PCI 3 x16 vs x8 DCS performance

Hello,

I'm soon building a new rig based on a i9 9900K / RTX 2080ti :) But here's my question: I know that DCS only properly support one GPU. But for other stuff I'll need to do with my rig, I might be running a dual GTU set up ( i.e. 2 x RTX 2080ti). But here's the thing: on the MOBO I'll be using (asus ROG Maximus XI hero) a dual GPU setup only has bandwidth of x8 per GPU (vs. x16 if I was only using one GPU). Would that make a difference in performance for DCS? In most benchmarking I saw so far, there seem to be little very little difference between x16 and x8.

What are your thoughts ? :helpsmilie:

Best

Karim

Perhaps not by much at least, although would need to factor in how much more your 9900K will feed the GPU(s) it's a shame the CPU only has 16 lanes.

tests PCIe laneways for GPU HTH

The new Ryzen will feature PCIe v4 with double the bandwidth...and...PCIe v5 is about to be signed and implemented too from what I read. So PCIv4 will only be there for so long.

Perhaps not by much at least, although would need to factor in how much more your 9900K will feed the GPU(s) it's a shame the CPU only has 16 lanes.

 

tests PCIe laneways for GPU HTH

Thanks. Actually most of the test I have seen was with the 1080ti. Difference between x16 and x8 was typically less than 1% in terms of game fps. The 2080ti seems to have a bigger impact but still <3%.

v4 and v5 are not for present gaming GPU's but mainly for GPU's in scientific research and to boost storage further up the ladder. Those SSD's scream for more bandwidth harder than a GPU does imho.