AMD Radeon Instinct MI355X vs AMD Radeon HD 6990M
GPU · Specs Compare
Graphics Card
Release Date
Jun 2025
Jul 2011
Generation
Radeon Instinct
Vancouver
Type
Professional
Mobile
Bus Interface
PCIe 5.0 x16
MXM-B (3.0)
Clock Speeds
Base Clock
1000 MHz
—
Boost Clock
2400 MHz
—
Memory Clock
2000 MHz
900 MHz
Memory
Memory Size
288GB
2GB
Memory Type
HBM3e
GDDR5
Memory Bus
8192bit
256bit
Bandwidth
8.19TB/s
115.2GB/s
Render Config
Compute Units
256
14
Shading Units
16384
1120
TMUs
1024
56
ROPs
0
32
Tensor Cores
1216
—
L1 Cache
32 KB (per CU)
8 KB (per CU)
L2 Cache
32 MB
512 KB
L3 Cache
256 MB
—
Theoretical Performance
Pixel Rate
0 MPixel/s
22.88 GPixel/s
Texture Rate
2457.6 GTexel/s
40.04 GTexel/s
FP16 (half)
78.64 TFLOPS
—
FP32 (float)
78.64 TFLOPS
1.602 TFLOPS
FP64 (double)
39.32 TFLOPS
—
Graphics Processor
GPU Name
MI350 256CU
Blackcomb
Architecture
CDNA 4.0
TeraScale 2
Foundry
TSMC
TSMC
Process Size
3 nm
40 nm
Transistors
185 billion
1.7 billion
Die Size
Unknown
212 mm²
GPU Variant
—
Blackcomb XTX(216-0811030)
Board Design
TDP
1400W
100W
Suggested PSU
1800 W
—
Outputs
No outputs
No outputs
Power Connectors
None
None
Graphics Features
DirectX
N/A
11.2 (11_0)
OpenGL
N/A
4.4
OpenCL
3.0
1.2
Vulkan
N/A
N/A
Shader Model
N/A
5.0
▲ Specs Compare
Data sourced from official specifications and benchmark tests.