Hardware upgrade?

[otterfat]

This question is indirectly related to modding.

 

I currently have two 670 GTX FTW 2gb. I have heard 2 gb is not enough for modding Skyrim when it comes to high res modding.

 

If I sell the two 670's and buy a 770 or 780 with 3-4gb, will I still push the same fps? I hear Skyrim does not take advantage of sli very well so I am rather tempted to switch out as I ONLY play Skyrim

 

EDIT: I failed to mention I am playing on a QNIX 1440p monitor at 2560X1440. One from QNIX.

[Salvinha]

That's right, Skyrim does not take significant advantage in Sli or Crossfire (when we talk about FPS), it has about the same FPS with one card only.

Regarding the memory, your SLI is quite good for high resolution and 2k/4k texture mods, and yes, the memory is used in both cards regardless of SLI or not, it will avoid a lot of CTDs. My last videocard was an AMD HD 6950 2GB and I could run 2k textures with no problem, of course in 1280x1024, now with my HD 7950 3GB, I can run the same 2k textures + enb in 1920x1080 ultra settings and get a very good FPS with no CTDs. Assuming the GTX 670 and HD 7950 have the same perfomance (losing in some tests, winning in others), you are very good for now because you have two GTX 670 and a total of 4GB VRam. But if you got the balls to change it, it is yout choice.

[deathneko11]

Actually, you only have 2GB between those cards. the vram is not added between them, but mirrored instead. If you break 2GB in your vram useage from your mod list, then you will crash. Performance wise you are looking good but imo the only benefit to upgrading will be the extra vram for more high res textures.

[otterfat]

That's what im interested in. If I am playing at 1440p should I consider bumping up my vram?

[Salvinha]

Actually' date=' you only have 2GB between those cards. the vram is not added between them, but mirrored instead. If you break 2GB in your vram useage from your mod list, then you will crash. Performance wise you are looking good but imo the only benefit to upgrading will be the extra vram for more high res textures.[/quote']

Oh yes, I'm sorry, it is it right, I was saying ********, I saw once in Nexus there were some ENB tweaks where you could do some improvise, and put the total memory, but that is another thing. Sum memory of two different GPUs is impossible, because of technological issues.

SLI and CrossfireX alternate frame rendering, which makes your gpus work in turns. The two cards copy or mirror the vram so they can synchronize. If something is being processed in the second GPU, it needs to return for the first GPU at the same memory location. If both have independent memory control, we may have issues where accidentally overwrite the data when exchanging data.

It is also for dual cards, their memories are mirrored for the second gpu and they do not communicate with each other. They use a PCI-E bridge in-card. So, for the computer, they are two different cards, with separated memory and separated management.

For sure AMD and NVidia must to be working on a way to solve this problem, but they didn't say anything yet.

But as a colleague said once: "A single GPU is much better. Spending money in Crossfire/SLI or Dual Cards is stupidity."

At first hand I didn't believe him, but now I do.