PCIe Scaling: S.T.A.L.K.E.R.: Call Of Pripyat
The latest S.T.A.L.K.E.R. sequel is bandwidth-friendly, with the x8 and x4 slot configurations falling only 6% and 1% behind full 16-lane transfers at the game's lowest resolution.
Increasing resolution shifts the load further away from CPU and PCIe performance, dropping the difference between x16 and x4 to only 3%. A x8 slot offers a performance level within 1% of the x16 slot at 2560x1600.