Radeon 7970 3GB or 6GB?

[GPC]

I see there are two versions of this card out, one with 3GB of vram and the other with 6GB. I know there's a thread discussing the performance of this card, but I was wondering if you guys have recommendations or experience with them? About $100 separates one from the other, seems like good value for the money.. I can imagine the higher ram is better for agisoft but can someone confirm this?

Any advice would be appreciated, ready to upgrade ASAP.
Thanks,

[Wishgranter]

6GB only if want/need to work with big meshes = +50 mil tiras and big textures . it will NOT speedup reconstruction process.....

[GPC]

So it's only good for visualization of the data, does not improve processing speed?

Do multiple cards improve any part of the model creation process?

[Wishgranter]

yes, no speedup of reconstruction. Multiple cards improve the DEPHT stage part of reconstruction, its aprox 5-10+ times faster with GPU as just with CPU.... later maybe even MESH creation will run on gpu...