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 R5 M255
CORE STATE
Topaz
VRAM
2 GB
CLOCK SPEED
940 MHz
TDP
—
BUS WIDTH
128 bit
ARCHITECTURE
GCN 3.0
PROCESS
28 nm
LAUNCH DATE
2014
PERFORMANCE BENCHMARKS
geekbench_opencl
DETAILED SPECIFICATIONS
SPECIFICATION
HD 6850 X2
R5 M255
Core Specs
Shading Units
960
384
-60.0%
Shaders
960
384
-60.0%
TMUs
48
24
-50.0%
ROPs
32
8
-75.0%
Compute Units
12
6
-50.0%
Clocks
Base Clock
—
925 MHz
Boost Clock
—
940 MHz
GPU Clock
800 MHz
—
Memory Clock
1050 MHz
4.2 Gbps effective
1000 MHz
2 Gbps effective
Memory
Memory Size
2 GB
2 GB
VRAM (MB)
2,048
2,048
0.0%
Memory Type
GDDR5
DDR3
Memory Bus
256 bit
128 bit
Bandwidth
134.4 GB/s
32.00 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
7.520 GPixel/s
Texture Rate
38.40 GTexel/s
22.56 GTexel/s
FP32 (TFLOPS)
1.536 TFLOPS
721.9 GFLOPS
FP64 (TFLOPS)
—
45.12 GFLOPS (1:16)
FP16 (TFLOPS)
—
721.9 GFLOPS (1:1)
Power
TDP
254 W
—
TDP (W)
254
—
Suggested PSU
600 W
—
Power Connectors
2x 8-pin
—
Architecture
Architecture
TeraScale 2
GCN 3.0
GPU Name
Barts
Topaz
Generation
Northern Islands
(HD 6800)
Gem System
(R5 M200)
Process Size
40 nm
28 nm
Transistors
1,700 million
1,550 million
Die Size
255 mm²
125 mm²
Foundry
TSMC
TSMC
Density
6.7M / mm²
12.4M / mm²
API Support
DirectX
11.2 (11_0)
12 (12_0)
OpenGL
4.4
4.6
Vulkan
—
1.2.170
OpenCL
1.2
2.1
Shader Model
5.0
6.5
Physical
Slot Width
Dual-slot
—
Outputs
2x DVI1x HDMI 1.3a1x DisplayPort 1.1
—
Bus Interface
PCIe 2.0 x16
PCIe 3.0 x8
Other
Production
End-of-life
End-of-life
Predecessor
Evergreen
Solar System
Successor
Southern Islands
Polaris Mobile