AMD Radeon HD 6490M Mac Edition vs AMD Radeon R9 M395X Mac Edition
We compared two Mobile platform GPUs: 256MB VRAM Radeon HD 6490M Mac Edition and 4GB VRAM Radeon R9 M395X Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon R9 M395X Mac Edition 's Advantages
Released 4 years late
More VRAM (4GB vs 256GB)
Larger VRAM bandwidth (174.7GB/s vs 25.41GB/s)
1888 additional rendering cores
Score
Benchmark
FP32 (float)
Radeon HD 6490M Mac Edition
0.24 TFLOPS
Radeon R9 M395X Mac Edition
+1451%
3.723 TFLOPS
Graphics Card
May 2011
Release Date
May 2015
Vancouver
Generation
Crystal System
Mobile
Type
Mobile
PCIe 2.0 x16
Bus Interface
MXM-B (3.0)
Clock Speeds
-
-
-
-
-
-
794 MHz
Memory Clock
1365 MHz
Memory
256MB
Memory Size
4GB
GDDR5
Memory Type
GDDR5
64bit
Memory Bus
256bit
25.41GB/s
Bandwidth
174.7GB/s
Render Config
2
Compute Units
32
-
-
-
160
Shading Units
2048
8
TMUs
128
4
ROPs
32
-
-
-
-
-
-
8 KB (per CU)
L1 Cache
16 KB (per CU)
128 KB
L2 Cache
512 KB
-
-
-
Theoretical Performance
3.000 GPixel/s
Pixel Rate
29.09 GPixel/s
6.000 GTexel/s
Texture Rate
116.4 GTexel/s
-
FP16 (half)
3.723 TFLOPS
240.0 GFLOPS
FP32 (float)
3.723 TFLOPS
-
FP64 (double)
232.7 GFLOPS
Board Design
Unknown
TDP
250W
-
-
-
Portable Device Dependent
Outputs
No outputs
-
Power Connectors
None
Graphics Processor
Seymour
GPU Name
Amethyst
Seymour XTX M2
(216-0809000)
GPU Variant
Amethyst XT
TeraScale 2
Architecture
GCN 3.0
TSMC
Foundry
TSMC
40 nm
Process Size
28 nm
0.37 billion
Transistors
5 billion
67 mm²
Die Size
366 mm²
Graphics Features
11.2 (11_0)
DirectX
12 (12_0)
4.4
OpenGL
4.6
1.2
OpenCL
2.0
N/A
Vulkan
1.2
-
-
-
5.0
Shader Model
6.3
