/tech/ - Technology★

The jews are at fault!

>wondering why pci 3 and 4 x16 connections are not typically saturated in games.

Saturating them would bottleneck performance.

Only way to solve the bottleneck would be with a new motherboard, which is expensive, tedious to install, and might be incompatible with some of the user's hardware (see DDR formats) thus requiring further upgrades: overall, a pretty unpleasant option.

On the other hand, it's relatively cheap to make PCI connections that will never saturate under normal use.

Based on egpu studies they don't typically saturate pci 3 x8 so it seems there is a lot of extra bandwidth there before performance would be affected.

I'm not sure what you would want to saturate the bus with in the first place. The raison d'être of accelerated graphics is making graphics processing as fire and forget as possible.

The bottleneck is the GPU. It simply can't process enough data to saturate more than 10 or so lanes, even with the most compute power possible in a cutting edge GPU.

You'd need 600W or so of power and twin GPU dies to hope to saturate 16 lanes at 3.0 speeds. It's just not possibe to design a card with that level of compute at this time.