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GPU Comparison
AMD Radeon R9 M390X vs ATI Mobility Radeon HD 3870
AMD Radeon R9 M390X vs ATI Mobility Radeon HD 3870
VS
AMD Radeon R9 M390X
ATI Mobility Radeon HD 3870
We compared two Mobile platform GPUs: 4GB VRAM Radeon R9 M390X and 512MB VRAM Mobility Radeon HD 3870 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon R9 M390X 's Advantages
Released 6 years and 11 months late
Larger VRAM bandwidth (160.0GB/s vs 54.40GB/s)
1728 additional rendering cores
ATI Mobility Radeon HD 3870 's Advantages
Lower TDP (55W vs 75W)
Score
Benchmark
FP32 (float)
Radeon R9 M390X
+601%
2.961 TFLOPS
Mobility Radeon HD 3870
0.422 TFLOPS
Radeon R9 M390X
VS
Mobility Radeon HD 3870
Graphics Card
May 2015
Release Date
Jun 2008
Crystal System
Generation
M8x
Mobile
Type
Mobile
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
1250 MHz
Memory Clock
850 MHz
Memory
4GB
Memory Size
512MB
GDDR5
Memory Type
GDDR3
256bit
Memory Bus
256bit
160.0GB/s
Bandwidth
54.40GB/s
Render Config
-
SM Count
-
32
Compute Units
4
2048
Shading Units
320
128
TMUs
16
32
ROPs
16
-
Tensor Cores
-
-
RT Cores
-
16 KB (per CU)
L1 Cache
-
512 KB
L2 Cache
256 KB
Theoretical Performance
23.14 GPixel/s
Pixel Rate
10.56 GPixel/s
92.54 GTexel/s
Texture Rate
10.56 GTexel/s
2.961 TFLOPS
FP16 (half)
-
2.961 TFLOPS
FP32 (float)
422.4 GFLOPS
185.1 GFLOPS
FP64 (double)
84.48 GFLOPS
Graphics Processor
Amethyst
GPU Name
M88
Amethyst XT
GPU Variant
-
GCN 3.0
Architecture
TeraScale
TSMC
Foundry
TSMC
28 nm
Process Size
55 nm
5 billion
Transistors
0.666 billion
366 mm²
Die Size
192 mm²
Board Design
75W
TDP
55W
-
Suggested PSU
-
No outputs
Outputs
No outputs
None
Power Connectors
-
Graphics Features
12 (12_0)
DirectX
10.1 (10_1)
4.6
OpenGL
3.3
2.0
OpenCL
N/A
1.2
Vulkan
N/A
-
CUDA
-
6.3
Shader Model
4.1
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