Posted November 8, 2023 i might have to go into bios once my backup is completed but GPU is running at Gen4x8 which i understand to be Gen 3x16 speeds anyways so I'm unlikely so soo any performance loss, seems like my MOBO splits the PCIE lans and i need to change it to PCH if possible but will the 6900xt see any gains from Gen4x16 Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted November 8, 2023 When using Gen 4, a x8 connection is not going to make a meaningful difference for any GPU on the market. Even the RTX 4090 doesn't see a meaningful difference in performance with that amount of bandwidth - it's around 5% in some cases, but usually shows no difference. Gamers Nexus found a single example early in the 4090's life of a 14% difference, but it may have been driver related - they never followed up as far as I know. So for your RX 6900XT, the answer is: it will almost certainly make no meaningful difference. If it does, it's probably within 5%. Maybe there's some random outlier game that's a bit more, but that's unlikely. Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted November 8, 2023 13 minutes ago, tjrose91 said: i might have to go into bios once my backup is completed but GPU is running at Gen4x8 which i understand to be Gen 3x16 speeds anyways so I'm unlikely so soo any performance loss, seems like my MOBO splits the PCIE lans and i need to change it to PCH if possible but will the 6900xt see any gains from Gen4x16 Nothing you'd notice, but maybe by 1%. Noting the RTX 4090's bandwidth requirement is substantially higher, so an extreme example. NVIDIA GeForce RTX 4090 PCI-Express Scaling - Relative Performance | TechPowerUp Ryzen 7950x3D Direct Die NH-D15 RTX 4090 @133%/+230/+500 Builder/Enthusiast/Overclocker since 2012 // Professional since 2017 Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted November 8, 2023 I had a mobo that for whatever reason would not run gpus 4x16, only 4x8. It wasnt from m.2s or other pcie devices either because I tried taking everything out. Anyway I ran a 3070 on it, a 4070 and a 4090 and performance was always good. I will admit that I found it very annoying that I wasnt able to diagnose the problem but outside of that it wasnt a big deal. Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted November 8, 2023 Author 31 minutes ago, YoungBlade said: When using Gen 4, a x8 connection is not going to make a meaningful difference for any GPU on the market. Even the RTX 4090 doesn't see a meaningful difference in performance with that amount of bandwidth - it's around 5% in some cases, but usually shows no difference. Gamers Nexus found a single example early in the 4090's life of a 14% difference, but it may have been driver related - they never followed up as far as I know. So for your RX 6900XT, the answer is: it will almost certainly make no meaningful difference. If it does, it's probably within 5%. Maybe there's some random outlier game that's a bit more, but that's unlikely. i have 4 NVME drives populating the 3 onboard NVME and an adapter for the Boot drive as i wanted the 3x4tb NVME not being on an adapter as idk why one drive died but got it RMA'd, just something i noticed with the 6900xt when i poked around in Wattman, i think the bandwidth for the 6900xt isjust above at 16gbps Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
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