[SOLVED] Maximum Graphics Card for a PCIe 3.0 x8 Platform

ManOfArc

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Jul 8, 2017
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I've been wondering just how much low-end AMD boards like the 320A or 420A suffer (if any) by only having an 8-lane PCIe 3.0 interface. So, my question is:
Assuming sufficient system RAM and V-RAM, and coupled with a powerful CPU... what would be the highest-end graphics card one would logically use gaming at 2560x1440 resolution? Also, assume the gamer preferred using the highest possible graphical settings over getting the highest possible frame rates.
 

Ak47Egy

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Jun 4, 2016
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Theoretically speaking you can get an RTX 3090 to work fine on a PCIE 3.0 MOBO, yes you'll be at a bit of a bottleneck, but considering that it has 24GB of VRAM, your bigger worry would be pairing it with a powerful enough CPU, that'll be the bigger bottleneck here not PCIE 3.0
 

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