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PCI-e v4 card on PCI-e v3 board. Performance loss?

Thanks all. So in response to everybody (doh - should have thought to put this in the first post)
CPU: Ryzen 1920 12-Core.
M/board: MSI Meg Creator X399
GPU: Radeon 480
RAM: 64GB, DDR 2800MHz
PSU: Seasonic 850W (I think Platinum, been a while since I've opened it up).
SSD: Well, this is probably a bit bizarre but a WD Black AN1500. I wanted more speed but couldn't afford a PCI-E v4 motherboard at the time.

I'd like to upgrade the rest of the system but because I'm on the wrong side of the motherboard divide now, it'll take a chunk of money to do the whole thing. Perhaps later in the year or early next. I figured I could afford the GPU for now. If it's not going to be hamstrung.
 
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Thanks. Well that's probably good enough, I guess. I don't want to buy something older just so it's not bottlenecked when I plan to upgrade the rest one day. So long as the bottlenecking is more of a "wont win any benchmarks" thing rather than a case of "what's the point in putting it with that system". It'll likely be a year or more before the rest gets upgraded by which point there will be next year's cards I guess? But I'll get a year's use out of this in the meantime and you say it will still be a major step up.
 
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rare said:
It will be a massive step up, what resolution do you play games at? It’s less likely to bottleneck at higher resolutions but it will bottleneck regardless.

The card is still a huge upgrade and will be a great starting point for a future upgrade.
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Ha! Well now there's the question! I have a 5K2K monitor (5120x2160). Don't worry, I don't expect to be playing Cyberpunk at Ultra Detail on it. Plus this monitor is capped at 60Hz. I have another 144Hz 1440p monitor which I shall pull out of the garage, I guess. Though if the new card could run Warhammer Total War 3 on my monster monitor at a modest framerate with passable graphics, that would be pretty fantastic. Imagine the view of the battlefield it would give me.

And fwiw, amazingly I've been able to play Alien: Isolation on the giant monitor enjoyably with the 480. I don't know how and I'm not that technical but it seemed to scale it up to full screen itself and still work okay.
 
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Just a small bump to say the card arrived and I've installed it. Thanks to OC for their usual fast turn around. And this card is insanely powerful. I mentioned the crazy non-gaming, giant monitor I have hooked up for normal work? I just started up Alien: Isolation and switched the resolution to 5120x2160 to see what it was actually like, and it ran it. Okay - wow. Well lets turn the detail up from Medium to Ultra just for the heckedy-heck of it! Still running fine. Don't know what the framerate was. Probably nothing three digits, I'll have to test it properly. But game was perfectly playable. That's crazy.
 
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