GPU Comparison

A

AMD

RADEON

AMD Instinct MI455X

CORE STATE MI450 256CU

VRAM 432 GB

CLOCK SPEED 2400 MHz

TDP 2300 W

BUS WIDTH 24576 bit

ARCHITECTURE CDNA 5.0

nm

PROCESS 2 nm

LAUNCH DATE 2026

VS

NVIDIA

GEFORCE

GeForce RTX 5080

CORE STATE GB203

VRAM 16 GB

CLOCK SPEED 2617 MHz

TDP 360 W

BUS WIDTH 256 bit

ARCHITECTURE Blackwell 2.0

nm

PROCESS 5 nm

LAUNCH DATE 2025

PERFORMANCE BENCHMARKS

3dmark_3dmark_steel_nomad_dx12

N/A

8,637

geekbench_opencl

N/A

235,901

geekbench_vulkan

N/A

255,450

passmark_directx_10

N/A

208

passmark_directx_11

N/A

324

passmark_directx_12

N/A

151

passmark_directx_9

N/A

389

passmark_g2d

N/A

1,415

passmark_g3d

N/A

36,565

passmark_gpu_compute

N/A

21,789

DETAILED SPECIFICATIONS

SPECIFICATION

Instinct MI455X

RTX 5080

Core Specs

Shading Units

32,768

10,752 -67.2%

Shaders

32,768

10,752 -67.2%

TMUs

1,024

336 -67.2%

ROPs

0

112 +∞%

Compute Units

256

—

SM Count

—

84

Clocks

Base Clock

1000 MHz

2295 MHz

Boost Clock

2400 MHz

2617 MHz

Memory Clock

1900 MHz 7.6 Gbps effective

1875 MHz 30 Gbps effective

Memory

Memory Size

432 GB

16 GB

VRAM (MB)

442,368

16,384 -96.3%

Memory Type

HBM4

GDDR7

Memory Bus

24576 bit

256 bit

Bandwidth

23.3 TB/s

960.0 GB/s

Cache

L1 Cache

32 KB (per CU)

128 KB (per SM)

L2 Cache

192 MB

64 MB

Performance

Pixel Rate

0 MPixel/s

293.1 GPixel/s

Texture Rate

2,457.6 GTexel/s

879.3 GTexel/s

FP32 (TFLOPS)

157.3 TFLOPS

56.28 TFLOPS

FP64 (TFLOPS)

2.458 TFLOPS (1:64)

879.3 GFLOPS (1:64)

FP16 (TFLOPS)

157.3 TFLOPS (1:1)

56.28 TFLOPS (1:1)

AI/RT

RT Cores

—

84

Tensor Cores

—

336

Matrix Cores

1,024

—

Power

TDP

2300 W

360 W

TDP (W)

2,300

360 -84.3%

Suggested PSU

2700 W

750 W

Power Connectors

None

1x 16-pin

Architecture

Architecture

CDNA 5.0

Blackwell 2.0

GPU Name

MI450 256CU

GB203

Generation

Instinct (MIx)

GeForce 50

Process Size

2 nm

5 nm

Transistors

320,000 million

45,600 million

Die Size

2990 mm²

378 mm²

Foundry

TSMC

TSMC

Density

107.0M / mm²

120.6M / mm²

API Support

DirectX

—

12 Ultimate (12_2)

OpenGL

—

4.6

Vulkan

—

1.4

OpenCL

3.0

3.0

CUDA

—

12.0

Shader Model

—

6.9

Physical

Slot Width

EAM Module

Dual-slot

Length

—

304 mm 12 inches

Height

—

137 mm 5.4 inches

Outputs

No outputs

1x HDMI 2.1b3x DisplayPort 2.1b

Bus Interface

PCIe 6.0 x16

PCIe 5.0 x16

Other

Launch Price

—

999 USD

Production

—

Active

Predecessor

Radeon Instinct

GeForce 40

Successor

—

GeForce 60

View Instinct MI455X Details View GeForce RTX 5080 Details