AMD Steam Machine GPU vs AMD Radeon R9 M390 Mac Edition
GPU Specs Compare
Graphics Card
Release Date
Jan 2026
May 2015
Generation
Console GPU
Crystal System
Type
Desktop
Mobile
Bus Interface
-
PCIe 3.0 x16
Clock Speeds
Base Clock
1720 MHz
-
Boost Clock
2450 MHz
-
Memory Clock
2250 MHz
1365 MHz
Memory
Memory Size
8GB
2GB
Memory Type
GDDR6
GDDR5
Memory Bus
128bit
256bit
Bandwidth
288.0GB/s
174.7GB/s
Render Config
Compute Units
28
16
Shading Units
1792
1024
TMUs
112
64
ROPs
64
32
RT Cores
28
-
L1 Cache
128 KB per Array
16 KB (per CU)
L2 Cache
2 MB
512 KB
L3 Cache
32 MB
-
Theoretical Performance
Pixel Rate
156.8 GPixel/s
30.66 GPixel/s
Texture Rate
274.4 GTexel/s
61.31 GTexel/s
FP16 (half)
35.12 TFLOPS
-
FP32 (float)
17.56 TFLOPS
1.962 TFLOPS
FP64 (double)
548.8 GFLOPS
122.6 GFLOPS
Graphics Processor
GPU Name
Navi 33
Pitcairn
Architecture
RDNA 3.0
GCN 1.0
Foundry
TSMC
TSMC
Process Size
6 nm
28 nm
Transistors
13.3 billion
2.8 billion
Die Size
204 mm²
212 mm²
GPU Variant
-
Pitcairn PRO(215-0828062)
Board Design
TDP
110W
80W
Outputs
No outputs
No outputs
Power Connectors
None
None
Graphics Features
DirectX
12 Ultimate (12_2)
12 (11_1)
OpenGL
4.6
4.6
OpenCL
2.2
1.2
Vulkan
1.4
1.2
Shader Model
6.8
5.1