Question PCIe

[GoldGlitch]

what happens if you put GPU PCIe 4.0 in a motherboard whit PCIe 3.0?
is it will work good or ?

 

[DSzymborski]

PCIE is backwards compatible. There are a handful of cases where there are issues, but it's hard to say. It would be better to actually tell us what GPU you're thinking of rather than phrase it as a theoretical. Bandwidth itself won't matter; you basically only lose a couple frames on the most high-end GPUs.

 

[Kona45primo]

If the card has 16pcie lanes, no difference. AMD 6600xt only has 8 lanes and there was concern it would limit performance if used on Pcie 3.0. benchmarks didn't really show much of a difference.

I'm using a 6900xt on a first gen B350 board with Pcie 3.0, I'm sure I'm losing a few fps but it's really negligeable as it performs just fine.

You can do a Google search if you really want to see proof but it's a non issue.

 

[alceryes]

It will work and most of the time you won't see any performance difference.
There are a couple edge cases where less powerful cards, that only run in PCIe x8 mode instead of x16, will lose a small amount of performance by being put in a PCIe 3.0 slot instead of a PCIe 4.0.

 

[geofelt]

You might want to be more specific as to the make/model of the gpu and motherboard involved.

Normally, though pcie versions are forward and backward compatible.
tests have shown minimal loss in performance between 3 and 4. Think 3% and mostly on the very highest performing class of cards.

I would not worry.

 

[GoldGlitch]

PCIE is backwards compatible. There are a handful of cases where there are issues, but it's hard to say. It would be better to actually tell us what GPU you're thinking of rather than phrase it as a theoretical. Bandwidth itself won't matter; you basically only lose a couple frames on the most high-end GPUs.

i5 4690k 4.4 (gtx 1050ti ) upgrade to rx 5700 (xt)

 

[GoldGlitch]

If the card has 16pcie lanes, no difference. AMD 6600xt only has 8 lanes and there was concern it would limit performance if used on Pcie 3.0. benchmarks didn't really show much of a difference.

I'm using a 6900xt on a first gen B350 board with Pcie 3.0, I'm sure I'm losing a few fps but it's really negligeable as it performs just fine.

You can do a Google search if you really want to see proof but it's a non issue.

rx 5700 xt
mbo : asrock z97m anniversary
cpu i5 4690k 4.4
gpu (gtx 1050ti) upgrade to 5700 xt

 

[alceryes]

I'm using a 6900xt on a first gen B350 board with Pcie 3.0, I'm sure I'm losing a few fps but it's really negligeable as it performs just fine.

I went from a PCIe 3.0 board to a PCIe 5.0 board.
Even though my 6900XT can now run at it's full PCIe 4.0 potential, there is no difference in performance over my old 3.0 board. The x16 lanes gave enough bandwidth.

 

[GoldGlitch]

I went from a PCIe 3.0 board to a PCIe 5.0 board.
Even though my 6900XT can now run at it's full PCIe 4.0 potential, there is no difference in performance over my old 3.0 board. The x16 lanes gave enough bandwidth.

5700xt its say its 4,0 x16 so its will ok to put in 3,0?

 

[alceryes]

tests have shown minimal loss in performance between 3 and 4. Think 3% and mostly on the very highest performing class of cards.

In edge cases, where you have a GPU that maxes out at x8 lanes, there is a more pronounced difference between PCIe 3.0 and 4.0+.

 

[geofelt]

Do a simple check to see if your cpu is up to a graphics card upgrade.
Run YOUR games, but lower your resolution and eye candy.
This makes the graphics card loaf a bit.
If your FPS increases, it indicates that your cpu is strong enough to drive a better graphics configuration.
If your FPS stays the same, you are likely more cpu limited.

 

[GoldGlitch]

Do a simple check to see if your cpu is up to a graphics card upgrade.
Run YOUR games, but lower your resolution and eye candy.
This makes the graphics card loaf a bit.
If your FPS increases, it indicates that your cpu is strong enough to drive a better graphics configuration.
If your FPS stays the same, you are likely more cpu limited.

my cpu is on 85%90%
gpu 99% all time

 

[geofelt]

my cpu is on 85%90%
gpu 99% all time

That is strange.
If the measurements are accurate, you have the most perfectly balanced system ever seen.
And, with both a cpu and gpu limiting your performance.

You may need to plan on both a cpu and a gpu upgrade.
What kinds of games do you play?
Fast action games will be graphics limited.
Cpu centric games like sims, mmo and strategy games wiill usually be limited by the single master thread.
Multiplayer with many participants may be limited by the numper of processing threads.

I might add that when changing, consider staying within the same vendor infrastructure. There is a learning curve. Consider the nvidia RTX3060 alternative.
Ditto on intel vs amd when changing processors.

 

[GoldGlitch]

That is strange.
If the measurements are accurate, you have the most perfectly balanced system ever seen.
And, with both a cpu and gpu limiting your performance.

You may need to plan on both a cpu and a gpu upgrade.
What kinds of games do you play?
Fast action games will be graphics limited.
Cpu centric games like sims, mmo and strategy games wiill usually be limited by the single master thread.
Multiplayer with many participants may be limited by the numper of processing threads.

I might add that when changing, consider staying within the same vendor infrastructure. There is a learning curve. Consider the nvidia RTX3060 alternative.
Ditto on intel vs amd when changing processors.

im play warzone 2 (low 55 60 fps)- ark (low 45 50fps) - pubg (low 60 65fps)
which gpu should I get then and if it is stronger than the 1050 ti