Question How do the 50 series graphics cards perform on a PCIe 4.0 motherboard ?

[maillet]

PC Specs
CPU: AMD RYZEN 7 5800X3D
CPU Cooler: DeepCool AK620 DIGITAL WH
Motherboard: GIGABYTE X570 AORUS MASTER
RAM: 2 x 16GB Corsair Vengeance RGB PRO SL @ 3200Mhz
Graphics card: Gigabyte Geforce RTX 4080 Gaming OC 16G
SSD 1: Samsung 990 PRO 2To - M.2. NVMe
SSD 2: Samsung 990 PRO 1To - m.2. NVMe
Case : NZXT H7 FLOW RGB, with 6 140mm fans NZXT RGB
Power supply: Corsair RM1000x Shift, 1000W

 

[Lutfij]

You own an RTX 4080, you don't need to look at the RTX 5000 series. Not with the amount of money you're going to spend for a minimal upgrade(if this is for gaming), not to mention the mess that is Nvidia's driver department.

 

[maillet]

Yes but I just want to know because the 4080 doesn't fully exploit the PCIe slot

 

[maillet]

at what point will a 50 series card over exploit the pci-e 4.0 slot

 

[dark_globe]

not any time soon , as you can see even rtx 5090 doesn´t take any hits at pcie 4.0 x16 speeds
and even at severely reduced speeds like x8 4.0 pcie or 16x 3.0 pcie it only takes a 2-4% hit .

significant drop in performance only occurs in unrealistic scenarios .
(nobody will buy rtx 5090 and put it in an archaic pcie 2.0 slot or to a reduced x4 pcie 4.0 slot .
even than its only 10% .

 

[beyondlogic]

In short the pci 5.0 for these cards are just fluff they work fine with zero performance loss.

 

[DSzymborski]

I can't imagine many realistic scenarios in which a GPU owner, in typical use cases, has to seriously worry about PCIE bandwidth with a high-end GPU. There are certainly edge cases in which there could be some difference (see the RX 6400 and 6500 XT, which struggled due to being able to utilize only four PCIE 4.0 lanes), but I doubt anyone is considering pairing an RTX 5090 with, say, one of those old AMD Phenom II Black CPUs, for any reason other than curiosity.