AMD Radeon RX 7900 XTX vs AMD Radeon Instinct MI455X
GPU · Specs Compare
Graphics Card
Release Date
Nov 2022
Jul 2026
Generation
Navi III
Radeon Instinct
Type
Desktop
Desktop
Bus Interface
PCIe 4.0 x16
PCIe 6.0 x16
Clock Speeds
Base Clock
1929 MHz
1000 MHz
Boost Clock
2498 MHz
2400 MHz
Memory Clock
2500 MHz
1900 MHz
Memory
Memory Size
24GB
432GB
Memory Type
GDDR6
HBM4
Memory Bus
384bit
24576bit
Bandwidth
960.0GB/s
23.3TB/s
Render Config
Compute Units
96
256
Shading Units
6144
32768
TMUs
384
1024
ROPs
192
0
RT Cores
96
—
L1 Cache
256 KB per Array
32 KB (per CU)
L2 Cache
6 MB
192 MB
L3 Cache
96 MB
—
Theoretical Performance
Pixel Rate
479.6 GPixel/s
0 MPixel/s
Texture Rate
959.2 GTexel/s
2457.6 GTexel/s
FP16 (half)
122.8 TFLOPS
157.3 TFLOPS
FP32 (float)
61.39 TFLOPS
157.3 TFLOPS
FP64 (double)
1.918 TFLOPS
2.458 TFLOPS
Graphics Processor
GPU Name
Navi 31
MI450 256CU
GPU Variant
Navi 31 XTX(215-145000146)
—
Architecture
RDNA 3.0
CDNA 5.0
Foundry
TSMC
TSMC
Process Size
5 nm
2 nm
Transistors
57.7 billion
320 billion
Die Size
529 mm²
Unknown
Board Design
TDP
355W
2300W
Suggested PSU
750 W
2700 W
Outputs
1x HDMI 2.1a2x DisplayPort 2.11x USB Type-C
No outputs
Power Connectors
2x 8-pin
None
Graphics Features
DirectX
12 Ultimate (12_2)
N/A
OpenGL
4.6
N/A
OpenCL
2.2
3.0
Vulkan
1.4
N/A
Shader Model
6.8
N/A
Benchmark
3DMark Time Spy
30,512
—
3DMark Time Spy Extreme
15,278
—
3DMark Speed Way
6,363
—
Shadow of the Tomb Raider 2160p
127
—
Cyberpunk 2077 2160p
60
—
Shadow of the Tomb Raider 1440p
228
—
Cyberpunk 2077 1440p
108
—
Shadow of the Tomb Raider 1080p
310
—
Blender
4,680
—
Cyberpunk 2077 1080p
176
—
GTA 5 2160p
175
—
GTA 5 1440p
175
—
GTA 5 1080p
190
—
Horizon Forbidden West 1080p
144
—
Horizon Forbidden West 1440p
121
—
Horizon Forbidden West 2160p
80
—
▲ Specs Compare
Data sourced from official specifications and benchmark tests.