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GPU Comparison
AMD Radeon RX 6600S vs AMD Radeon R9 M390X
AMD Radeon RX 6600S vs AMD Radeon R9 M390X
VS
AMD Radeon RX 6600S
AMD Radeon R9 M390X
We compared two Mobile platform GPUs: 4GB VRAM Radeon RX 6600S and 4GB VRAM Radeon R9 M390X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon RX 6600S 's Advantages
Released 6 years and 8 months late
Boost Clock2000MHz
Larger VRAM bandwidth (224.0GB/s vs 160.0GB/s)
AMD Radeon R9 M390X 's Advantages
256 additional rendering cores
Lower TDP (75W vs 80W)
Score
Benchmark
FP32 (float)
Radeon RX 6600S
+142%
7.168 TFLOPS
Radeon R9 M390X
2.961 TFLOPS
Radeon RX 6600S
VS
Radeon R9 M390X
Graphics Card
Jan 2022
Release Date
May 2015
Mobility Radeon
Generation
Crystal System
Mobile
Type
Mobile
PCIe 4.0 x8
Bus Interface
PCIe 3.0 x16
Clock Speeds
1700 MHz
Base Clock
-
2000 MHz
Boost Clock
-
1750 MHz
Memory Clock
1250 MHz
Memory
4GB
Memory Size
4GB
GDDR6
Memory Type
GDDR5
128bit
Memory Bus
256bit
224.0GB/s
Bandwidth
160.0GB/s
Render Config
-
SM Count
-
28
Compute Units
32
1792
Shading Units
2048
112
TMUs
128
64
ROPs
32
-
Tensor Cores
-
28
RT Cores
-
128 KB per Array
L1 Cache
16 KB (per CU)
2 MB
L2 Cache
512 KB
Theoretical Performance
128.0 GPixel/s
Pixel Rate
23.14 GPixel/s
224.0 GTexel/s
Texture Rate
92.54 GTexel/s
14.34 TFLOPS
FP16 (half)
2.961 TFLOPS
7.168 TFLOPS
FP32 (float)
2.961 TFLOPS
448.0 GFLOPS
FP64 (double)
185.1 GFLOPS
Graphics Processor
Navi 23
GPU Name
Amethyst
-
GPU Variant
Amethyst XT
RDNA 2.0
Architecture
GCN 3.0
TSMC
Foundry
TSMC
7 nm
Process Size
28 nm
11.06 billion
Transistors
5 billion
237 mm²
Die Size
366 mm²
Board Design
80W
TDP
75W
-
Suggested PSU
-
No outputs
Outputs
No outputs
None
Power Connectors
None
Graphics Features
12 Ultimate (12_2)
DirectX
12 (12_0)
4.6
OpenGL
4.6
2.1
OpenCL
2.0
1.3
Vulkan
1.2
-
CUDA
-
6.5
Shader Model
6.3
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