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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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ElT said:
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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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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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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GoogalyMoogaly said:
This got me thinking, how much do you think a i7 8700K (@4.8Ghz) would bottleneck a 7900 XT at 4K?
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Is it free? :P

I would rather do a more meaningful upgrade if it were me.

You can put together something like a 5600x on an AM4 motherboard for pretty cheap now and that would still be a decent platform for that GPU.

Alternatively, just hold and see how you get on with the GPU upgrade.
 
The OP will be absolutely fine with the 1920 and a 7900xt with pcie 3. Is barely any loss in performance over gen4. Playing at the over 4k res and limited to 60hz you will get a darn good playing experience , especially in a game like WHIII where you do not need uber high FPS. It will look amazing at that res and aspect ratio.

@GoogalyMoogaly - It will not bottleneck that much and the cpu is good for well over 100fps in pretty much all games so at 4k the gpu will still be the limiting factor in some modern titles. The cpu could really struggle if you turn on RT but that card is not the best at RT so keep those setting on the lower side.
 
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rare said:
Is it free? :p

I would rather do a more meaningful upgrade if it were me.

You can put together something like a 5600x on an AM4 motherboard for pretty cheap now and that would still be a decent platform for that GPU.

Alternatively, just hold and see how you get on with the GPU upgrade.
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Well, free as in I've owned it for 5 years...

Haz123 said:
@GoogalyMoogaly - It will not bottleneck that much and the cpu is good for well over 100fps in pretty much all games so at 4k the gpu will still be the limiting factor in some modern titles. The cpu could really struggle if you turn on RT but that card is not the best at RT so keep those setting on the lower side.
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Thanks. Yeah I wasn't really expecting to use RT much so that's fine.
 
As long as the pcie is running at full 16x your not going to have a problem.

When you upgrade cpu but a pcie 4 board.
My gpu is only pined to 8x and its in a pcie 3 slot and I have zero problems.

I don't think a 7900xt would use are the pcie 3 x16 bandwidth.
I assume you playing at 4k in that case cpu problem not gpu.
Or if your at 1440 again cpu problem not gpu.
 
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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ElT said:
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.
Click to expand...
Download msi afterburner you can monitor all aspects with it.
 
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