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GPU Comparison
AMD Radeon R9 M390X vs AMD Radeon HD 8790M
AMD Radeon R9 M390X vs AMD Radeon HD 8790M
VS
AMD Radeon R9 M390X
AMD Radeon HD 8790M
We compared two Mobile platform GPUs: 4GB VRAM Radeon R9 M390X and 2GB VRAM Radeon HD 8790M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon R9 M390X 's Advantages
Released 2 years and 1 months late
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (160.0GB/s vs 64.00GB/s)
1664 additional rendering cores
AMD Radeon HD 8790M 's Advantages
Boost Clock900MHz
Score
Benchmark
FP32 (float)
Radeon R9 M390X
+328%
2.961 TFLOPS
Radeon HD 8790M
0.691 TFLOPS
Radeon R9 M390X
VS
Radeon HD 8790M
Graphics Card
May 2015
Release Date
Apr 2013
Crystal System
Generation
Solar System
Mobile
Type
Mobile
PCIe 3.0 x16
Bus Interface
MXM-A (3.0)
Clock Speeds
-
Base Clock
850 MHz
-
Boost Clock
900 MHz
1250 MHz
Memory Clock
1000 MHz
Memory
4GB
Memory Size
2GB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
128bit
160.0GB/s
Bandwidth
64.00GB/s
Render Config
-
SM Count
-
32
Compute Units
6
2048
Shading Units
384
128
TMUs
24
32
ROPs
8
-
Tensor Cores
-
-
RT Cores
-
16 KB (per CU)
L1 Cache
16 KB (per CU)
512 KB
L2 Cache
256 KB
Theoretical Performance
23.14 GPixel/s
Pixel Rate
7.200 GPixel/s
92.54 GTexel/s
Texture Rate
21.60 GTexel/s
2.961 TFLOPS
FP16 (half)
-
2.961 TFLOPS
FP32 (float)
691.2 GFLOPS
185.1 GFLOPS
FP64 (double)
43.20 GFLOPS
Graphics Processor
Amethyst
GPU Name
Mars
Amethyst XT
GPU Variant
Mars M2 XTX (216-0842036)
GCN 3.0
Architecture
GCN 1.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
5 billion
Transistors
0.95 billion
366 mm²
Die Size
77 mm²
Board Design
75W
TDP
Unknown
-
Suggested PSU
-
No outputs
Outputs
Portable Device Dependent
None
Power Connectors
None
Graphics Features
12 (12_0)
DirectX
12 (11_1)
4.6
OpenGL
4.6
2.0
OpenCL
2.1 (1.2)
1.2
Vulkan
1.2.170
-
CUDA
-
6.3
Shader Model
6.5 (5.1)
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