AMD Radeon HD 7870 GHz Edition vs AMD Radeon Sky 900

GPU · Specs Compare

Products
GPU AMD Radeon HD 7870 GHz Edition AMD · 2012-03
GPU AMD Radeon Sky 900 AMD · 2013-03
Graphics Card
Release Date
Mar 2012
Mar 2013
Generation
Southern Islands
Radeon Sky
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1200 MHz
1250 MHz
Base Clock
—
825 MHz
Boost Clock
—
950 MHz
Memory
Memory Size
2GB
3GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
384bit
Bandwidth
153.6GB/s
240.0GB/s
Render Config
Compute Units
20
28
Shading Units
1280
1792
TMUs
80
112
ROPs
32
32
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
768 KB
Theoretical Performance
Pixel Rate
32.00 GPixel/s
30.40 GPixel/s
Texture Rate
80.00 GTexel/s
106.4 GTexel/s
FP32 (float)
2.560 TFLOPS
3.405 TFLOPS
FP64 (double)
160.0 GFLOPS
851.2 GFLOPS
Graphics Processor
GPU Name
Pitcairn
Tahiti
GPU Variant
Pitcairn XT(215-0828047)
Orthrus
Architecture
GCN 1.0
GCN 1.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
2.8 billion
4.313 billion
Die Size
212 mm²
352 mm²
Board Design
TDP
175W
300W
Suggested PSU
450 W
700 W
Outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
1x DVI1x mini-DisplayPort 1.2
Power Connectors
2x 6-pin
2x 8-pin
Graphics Features
DirectX
12 (11_1)
12 (11_1)
OpenGL
4.6
4.6
OpenCL
1.2
1.2
Vulkan
1.2
1.2
Shader Model
5.1
5.1
▲ Specs Compare Data sourced from official specifications and benchmark tests.