AMD Radeon HD 7970M vs AMD Radeon R9 285X
GPU Specs Compare
Graphics Card
Release Date
Apr 2012
Unknown
Generation
London
Volcanic Islands
Type
Mobile
Desktop
Bus Interface
MXM-B (3.0)
PCIe 3.0 x16
Clock Speeds
Memory Clock
1200 MHz
1375 MHz
Memory
Memory Size
2GB
3GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
384bit
Bandwidth
153.6GB/s
264.0GB/s
Render Config
Compute Units
20
32
Shading Units
1280
2048
TMUs
80
128
ROPs
32
32
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
768 KB
Theoretical Performance
Pixel Rate
27.20 GPixel/s
32.06 GPixel/s
Texture Rate
68.00 GTexel/s
128.3 GTexel/s
FP32 (float)
2.176 TFLOPS
4.104 TFLOPS
FP64 (double)
136.0 GFLOPS
-
Graphics Processor
GPU Name
Wimbledon
Tonga
GPU Variant
Wimbledon XT(216-0836036)
Tonga XT(215-0851313)
Architecture
GCN 1.0
GCN 3.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
2.8 billion
5 billion
Die Size
212 mm²
366 mm²
Board Design
TDP
100W
200W
Outputs
No outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
Power Connectors
None
1x 6-pin + 1x 8-pin
Suggested PSU
-
550 W
Graphics Features
DirectX
12 (11_1)
12 (12_0)
OpenGL
4.6
4.6
OpenCL
1.2
2.0
Vulkan
1.2
1.2
Shader Model
5.1
6.3