AMD Radeon Sky 700 vs AMD Radeon HD 8870 OEM
GPU Specs Compare
Graphics Card
Release Date
Mar 2013
Jan 2013
Generation
Radeon Sky
Sea Islands
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1375 MHz
1200 MHz
Memory
Memory Size
6GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
384bit
256bit
Bandwidth
264.0GB/s
153.6GB/s
Render Config
Compute Units
28
20
Shading Units
1792
1280
TMUs
112
80
ROPs
32
32
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
768 KB
512 KB
Theoretical Performance
Pixel Rate
28.80 GPixel/s
32.00 GPixel/s
Texture Rate
100.8 GTexel/s
80.00 GTexel/s
FP32 (float)
3.226 TFLOPS
2.560 TFLOPS
FP64 (double)
806.4 GFLOPS
160.0 GFLOPS
Graphics Processor
GPU Name
Tahiti
Pitcairn
GPU Variant
Tahiti PRO GL
Pitcairn XT(215-0828047)
Architecture
GCN 1.0
GCN 1.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
4.313 billion
2.8 billion
Die Size
352 mm²
212 mm²
Board Design
TDP
225W
175W
Suggested PSU
550 W
450 W
Outputs
1x DisplayPort 1.2
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Power Connectors
1x 8-pin
2x 6-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