AMD Phoenix APU to pack an RDNA 3 GPU for performance that allegedly rivals desktop GPUs

[Redaktion]

Rumors have it that AMD is preparing a Zen 4-based "Phoenix" APU with an integrated GPU powered by the upcoming RDNA 3 architecture. Leaks suggest that the Phoenix APU can pack as many as 16 RDNA 3 CUs, resulting in a massive performance increase compared to the current generation AMD APUs.

https://www.notebookcheck.net/AMD-Phoenix-APU-to-pack-an-RDNA-3-GPU-for-performance-that-allegedly-rivals-desktop-GPUs.616560.0.html

[Anonymousgg]

16 CUs seems like the obvious number, any more than that would be gravy on top. Also nice to get confirmation that it's RDNA3 and not RDNA2.

Strix Point will be a beast even if it's just +25-40% faster.

[8&8]

Ehhhh, finally!!!
A modern APU with the GTX980 level performance of 10 yers old!👨🏻‍🦳

In just 75W that can be overclocked up to 100W. 🍖
                                        🔥

[Mr. A]

Hope the price point dont hit the roof

[Aliyyyy]

Saying it is between 6600xt and 6500xt because of 1536 shader is dumb

Memory bandwidth is still less than half of 6600xt

[Megalomaniak]

Saying it is between 6600xt and 6500xt because of 1536 shader is dumb

Memory bandwidth is still less than half of 6600xt

memory bandwidth is still a relevant point of course, but do note that the article mentioned 6600 not the xt.

[Rob Stan]

16 CUs seems like the obvious number, any more than that would be gravy on top. Also nice to get confirmation that it's RDNA3 and not RDNA2.

Strix Point will be a beast even if it's just +25-40% faster.

Hmmm.

Do note that RDNA2 CU =/= RDNA3 CU
The components grouping and hardware scheduling is totally redesigned (some say a bigger redesign that GCN5 to RDNA1)

Some speculated that "Compute Units" will be gone as a unit of design/measure in RDNA3, but they still seem to be there.

Just that 1 RDNA3 CU = 128 stream processors, up from 64 in GCN/RDNA1/RDNA2

So looks like CU-wise, 12 might be the number for full spec Phoenix (= 1536 RDNA3 stream processors, 2x more than Rembrandt)

[Rob Stan]

Saying it is between 6600xt and 6500xt because of 1536 shader is dumb

Memory bandwidth is still less than half of 6600xt

Like someone else said, side-note: they mentioned RX 6600, not the XT SKU. And it's not as far-fetched as you'd think. RTX 3050-like performance isn't totally unrealistic.

Anyway, yes, raw compute specs are just half the picture and bandwidth matters a lot, but do note that:

1. Phoenix/RDNA3 will come with massively redesigned cache hierarchies (likely even bigger L2-per-stream processors than Rembrandt/RDNA2 over previous generations and more efficient hardware scheduling and loading of stream processors)
2. It looks like RDNA3 will also feature massively redesigned DCC hardware (this helps with bandwidth usage efficiency), basically RDNA3 will do more with (for example) 100GB/s of bandwidth than RDNA2.
3. (for mobile and miniPC prebuilts and such) It's highly likely Phoenix will have support for LPDDR5X, which can operate from 7500 to 8533Mbps (up to 33% higher than the LPDDR5-6400 Rembrandt supports)

So even without dedicated middle-man memory like Infinity Cache on dGPU RDNA2/3, I think they'll do a lot to properly address how these RDNA3 iGPUs will feed themselves with information.

Either way, it looks very likely that nVidia's "MX600" dGPUs will not be a thing next generation. Both Intel and especially AMD are upping the iGPU game a lot.