GPU Comparison
RADEON
AMD Radeon HD 6850 X2
CORE STATE
Barts
VRAM
2 GB
CLOCK SPEED
—
TDP
254 W
BUS WIDTH
256 bit
ARCHITECTURE
TeraScale 2
PROCESS
40 nm
LAUNCH DATE
2011
VS
RADEON
Radeon HD 8850M
CORE STATE
Venus
VRAM
2 GB
CLOCK SPEED
625 MHz
TDP
—
BUS WIDTH
128 bit
ARCHITECTURE
GCN 1.0
PROCESS
28 nm
LAUNCH DATE
2013
PERFORMANCE BENCHMARKS
geekbench_opencl
DETAILED SPECIFICATIONS
SPECIFICATION
HD 6850 X2
HD 8850M
Core Specs
Shading Units
960
640
-33.3%
Shaders
960
640
-33.3%
TMUs
48
40
-16.7%
ROPs
32
16
-50.0%
Compute Units
12
10
-16.7%
Clocks
Base Clock
—
575 MHz
Boost Clock
—
625 MHz
GPU Clock
800 MHz
—
Memory Clock
1050 MHz
4.2 Gbps effective
1000 MHz
4 Gbps effective
Memory
Memory Size
2 GB
2 GB
VRAM (MB)
2,048
2,048
0.0%
Memory Type
GDDR5
GDDR5
Memory Bus
256 bit
128 bit
Bandwidth
134.4 GB/s
64.00 GB/s
Cache
L1 Cache
8 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
256 KB
Performance
Pixel Rate
25.60 GPixel/s
10.00 GPixel/s
Texture Rate
38.40 GTexel/s
25.00 GTexel/s
FP32 (TFLOPS)
1.536 TFLOPS
800.0 GFLOPS
FP64 (TFLOPS)
—
50.00 GFLOPS (1:16)
Power
TDP
254 W
—
TDP (W)
254
—
Suggested PSU
600 W
—
Power Connectors
2x 8-pin
—
Architecture
Architecture
TeraScale 2
GCN 1.0
GPU Name
Barts
Venus
Generation
Northern Islands
(HD 6800)
Solar System
(HD 8800M)
Process Size
40 nm
28 nm
Transistors
1,700 million
1,500 million
Die Size
255 mm²
123 mm²
Foundry
TSMC
TSMC
Density
6.7M / mm²
12.2M / mm²
API Support
DirectX
11.2 (11_0)
12 (11_1)
OpenGL
4.4
4.6
Vulkan
—
1.2.170
OpenCL
1.2
2.1 (1.2)
Shader Model
5.0
6.5 (5.1)
Physical
Slot Width
Dual-slot
—
Outputs
2x DVI1x HDMI 1.3a1x DisplayPort 1.1
—
Bus Interface
PCIe 2.0 x16
PCIe 3.0 x16
Other
Production
End-of-life
End-of-life
Predecessor
Evergreen
London
Successor
Southern Islands
Gem System