i buy the 4 gb version put it in the number 1 slot and my 2 gb in the slot number 2 will it still work because of the different vram i know with amd you can crossfire with something like a r9 390 but will it work with the same card only higher vram????

[ShadowCaptain]

1 minute ago, warmerplace212 said:

i got a r9 380 from asus but the 2 gb version and you have a 4 gb but i am thinking if i buy the 4 gb version put it in the number 1 slot and my 2 gb in the slot number 2 will it still work because of the different vram i know with amd you can crossfire with something like a r9 390 but will it work with the same card only higher vram????

It would limit both cards to 2gb

best to sell the first card and buy a new card

[warmerplace212]

so it really has to be the same vram is one is lower it will take that vram or am i right??

[JPotze]

it will match the size and speed of the smallest and slowest of the set. i would recommend not doing it and buy 2 of the same cards for optimal performance.

[warmerplace212]

so just buy a new one or sell my old for a x version or 4gb i think i should sell my old one or safe money for the x version and keep the 2gb for another system maybe 

 

ow en JPotze ik hat niet gedacht dat er ook nederlanders hier waren je bent de eerste die ik op de forum zie

[Naeaes]

25 minutes ago, warmerplace212 said:

so it really has to be the same vram is one is lower it will take that vram or am i right??

If you want to keep a discussion going, you need to quote a user to address them. There's a button for it below each comment. Otherwise they won't get a notification and will never know that you had something to say.

 

To answer your question, Yes. Basically both cards have the same data stored in their memory. That's why there can only be as much data as the smaller card has memory available. The rest of the memory in the bigger card is entirely ignored and left unused. This applies to all cards and all versions of Crossfire, CrossfireX and SLI too. It also applies to all version of DirectX except, when sometime into the future, fully implemented, the upcoming DirectX 12.

 

If you need the 4GB, your best bet is really to sell the 2GB card and purchase a card that can cope on it's own or two 4GB cards. Albeit, 2GB is plenty for a single 1080p screen.