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
GEFORCE
GeForce 825M
CORE STATE
GK208
VRAM
1024 MB
CLOCK SPEED
941 MHz
TDP
33 W
BUS WIDTH
64 bit
ARCHITECTURE
Kepler 2.0
PROCESS
28 nm
LAUNCH DATE
2014
PERFORMANCE BENCHMARKS
geekbench_opencl
DETAILED SPECIFICATIONS
SPECIFICATION
HD 6850 X2
825M
Core Specs
Shading Units
960
384
-60.0%
Shaders
960
384
-60.0%
TMUs
48
32
-33.3%
ROPs
32
8
-75.0%
Compute Units
12
—
Clocks
Base Clock
—
850 MHz
Boost Clock
—
941 MHz
GPU Clock
800 MHz
—
Memory Clock
1050 MHz
4.2 Gbps effective
900 MHz
1800 Mbps effective
Memory
Memory Size
2 GB
1024 MB
VRAM (MB)
2,048
1,024
-50.0%
Memory Type
GDDR5
DDR3
Memory Bus
256 bit
64 bit
Bandwidth
134.4 GB/s
14.40 GB/s
Cache
L1 Cache
8 KB (per CU)
16 KB (per SMX)
L2 Cache
512 KB
512 KB
Performance
Pixel Rate
25.60 GPixel/s
7.528 GPixel/s
Texture Rate
38.40 GTexel/s
30.11 GTexel/s
FP32 (TFLOPS)
1.536 TFLOPS
722.7 GFLOPS
FP64 (TFLOPS)
—
30.11 GFLOPS (1:24)
Power
TDP
254 W
33 W
TDP (W)
254
33
-87.0%
Suggested PSU
600 W
—
Power Connectors
2x 8-pin
None
Architecture
Architecture
TeraScale 2
Kepler 2.0
GPU Name
Barts
GK208
Generation
Northern Islands
(HD 6800)
GeForce 800M
Process Size
40 nm
28 nm
Transistors
1,700 million
1,020 million
Die Size
255 mm²
87 mm²
Foundry
TSMC
TSMC
Density
6.7M / mm²
11.7M / mm²
API Support
DirectX
11.2 (11_0)
12 (11_0)
OpenGL
4.4
4.6
Vulkan
—
1.2.175
OpenCL
1.2
3.0
CUDA
—
3.5
Shader Model
5.0
6.5 (5.1)
Physical
Slot Width
Dual-slot
IGP
Outputs
2x DVI1x HDMI 1.3a1x DisplayPort 1.1
Portable Device Dependent
Bus Interface
PCIe 2.0 x16
PCIe 3.0 x8
Other
Production
End-of-life
End-of-life
Predecessor
Evergreen
GeForce 700M
Successor
Southern Islands
GeForce 900M