GTX970m SLI 6GB vs GTX980m 8GB

Support Technical Support
1

Hi everyone,

I was wondering what hardware would give me better results in terms of rendering speed:

2 gpus with 3gb each (970m SLI) or 1 gpu with 8gb (980m)? Im aware that having two gpus might be a better choice from what i have read before but i was wondering if anyone would know the difference when it came to the RAM as well. Is more ram better than having more gpus?

I wanted to get a laptop to focus on learning blender and i cannot make up my mind between the gigabyte p37x (980m) or the aorus x7 pro (970m SLI).

2

Blender does not use SLI for multiple gpus. If you enable it the performance may be worse that if SLI was disabled.
When you 2 x gpus each with 3GB ram, the total useable RAM will still be 3GB not 6GB

3

All right thanks a lot for the reply! But just for clarificaiton, even without sli will blender use the two gpus but not take advantage of all ram available?

4

Hi, VRAM is not added.
If you have 3 4 GB cards Cycles can use only 4 GB for render.
Cycles use all cards to render in your system.

Cheers, mib

5

All right guys, thx for the info, really appreciate!