AMD Radeon R9 285 vs AMD Radeon R9 M280X
GPU Specs Compare
Graphics Card
Release Date
Sep 2014
Feb 2015
Generation
Volcanic Islands
Gem System
Type
Desktop
Mobile
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1375 MHz
1375 MHz
Base Clock
-
900 MHz
Boost Clock
-
1000 MHz
Memory
Memory Size
2GB
4GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
128bit
Bandwidth
176.0GB/s
88.00GB/s
Render Config
Compute Units
28
14
Shading Units
1792
896
TMUs
112
56
ROPs
32
16
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
256 KB
Theoretical Performance
Pixel Rate
29.38 GPixel/s
16.00 GPixel/s
Texture Rate
102.8 GTexel/s
56.00 GTexel/s
FP16 (half)
3.290 TFLOPS
-
FP32 (float)
3.290 TFLOPS
1.792 TFLOPS
FP64 (double)
205.6 GFLOPS
112.0 GFLOPS
Graphics Processor
GPU Name
Tonga
Saturn
GPU Variant
Tonga PRO(215-0851128)
Saturn XT(216-0843024)
Architecture
GCN 3.0
GCN 2.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
5 billion
2.08 billion
Die Size
366 mm²
160 mm²
Board Design
TDP
190W
Unknown
Suggested PSU
450 W
-
Outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
Portable Device Dependent
Power Connectors
2x 6-pin
-
Graphics Features
DirectX
12 (12_0)
12 (12_0)
OpenGL
4.6
4.6
OpenCL
2.1
2.1
Vulkan
1.2.170
1.2.170
Shader Model
6.5
6.5