AMD Radeon HD 8950 OEM vs AMD Radeon HD 6850 X2
GPU · Specs Compare
Graphics Card
Release Date
Jan 2013
Sep 2011
Generation
Sea Islands
Northern Islands
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 2.0 x16
Clock Speeds
Base Clock
850 MHz
—
Boost Clock
925 MHz
—
Memory Clock
1250 MHz
1050 MHz
Memory
Memory Size
3GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
384bit
256bit
Bandwidth
240.0GB/s
134.4GB/s
Render Config
Compute Units
28
12
Shading Units
1792
960
TMUs
112
48
ROPs
32
32
L1 Cache
16 KB (per CU)
8 KB (per CU)
L2 Cache
768 KB
512 KB
Theoretical Performance
Pixel Rate
29.60 GPixel/s
25.60 GPixel/s
Texture Rate
103.6 GTexel/s
38.40 GTexel/s
FP32 (float)
3.315 TFLOPS
1.536 TFLOPS
FP64 (double)
828.8 GFLOPS
—
Graphics Processor
GPU Name
Tahiti
Barts
GPU Variant
Tahiti PRO(215-0821056)
Barts PRO(215-0798006)
Architecture
GCN 1.0
TeraScale 2
Foundry
TSMC
TSMC
Process Size
28 nm
40 nm
Transistors
4.313 billion
1.7 billion
Die Size
352 mm²
255 mm²
Board Design
TDP
200W
254W
Suggested PSU
550 W
600 W
Outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
2x DVI1x HDMI 1.3a1x DisplayPort 1.1
Power Connectors
2x 6-pin
2x 8-pin
Graphics Features
DirectX
12 (11_1)
11.2 (11_0)
OpenGL
4.6
4.4
OpenCL
1.2
1.2
Vulkan
1.2
N/A
Shader Model
5.1
5.0
▲ Specs Compare
Data sourced from official specifications and benchmark tests.