Can high end GPU and low end CPU cause problems?

[wienerslinky]

Because i had a GTX 950 a while back and it was working normally. 1080p low/ medium settings most games 60fps. now i have a Radeon R9 380 and performance seems to have gone down in all my games (gta 5, dying light, far cry 4) and yes, i did install and delete drivers correctly. my CPU is an AMD a10-7700k black edition. so can my low and cpu actually make performance worse if you have a high end card instead of a low end card/ because in unigine heaven benchmark i got perfect results for my GPU so my gpu isnt the problem....

 

[AGiLE KiTTY]

Can high end GPU and low end CPU cause problems? Yes, To be specific it's called a Bottleneck. It doesn't make performance "Worse" but It would limit performance.

And A10-7700K would hold back the R9 380 by a significant amount.

 

[wienerslinky]

Can high end GPU and low end CPU cause problems? Yes, To be specific it's called a Bottleneck. It doesn't make performance "Worse" but It would limit performance.

And A10-7700K would hold back the R9 380 by a significant amount.

Yes, i know it would bottleneck. But now my performance has decreased because i have a higher performance gpu in my system.

 

[AGiLE KiTTY]

How about the temperature levels?

 

[synphul]

It could be a matter of drivers. Not having improper or old drivers but amd vs nvidia. In several cases the nvidia drivers have had a history of being more efficient than amd's gpu drivers placing less of a workload on the cpu. You switched from one gpu to another and moved from nvidia's drivers to amd's. If the cpu/apu were the limiting piece of hardware then performance shouldn't have changed.

It's not as apparent on intel cpu's but on amd's cpu/apu with lower performing cores there were several times in the past where they paired better with nvidia graphics cards for that very reason, less driver overhead. This may not be the problem entirely but could be part of the performance drop.

 

[Stysner]

There's no real reason why framerates would go DOWN. Because the GPU has to wait for the CPU to send it instructions, so the only thing that could happen (bottleneck) would be that the framerates go up, stay the same, but in any case don't reach the potential of the GPU. But the frames going down is really weird if the card is better than the previous one.

How much did they go down?

 

[wienerslinky]

There's no real reason why framerates would go DOWN. Because the GPU has to wait for the CPU to send it instructions, so the only thing that could happen (bottleneck) would be that the framerates go up, stay the same, but in any case don't reach the potential of the GPU. But the frames going down is really weird if the card is better than the previous one.

How much did they go down?

in CPU intensive games about 10~15 (sometimes even 20) frames. especially GTA 5 and Far cry 4 and fallout 4

 

[Stysner]

in CPU intensive games about 10~15 (sometimes even 20) frames. especially GTA 5 and Far cry 4 and fallout 4

Did you change the settings for those games? There are NVidia graphics options that will destroy performance on an AMD card. Things like PhysX, (forgot the name😉 NVidia (percentage?) soft shadows, the hair effects in the Witcher 3, and so on. They're collectively called NVidia GameWorks, and are coded by NVidia to run well on their cards and badly on AMD cards.

Other than that I can't really think of a reason why frames would drop that much. Maybe try FXAA instead of MSAA or TXAA.