Side-by-side, with the numbers that matter.

Two rigs, one table. Higher numbers win in cobalt; TDP and price flip.

Rig A

Apple · mac

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Rig B

AMD · accelerator

Change

0 of 39 fields comparable

Spec	Apple Mac Pro (M2 Ultra, 2023)	AMD Instinct MI355X
Bf16 Matrix Pflops Dense	—	2.5
Bf16 Matrix Pflops Sparse	—	5
Chip	Apple M2 Ultra	—
Compute Units	—	256
Cooling	—	direct liquid cooling (air-cooled option available)
CPU Cores	24	—
CPU Efficiency Cores	8	—
CPU Performance Cores	16	—
Discontinued ON	2026-03-26	—
Form factor	tower / rack	OAM
Fp16 Matrix Pflops Dense	—	2.5
Fp16 Matrix Pflops Sparse	—	5
Fp32 Vector Tflops	—	157.3
Fp64 Matrix Tflops	—	78.6
FP8 Matrix Pflops Dense	—	5
FP8 Matrix Pflops Sparse	—	10.1
GPU Cores MAX	76	—
GPU Cores MIN	60	—
HBM (GB)	—	288
HBM Type	—	HBM3E
Helios Gpus PER Rack	—	72
Memory bandwidth (GB/s)	800	—
Memory bandwidth (TB/s)	—	8
MSRP (USD)↓ better	6,999	—
Mxfp4 Matrix Pflops	—	10.1
Mxfp6 Matrix Pflops	—	10.1
Neural Engine Cores	32	—
Pcie Expansion	true	—
Pcie GEN	—	5
Process Node NM	—	3
SSD TB Options	1, 2, 4, 8	—
Status	discontinued	—
Successor Cdna Version	—	5
Successor Family	—	AMD Instinct MI400 Series (MI455X)
Successor Launch	—	2026-07-23
Successor Mi455x Bandwidth TB S	—	23.3
Successor Mi455x Hbm4 GB	—	432
TBP Watts	—	1,400
Unified Memory GB Options	64, 128, 192	—