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Chip comparison

AMD Instinct MI325X vs NVIDIA L40S

Side-by-side specs

Straight from each vendor's datasheet. Winner in bold: higher throughput, memory, or transistor count; lower power draw or price. Sparse (2:4) throughput roughly doubles the FP8/INT8 numbers shown.

FieldAMD Instinct MI325XNVIDIA L40S
Process nodeTSMC N5 + N6 (chiplet)TSMC 4N
Transistors (B)—76.3
TDP1000 W350 W
Memory256 GB HBM3e48 GB GDDR6
Memory bandwidth6,000 GB/s864 GB/s
FP16 (dense)1,307 TFLOPS362 TFLOPS
BF16 (dense)1,307 TFLOPS362 TFLOPS
FP8 (dense)2,614 TFLOPS733 TFLOPS
INT8 (dense)2,614 TOPS733 TOPS
Form factorOAMPCIe
Announced2024-10-102023-08-08
Released2025-01-01—

Robots running AMD Instinct MI325X

No robots publicly running it yet.

Robots running NVIDIA L40S

No robots publicly running it yet.

Data centers with AMD Instinct MI325X

No data centers publicly running it yet.

Data centers with NVIDIA L40S

No data centers publicly running it yet.

Common questions

AMD Instinct MI325X vs NVIDIA L40S: which is faster for training?

AMD Instinct MI325X has 3.57x the dense FP8 throughput of the other (AMD Instinct MI325X: 2,614 TFLOPS; NVIDIA L40S: 733 TFLOPS). Real-world training speed also depends on memory bandwidth, interconnect, and software stack: see the spec diff for those inputs.

AMD Instinct MI325X vs NVIDIA L40S: which has more memory?

AMD Instinct MI325X carries more HBM (AMD Instinct MI325X: 256 GB HBM3e; NVIDIA L40S: 48 GB GDDR6). Memory capacity sets the largest model that fits on one chip without partitioning; memory bandwidth sets inference throughput.

AMD Instinct MI325X vs NVIDIA L40S: which is more power-efficient?

Dense FP8 TFLOPS per watt: AMD Instinct MI325X 2.61 (2,614 ÷ 1000 W); NVIDIA L40S 2.09 (733 ÷ 350 W). AMD Instinct MI325X wins at the die level; system-level efficiency also depends on cooling and interconnect.

See also: every chip comparison · AMD Instinct MI325X full page · NVIDIA L40S full page.