AMD Radeon HD 6850 vs AMD Radeon HD 6870
GPU Specs Compare
Graphics Card
Release Date
Oct 2010
Oct 2010
Generation
Northern Islands
Northern Islands
Type
Desktop
Desktop
Bus Interface
PCIe 2.0 x16
PCIe 2.0 x16
Clock Speeds
Memory Clock
1000 MHz
1050 MHz
Memory
Memory Size
1024MB
1024MB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
256bit
Bandwidth
128.0GB/s
134.4GB/s
Render Config
Compute Units
12
14
Shading Units
960
1120
TMUs
48
56
ROPs
32
32
L1 Cache
8 KB (per CU)
8 KB (per CU)
L2 Cache
512 KB
512 KB
Theoretical Performance
Pixel Rate
24.80 GPixel/s
28.80 GPixel/s
Texture Rate
37.20 GTexel/s
50.40 GTexel/s
FP32 (float)
1488 GFLOPS
2.016 TFLOPS
Graphics Processor
GPU Name
Barts
Barts
GPU Variant
Barts PRO(215-0798006)
Barts XT(215-0798000)
Architecture
TeraScale 2
TeraScale 2
Foundry
TSMC
TSMC
Process Size
40 nm
40 nm
Transistors
1.7 billion
1.7 billion
Die Size
255 mm²
255 mm²
Board Design
TDP
127W
151W
Suggested PSU
300 W
450 W
Outputs
2x DVI1x HDMI 1.3a2x mini-DisplayPort 1.1
2x DVI1x HDMI 1.3a2x mini-DisplayPort 1.1
Power Connectors
1x 6-pin
2x 6-pin
Graphics Features
DirectX
11.2 (11_0)
11.2 (11_0)
OpenGL
4.4
4.4
OpenCL
1.2
1.2
Vulkan
N/A
N/A
Shader Model
5.0
5.0