Possible RDNA 2 Navi 21 benchmark

g67575 · 13 Sep 2020 at 17:58

A benchmark on notebookcheck.net is showing an AMD GPU that scores at about the same level as a RTX 2080 TI at stock frequencies.

Link here:
https://www.notebookcheck.net/Alleg...tock-Nvidia-GeForce-RTX-2080-Ti.493429.0.html

My initial impression is that it could be real, I'm doubtful RTX 3080 performance will be possible with RDNA 2 graphics cards (at least in 2020).

I'd be happy with RTX 2080 TI / RTX 3070 performance, especially if it's offered for less than the RTX 3070.

andy_mk3 · 13 Sep 2020 at 18:03

This came out yesterday. Likely to be Navi 23 or 22, not the top end Navi 21.

random_matt · 13 Sep 2020 at 18:19

3rd sentence full of confirmation bias.

g67575 · 13 Sep 2020 at 20:08

I can only go by what we know at the moment. We know Nvidia has doubled their shader unit count by increasing the instruction count per SM to 2.

Yesterday, I worked out that AMD would need a GPU with 108 CUs, clocked at 2233mhz to exceed the TFlop count of the RTX 3080. If AMD have somehow found another way to increase the Shading Unit count, then you can disregard the previous sentence.

I'd like the top RDNA 2 GPU to be as fast as the RTX 3080, but I see no evidence or information yet suggesting that it could be.

The problem with the Ashes of the Singularity benchmarks that appeared yesterday, is that they gave a misleading impression of the performance of the RTX 2080 TI, by including the scores of heavily overclocked versions. Although, they do also show the RTX 2080 TI at stock clocks too, which I consider to be a fairer comparison (the score was 6100 - 6200, about equal to the AMD GPU shown).

humbug · 13 Sep 2020 at 20:28

g67575 said:
A benchmark on notebookcheck.net is showing an AMD GPU that scores at about the same level as a RTX 2080 TI at stock frequencies.

Link here:
https://www.notebookcheck.net/Alleg...tock-Nvidia-GeForce-RTX-2080-Ti.493429.0.html

My initial impression is that it could be real, I'm doubtful RTX 3080 performance will be possible with RDNA 2 graphics cards (at least in 2020).
I'd be happy with RTX 2080 TI / RTX 3070 performance, especially if it's offered for less than the RTX 3070.

I think if that's the best AMD can do they should give it all up and stick to consoles because this is no better.

This is none sense.

humbug · 13 Sep 2020 at 20:31

g67575 said:
I can only go by what we know at the moment. We know Nvidia has doubled their shader unit count by increasing the instruction count per SM to 2.

Yesterday, I worked out that AMD would need a GPU with 108 CUs, clocked at 2233mhz to exceed the TFlop count of the RTX 3080. If AMD have somehow found another way to increase the Shading Unit count, then you can disregard the above sentence.

I'd like the top RDNA 2 GPU to be as fast as the RTX 3080, but I see no evidence or information yet suggesting that it could be.

The problem with the Ashes of the Singularity benchmarks that appeared yesterday, is that they gave a misleading impression of the performance of the RTX 2080 TI, by including the scores of heavily overclocked versions. Although, they do also show the RTX 2080 TI at stock clocks too, which I consider to be a fairer comparison (the score was 6100 - 6200, about equal to the AMD GPU shown).

By that measure, how about 160 CU's? Would that do it for you?

g67575 · 13 Sep 2020 at 20:31

You guys are only saying that because we know how fast the RTX 3000 series is. Compared to the RTX 2000 series, I think the RDNA 2 GPUs look like they will offer good value. Isn't that usually what AMD tries to do?

fs123 · 13 Sep 2020 at 20:43

g67575 said:
I can only go by what we know at the moment. We know Nvidia has doubled their shader unit count by increasing the instruction count per SM to 2.

Yesterday, I worked out that AMD would need a GPU with 108 CUs, clocked at 2233mhz to exceed the TFlop count of the RTX 3080.

I'd like it to be as fast as the RTX 3080, but I see no evidence or information yet suggesting that it could be.

Do you really think the TF performance reflects the reality of what we have seen? The TFlops of 3080 is 3x that of 2080Ti yet we know its probably only about 30-40% faster.

humbug · 13 Sep 2020 at 20:45

g67575 said:
You guys are only saying that because we know how fast the RTX 3000 series is. Compared to the RTX 2000 series, I think the RDNA 2 GPUs look like they will offer good value. Isn't that usually what AMD tries to do?

So you think AMD are just in it to give us cheap GPU's?

fs123 said:
Do you really think the TF performance reflects the reality of what we have seen? The TFlops of 3080 is twice that of 2080Ti yet we know its probably only about 30-40% faster.

Yup, and they did that by doubling the CUDA cores in the SM's, much like the XBox Series X has dual CU SM's.

g67575 · 13 Sep 2020 at 21:07

It doesn't look like AMD has the same / similar advantage as Nvidia, with effectively double the amount of shader units, per CU / SM.

EDIT - It looks like the figure of 3328 shading units for the Xbox series X on techpowerup is correct, the same number is confirmed in a Eurogamer article. Link here:
https://www.eurogamer.net/articles/digitalfoundry-2020-inside-xbox-series-x-full-specs

With Nvidia SM's, there are 128 shader units per SM (64 shaders multiplied by 2 instructions) for the RTX 3000 series. With AMD, its 64 shader units per CU.

Lokken86 · 13 Sep 2020 at 21:19

g67575 said:
It doesn't look like AMD has the same / similar advantage as Nvidia, with effectively double the amount of shader units, per CU / SM.

No but the clock speeds could be a lot higher then the equivalent cards by Nvidia. Worst case scenario they could be 1700mhz ish. Best case over 2300mhz. Will make a huge difference to the final performance.

g67575 · 13 Sep 2020 at 21:33

Yeah, that will certainly help. They will need a clock rate of around 2233mhz to compete with the RTX 3070's 20.3 TFlop count (assuming 72 or more CUs). I guess they could get a bit more performance with IPC improvements too.

humbug · 13 Sep 2020 at 22:01

g67575 said:
It doesn't look like AMD has the same / similar advantage as Nvidia, with effectively double the amount of shader units, per CU / SM.

EDIT - It looks like the figure of 3328 shading units for the Xbox series X on techpowerup is correct, the same number is confirmed in a Eurogamer article. Link here:
https://www.eurogamer.net/articles/digitalfoundry-2020-inside-xbox-series-x-full-specs

With Nvidia SM's, there are 128 shader units per SM (64 shaders multiplied by 2 instructions) for the RTX 3000 series. With AMD, its 64 shader units per CU.

The Tech Power Up link is pure speculation, what we do know is the XBox Series X operates 26 SM's with 52 CU's.

By comparison the 5700XT is 40 SM's with 40 CU's.

humbug · 13 Sep 2020 at 22:03

humbug said:
The Tech Power Up link is pure speculation, what we do know is the XBox Series X operates 26 SM's with 52 CU's.

By comparison the 5700XT is 40 SM's with 40 CU's.

I almost forgot, the Series X is 12.1 TF with 26 SM's, the 5700XT is 9.7 TF with 40 SM's.

EastCoastHandle · 13 Sep 2020 at 22:07

random_matt said:
3rd sentence full of confirmation bias.

Indeed, confirmed.
AMD has several skus they are going to release yet any leak info show average performance must be Big Navi :rolleyes:

At best this is just a RDNA 2 sku...Which one?? No one knows yet.

g67575 · 13 Sep 2020 at 22:22

Well, let me know if any other credible info becomes available.

And chill out, its not the end of the world if RDNA 2 ends up 'only' performing as well as an RTX 2080 TI.

Anyone who wants to check the results of the Ashes of the Singularity benchmark themselves can view them here:
https://www.ashesofthesingularity.com/benchmark#/?filters={"gpu":"","cpu":"","api":"","preset":"Crazy_4k","resolution":"","offset":0,"search":"AMD Radeon(TM) Graphics","personaId":null,"sort":"fps","direction":"desc","benchmarkVersionId":5491,"useVersionInequality":true}

The user who uploaded them is called "AMD_Orlando".

random_matt · 13 Sep 2020 at 23:04

Think most people would be even happy with something in-between 3070-3080 at £399-£499 or something like that.

humbug · 13 Sep 2020 at 23:22

Big Navi is called Sienna Cichlid

Howling · 13 Sep 2020 at 23:26

This has already been covered in depth and the general consensus seems to be it's an engineering sample of the 6700 which is supposedly meant to compete with the 3070. I've not seen anyone suggest this was navi 21 outside of the thread title - which ... I mean... there's some bias shown there I guess. But, we'll see eventually. All this belittling AMD and hyping AMD and belittling and hyping is getting hella old tbh.

humbug · 13 Sep 2020 at 23:30

Howling said:
This has already been covered in depth and the general consensus seems to be it's an engineering sample of the 6700 which is supposedly meant to compete with the 3070. I've not seen anyone suggest this was navi 21 outside of the thread title - which ... I mean... there's some bias shown there I guess. But, we'll see eventually. All this belittling AMD and hyping AMD and belittling and hyping is getting hella old tbh.

Not long now and all this will be over....