AMD will need a higher ROPS count for Navi 2X GPUs, for 4K gaming

[g67575]

ROPs (Render Output Unit) are very important for rendering more pixels, for higher resolutions.

To my knowledge, there are only 2 consumer graphics cards with more than 64 ROPs, the GTX 1080 TI and the RTX 2080 TI.

To double the pixel rate (GPU clock x ROP count) of my current Graphics card (R9 390), I'd need to buy either a super overclocked Navi RX 5700 XT, or (expensive) Nvidia cards such as the GTX 1080 TI, or RTX 2080 TI.

My old R9 390 has the same number of ROPs (64) as most modern GPUs.

Alternatively, AMD could just use much higher GPU core clocks, which in my view, would be a worse option.

EDIT - just noticed that the Xbox X series GPU will have 80 ROPs, with a slightly lower clock than the Navi RX 5700 XT, so pixel rates of ~152,400‬ (1905 MHz x 80 ROPs) should be achievable for Navi 2X GPUs.

 

[g67575]

Nope, but lower pixel rate is a big disadvantage, and games will focus more and more on higher resolutions with the new console releases this year.

Also, the 980Ti has a fairly low GPU clock of 1000, which reduces the pixel rate quite a bit.

 

[g67575]

I suppose I'm not surprised, 8K resolution is 33.177‬ million pixels, 4K resolution is 8.294 million pixels. Rendering 4x the number of pixels should logically need a GPU with about 4x the pixel rate.

That's a lot of ROPs...

I think that's why AMD has mentioned aiming for 4K in games, not 8K.

 

[g67575]

Nah, unfortunately Sony / AMD have (reportedly) agreed on the 'standard' 64 ROPs for the PS5 GPU:

Specs here:
https://www.techpowerup.com/gpu-specs/playstation-5-gpu.c3480

However, the important thing is that the overall pixel rate is very similar to the Xbox Series X GPU (both over 140GPixel/s), due to the much higher GPU clock rate of 2233 MHz.

If you combine the above clock rate with 80 ROPs, an impressive pixel rate of 178,640‬ is possible (maybe for higher end Navi 2x GPUs).

 

[g67575]

I'm on a 28" 4K monitor and was wondering, how does VSR / DSR on a 1080p monitor, rendering at 4K resolution, compare to native 4k resolution?

Has anyone compared it? Does VSR / DSR @ 4K on a small 1080p monitor get rid of the aliasing / jagged edges in games?

 

[g67575]

I tried 8K on my 4K monitor on GTA V (frame scaling enabled) and it looked even better than MSAA 8x antialiasing, surprisingly I could get around 20 FPS even on an old GPU.

Should be possible to run some games at 8K with next gen cards I think, if not running all settings at max.