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GPU Comparison
AMD Radeon R9 M390X vs AMD Radeon HD 6990M
AMD Radeon R9 M390X vs AMD Radeon HD 6990M
VS
AMD Radeon R9 M390X
AMD Radeon HD 6990M
We compared two Mobile platform GPUs: 4GB VRAM Radeon R9 M390X and 2GB VRAM Radeon HD 6990M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon R9 M390X 's Advantages
Released 3 years and 10 months late
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (160.0GB/s vs 115.2GB/s)
928 additional rendering cores
Lower TDP (75W vs 100W)
Score
Benchmark
FP32 (float)
Radeon R9 M390X
+84%
2.961 TFLOPS
Radeon HD 6990M
1.602 TFLOPS
Radeon R9 M390X
VS
Radeon HD 6990M
Graphics Card
May 2015
Release Date
Jul 2011
Crystal System
Generation
Vancouver
Mobile
Type
Mobile
PCIe 3.0 x16
Bus Interface
MXM-B (3.0)
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
1250 MHz
Memory Clock
900 MHz
Memory
4GB
Memory Size
2GB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
256bit
160.0GB/s
Bandwidth
115.2GB/s
Render Config
-
SM Count
-
32
Compute Units
14
2048
Shading Units
1120
128
TMUs
56
32
ROPs
32
-
Tensor Cores
-
-
RT Cores
-
16 KB (per CU)
L1 Cache
8 KB (per CU)
512 KB
L2 Cache
512 KB
Theoretical Performance
23.14 GPixel/s
Pixel Rate
22.88 GPixel/s
92.54 GTexel/s
Texture Rate
40.04 GTexel/s
2.961 TFLOPS
FP16 (half)
-
2.961 TFLOPS
FP32 (float)
1.602 TFLOPS
185.1 GFLOPS
FP64 (double)
-
Graphics Processor
Amethyst
GPU Name
Blackcomb
Amethyst XT
GPU Variant
Blackcomb XTX (216-0811030)
GCN 3.0
Architecture
TeraScale 2
TSMC
Foundry
TSMC
28 nm
Process Size
40 nm
5 billion
Transistors
1.7 billion
366 mm²
Die Size
212 mm²
Board Design
75W
TDP
100W
-
Suggested PSU
-
No outputs
Outputs
No outputs
None
Power Connectors
None
Graphics Features
12 (12_0)
DirectX
11.2 (11_0)
4.6
OpenGL
4.4
2.0
OpenCL
1.2
1.2
Vulkan
N/A
-
CUDA
-
6.3
Shader Model
5.0
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