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

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

Rig A

NVIDIA · workstation

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Rig B

AMD · accelerator

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Spec	NVIDIA DGX H200	AMD Instinct MI355X
Bf16 Matrix Pflops Dense	—	2.5
Bf16 Matrix Pflops Sparse	—	5
Compute Units	—	256
Cooling	—	direct liquid cooling (air-cooled option available)
CPU	2x Intel Xeon Platinum 8480C	—
CPU Cores Total	112	—
Form factor	—	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
FP8 Petaflops	32	—
GPU Count	8	—
GPU Model	H200 SXM	—
HBM (GB)	—	288
HBM Type	—	HBM3E
Helios Gpus PER Rack	—	72
Internal Storage	8x 3.84TB NVMe U.2	—
MAX Power KW	10.2	—
Memory bandwidth (TB/s)	—	8
Mxfp4 Matrix Pflops	—	10.1
Mxfp6 Matrix Pflops	—	10.1
Network MAX Gbps PER Port	400	—
Network Peak TB S	1	—
Network Ports	8x ConnectX-7 single-port (4x OSFP)	—
Nvlink PER GPU Bandwidth GB S	900	—
Nvswitch Bandwidth TB S	7.2	—
Nvswitch Count	4	—
OS Storage	2x 1.92TB NVMe M.2	—
Pcie GEN	—	5
Process Node NM	—	3
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
System Memory TB	2	—
TBP Watts	—	1,400
Total GPU Memory GB	1,128	—