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AMD Instinct MI350X OAM vs AMD Instinct MI355X OAM

The Instinct MI355X delivers 9% more FP8 throughput than the Instinct MI350X (5,033 vs 4,614 TFLOPS dense).

Instinct MI350X: CDNA 4, 2025 Instinct MI355X: CDNA 4, 2025
FP8 dense lead
+9%
Instinct MI355X: 5,033 vs 4,614 TFLOPS
Memory
288 vs 288 GB
Same capacity
Bandwidth
8.0 TB/s vs 8.0 TB/s
Even
TDP
1.0 kW vs 1.4 kW
Instinct MI350X draws 400 W less
See rental pricing from $3.44/hr Download comparison sheet

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AMD Instinct MI350X OAM vs AMD Instinct MI355X OAM

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AMD Instinct MI350X OAM

Full specs →

What is the AMD Instinct MI350X?

The Instinct MI350X is a GPU from AMD on the CDNA 4 architecture, an accelerator for AI training, inference and high-performance computing. It is an OAM module, the open accelerator format used in multi-GPU servers. Instinct MI350X full specifications →

Can I rent the Instinct MI350X in the cloud?

Yes. Cloud providers tracked by Flopper rent the Instinct MI350X by the hour, and the pricing page compares their current rates and the price history side by side. Instinct MI350X rental prices →

How does the Instinct MI350X compare with other accelerators?

This page sets the Instinct MI350X against the Instinct MI355X. Both parts launched in the same year. Both are AMD parts, and both ship as an OAM module, so they fit the same class of system. The compare tool builds the same comparison for any two parts in the catalogue. All GPU comparisons →

Where do the Instinct MI350X figures come from?

Every Instinct MI350X figure on this page traces to AMD's own datasheet or specification table. How Flopper verifies specifications →

AMD Instinct MI355X OAM

Leads on FP8 Full specs →

What is the AMD Instinct MI355X?

The Instinct MI355X is a GPU from AMD on the CDNA 4 architecture, an accelerator for AI training, inference and high-performance computing. It is an OAM module, the open accelerator format used in multi-GPU servers. Instinct MI355X full specifications →

Can I rent the Instinct MI355X in the cloud?

Yes. Cloud providers tracked by Flopper rent the Instinct MI355X by the hour, and the pricing page compares their current rates and the price history side by side. Instinct MI355X rental prices →

How does the Instinct MI355X compare with other accelerators?

This page sets the Instinct MI355X against the Instinct MI350X. Both parts launched in the same year. Both are AMD parts, and both ship as an OAM module, so they fit the same class of system. The compare tool builds the same comparison for any two parts in the catalogue. All GPU comparisons →

Where do the Instinct MI355X figures come from?

Every Instinct MI355X figure on this page traces to AMD's own datasheet or specification table. How Flopper verifies specifications →

Specifications

Instinct MI350X
Instinct MI355X
Architecture
CDNA 4CDNA 4
Launch Year
20252025
Form Factor
OAMOAM
Memory
288 GB288 GB
Memory Bandwidth
8.0 TB/s8.0 TB/s
TDP
1.0 kW1.4 kW
Process Node
3nm/6nm3nm/6nm

Performance (TFLOPS)

Instinct MI350X
Instinct MI355X
72 TFLOPS 79 TFLOPS
144 TFLOPS 157 TFLOPS
No verified data available No verified data available
2,310 TFLOPS
4,619 TFLOPS sparse
2,517 TFLOPS
5,033 TFLOPS sparse
2,310 TFLOPS
4,619 TFLOPS sparse
2,517 TFLOPS
5,033 TFLOPS sparse
4,614 TFLOPS
9,227 TFLOPS sparse
5,033 TFLOPS
10,066 TFLOPS sparse
FP6
9,228 TFLOPS
sparse not published
10,066 TFLOPS
sparse not published
9,228 TFLOPS
sparse not published
10,066 TFLOPS
sparse not published
4,614 TOPS
9,227 TOPS sparse
5,033 TOPS
10,066 TOPS sparse

Figures are dense. Where a vendor publishes a figure it sits under the dense one and never decides a winner. Hover any precision for its definition, or read the GPU glossary.

FLOPS by Precision

What actually differs

Both launched in 2025, the Instinct MI350X on CDNA 4 and the Instinct MI355X on CDNA 4.

Both carry 288 GB of memory. Bandwidth is 8.0 TB/s against 8.0 TB/s, which sets the ceiling on decode speed.

Power is 1.0 kW against 1.4 kW, and at FP32 the Instinct MI350X does more work per watt. Weight the FP8 and FP16 rows for LLM work and the FP64 row for HPC.

New to the terms? The glossary explains FP64, FP32, BF16, FP16, FP8, FP4, INT8, Sparsity and TFLOPS.

Frequently asked questions

Is the Instinct MI350X faster than the Instinct MI355X?

At FP8 precision the Instinct MI355X reaches 5,033 TFLOPS dense against 4,614 TFLOPS for the Instinct MI350X. The performance table on this page lists every published precision for both GPUs.

Which should you choose, the Instinct MI350X or the Instinct MI355X?

Choose the Instinct MI355X for training and high-throughput inference: it has 9% more FP8 throughput than the Instinct MI350X. The Instinct MI355X draws 400 W more power, so budget for cooling and power delivery before you commit.

Which has more memory, the Instinct MI350X or the Instinct MI355X?

Both GPUs carry 288 GB of memory. Memory bandwidth is 8.0 TB/s for the Instinct MI350X and 8.0 TB/s for the Instinct MI355X.

How much power do the Instinct MI350X and the Instinct MI355X draw?

The Instinct MI350X is rated at 1.0 kW TDP and the Instinct MI355X at 1.4 kW. On FP32 throughput per watt, the Instinct MI350X is the more efficient part.

How much do the Instinct MI350X and the Instinct MI355X cost to rent?

Live cloud listings tracked by Flopper price the Instinct MI350X from $6.16 per GPU-hour across 1 provider, and the Instinct MI355X from $3.44 per GPU-hour across 1 provider. The rental section on this page links to every provider, rate and the price history for each GPU.

Where to Rent

AMD Instinct MI350X OAM

Rent from

$6.16 / GPU-hr

Lowest of 2 live listings across 1 provider

See all Instinct MI350X rental prices →

Price history and every provider on the pricing page. Some links are affiliate links.

AMD Instinct MI355X OAM

Rent from

$3.44 / GPU-hr

Lowest of 2 live listings across 1 provider

See all Instinct MI355X rental prices →

Price history and every provider on the pricing page. Some links are affiliate links.

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