# Instinct MI455X

> AMD · CDNA 5

Canonical: https://gpuninja.com/chips/instinct-mi455x
Data as of: 2026-10-11T17:07:01Z
Path: Home › GPU chips
- Specs verified: 11 Oct 2026, 17:07 UTC

## Specifications

- Vendor: AMD (Verified · source amd.com · retrieved 11 Oct 2026, 16:17 UTC · checked 11 Oct 2026, 17:07 UTC)
- Architecture: CDNA 5 (Verified · source amd.com · retrieved 11 Oct 2026, 16:17 UTC · checked 11 Oct 2026, 17:07 UTC)
- Die: Unknown
- Process: TSMC N2 (Verified · source amd.com · retrieved 11 Oct 2026, 17:04 UTC · checked 11 Oct 2026, 17:07 UTC)
- Shader cores: 32,768 (Unverified · source amd.com · retrieved 11 Oct 2026, 17:04 UTC · checked 11 Oct 2026, 17:07 UTC)
- Tensor cores: 1,024 (Unverified · source servethehome.com · retrieved 11 Oct 2026, 16:18 UTC · checked 11 Oct 2026, 17:07 UTC)
- RT cores: None
- Memory bus: 24,576-bit (Verified · source amd.com · retrieved 11 Oct 2026, 17:04 UTC · checked 11 Oct 2026, 17:07 UTC)
- Max VRAM: 432 GB (Verified · source amd.com · retrieved 11 Oct 2026, 16:17 UTC · checked 11 Oct 2026, 17:07 UTC)
- Reference boost clock: 2,400 MHz (Verified · source amd.com · retrieved 11 Oct 2026, 16:17 UTC · checked 11 Oct 2026, 17:07 UTC)
- Reference TDP: Unknown
- Host interface: Not recorded
- Launch MSRP: No public MSRP
- Launch date: 23 Jul 2026 (Verified · source amd.com · retrieved 11 Oct 2026, 16:17 UTC · checked 11 Oct 2026, 17:07 UTC)
- Segment: Data center (Verified · source amd.com · retrieved 11 Oct 2026, 16:17 UTC · checked 11 Oct 2026, 17:07 UTC)
- PCI IDs: Unknown
- Status: Active (Verified · source amd.com · retrieved 11 Oct 2026, 16:17 UTC · checked 11 Oct 2026, 17:07 UTC)

## Performance

- Memory bandwidth: 23,300 GB/s (Verified · source amd.com · retrieved 11 Oct 2026, 16:17 UTC · checked 11 Oct 2026, 17:07 UTC)
- FP32 compute: 315 TFLOPS (Verified · source amd.com · retrieved 11 Oct 2026, 16:17 UTC · checked 11 Oct 2026, 17:07 UTC)
- FP16 compute: 5,030 TFLOPS (Verified · source amd.com · retrieved 11 Oct 2026, 17:04 UTC · checked 11 Oct 2026, 17:07 UTC)
- BF16 compute: 5,030 TFLOPS (Verified · source amd.com · retrieved 11 Oct 2026, 17:04 UTC · checked 11 Oct 2026, 17:07 UTC)
- FP8 compute: 20,130 TFLOPS (Verified · source amd.com · retrieved 11 Oct 2026, 17:04 UTC · checked 11 Oct 2026, 17:07 UTC)
- FP4 compute: 40,260 TFLOPS (Verified · source amd.com · retrieved 11 Oct 2026, 17:04 UTC · checked 11 Oct 2026, 17:07 UTC)
- INT8 compute: 5,000 TOPS (Verified · source amd.com · retrieved 11 Oct 2026, 16:17 UTC · checked 11 Oct 2026, 17:07 UTC)

## Boards built on this chip

Board, Chip, VRAM, TDP, Length, Slots, Price, Stock

No boards recorded for this chip.

## Benchmarks

No benchmark results recorded.

## Sources

- https://www.amd.com/en/products/accelerators/instinct/mi400/mi455x.html — Vendor, Architecture, Max VRAM, Reference boost clock, Launch date, Segment, Status, Memory bandwidth, FP32 compute, INT8 compute; last verified 11 Oct 2026, 17:07 UTC
- https://www.amd.com/content/dam/amd/en/documents/products/technologies/cdna/amd-cdna5-whitepaper.pdf — Process, Shader cores, Memory bus, FP16 compute, BF16 compute, FP8 compute, FP4 compute; last verified 11 Oct 2026, 17:07 UTC
- https://www.servethehome.com/amd-instinct-mi455x-deep-dive-cdna-5-marks-the-next-era-of-instinct/3/ — Tensor cores; last verified 11 Oct 2026, 17:07 UTC