Poor 5090 performance over 4090

I just got a 5090 and ran a couple of tests when I had my 4090 in the machine still.
When I ran the exact same tests with the 5090, its rendered slower on both tests?

RHEA x2 upscale was 24.3 fps and on the 4090, it used 100% GPU.
On the 5090, I got only 22 fps and it used just 50% of the GPU.

On Proteus, the 4090 rendered at 16.2 fps and fluctuated between 30%-99% GPU.
On 5090, I only got 15 fps and only used 35% GPU.

I know it early days for the 5090 and they are still hard to get hold of but I’m hoping they be some improvements soon.
I used the latest Topaz Video AI version of 6.1.3 btw.

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I think the 50 series improvements are still only in alpha.

Topaz Video AI Alpha 6.1.1.1.a.trt (RTX 5000 Optimization).

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Thank you! Didn’t know about this so will try it out.