AMD Radeon HD 6850 1440SP Edition vs AMD Radeon HD 8870 OEM
GPU Specs Compare
Graphics Card
Release Date
Aug 2012
Jan 2013
Generation
Northern Islands
Sea Islands
Type
Desktop
Desktop
Bus Interface
PCIe 2.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1000 MHz
1200 MHz
Memory
Memory Size
1024MB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
256bit
Bandwidth
128.0GB/s
153.6GB/s
Render Config
Compute Units
18
20
Shading Units
1440
1280
TMUs
72
80
ROPs
32
32
L1 Cache
8 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
512 KB
Theoretical Performance
Pixel Rate
23.20 GPixel/s
32.00 GPixel/s
Texture Rate
52.20 GTexel/s
80.00 GTexel/s
FP32 (float)
2.088 TFLOPS
2.560 TFLOPS
FP64 (double)
417.6 GFLOPS
160.0 GFLOPS
Graphics Processor
GPU Name
Cypress
Pitcairn
GPU Variant
Cypress PRO(215-0735043)
Pitcairn XT(215-0828047)
Architecture
TeraScale 2
GCN 1.0
Foundry
TSMC
TSMC
Process Size
40 nm
28 nm
Transistors
2.154 billion
2.8 billion
Die Size
334 mm²
212 mm²
Board Design
TDP
151W
175W
Suggested PSU
450 W
450 W
Outputs
2x DVI1x HDMI 1.3a1x DisplayPort 1.1
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Power Connectors
2x 6-pin
2x 6-pin
Graphics Features
DirectX
11.2 (11_0)
12 (11_1)
OpenGL
4.4
4.6
OpenCL
1.2
1.2
Vulkan
N/A
1.2
Shader Model
5.0
5.1