That 4 MB of graphics memory is interesting. I believe it is 4 MB of GEMM, not 4 MB of L2.
Chips&Cheese found that the Snapdragon 8+ Gen 1's iGPU has 2 MB of GEMM and 256 KB of L2.
Mobile SoCs have come a long way over the past eight years. I previously covered the Adreno 530 in Qualcomm’s Snapdragon 821, which had to do its best within a tiny power and thermal envelope…
chipsandcheese.com
1024 ALUs corresponds to 2 MB of GEMM.
Considering that X Elite is using the same Adreno 7xx architecture as 8 Gen 1, we can estimate that it has 2048 ALUs, corresponding to 4 MB of GEMM.
8 Gen 1: Adreno 730 : 1024 ALUs : 2 MB GEMM
8 Gen 2 : Adreno 740 : 1536 ALUs : 3 MB GEMM (?)
8 Gen 3 : Adreno 750 : 1792 ALUs : 3.5 MB GEMM (?)
X Elite : Adreno 7xx : 2048 ALUs (?) : 4 MB GEMM (?)
Of course this estimate could be entirely incorrect, because the 4 MB figure comes from the above mentioned leaker, and I assumed it was for solely the GEMM. (Perhaps it could be the sum of GEMM + L2).