PCIe 3.0 vs 4.0 implications on video card performance?

Intervenator

Member
Aug 26, 2013
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So I've been reading up on PCIe 4.0, and expectations for it are speeds of 32GB/s. The question is, are video cards getting capped by the current PCIe 3.0 interface, therefore making an upgrade to PCIe 4.0 a no brainer? I am trying to decide whether to upgrade now (from Z-77, 3770K to X-99, Broadwell-E) or next year, when PCIe 4.0 is expected to come out. I really can't decide if I will *need* PCIe 4.0 in 2-3 years when I upgrade to the next generation video cards (or the generation after that). Thought?
 

imaheadcase

Diamond Member
May 9, 2005
3,850
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Nope, i can't remember link, but performance for single cards was less than 1% difference between it. As for pascal or future cards? i don't think anyone knows till it happens. Unless we get a huge leap in bandwidth with a certain generation should not be a issue.
 

Intervenator

Member
Aug 26, 2013
117
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So bandwidth will improve, but the impact on performance will be negligible. I assume this upgrade will really only be beneficial for storage upgrades then?
 

TemjinGold

Diamond Member
Dec 16, 2006
3,050
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Do you multi-gpu? It CAN help if you are using like 3-4 gpus at once. If you are like most people and use just 1-2 gpus, you won't feel it.
 

nenforcer

Golden Member
Aug 26, 2008
1,767
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I have a friend who has a Core i5 3570 on a Z77 board and he is going to wait until next year Intel Cannonlake for this very reason - to hopefully get a DDR4 / PCI-E 4 motherboard with possibly more than 4 cores chip for Intel mainstream system.
 

RussianSensation

Elite Member
Sep 5, 2003
19,458
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I am trying to decide whether to upgrade now (from Z-77, 3770K to X-99, Broadwell-E) or next year, when PCIe 4.0 is expected to come out. I really can't decide if I will *need* PCIe 4.0 in 2-3 years when I upgrade to the next generation video cards (or the generation after that). Thought?
Get a better monitor and/or a new GPU if you got $.




https://www.techpowerup.com/reviews/AMD/R9_Fury_X_PCI-Express_Scaling/18.html

If you overclock your CPU to 4.4-4.5Ghz, I'd skip a CPU platform upgrade until Icelake in 2018/Icelake-E in 2019.
 

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