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 R7 250
CORE STATE
Cape Verde
VRAM
1024 MB
CLOCK SPEED
—
TDP
55 W
BUS WIDTH
128 bit
ARCHITECTURE
GCN 1.0
PROCESS
28 nm
LAUNCH DATE
2013
PERFORMANCE BENCHMARKS
geekbench_opencl
DETAILED SPECIFICATIONS
SPECIFICATION
HD 6850 X2
R7 250
Core Specs
Shading Units
960
512
-46.7%
Shaders
960
512
-46.7%
TMUs
48
32
-33.3%
ROPs
32
16
-50.0%
Compute Units
12
8
-33.3%
Clocks
GPU Clock
800 MHz
925 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
128 bit
Bandwidth
134.4 GB/s
28.80 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
14.80 GPixel/s
Texture Rate
38.40 GTexel/s
29.60 GTexel/s
FP32 (TFLOPS)
1.536 TFLOPS
947.2 GFLOPS
FP64 (TFLOPS)
—
59.20 GFLOPS (1:16)
Power
TDP
254 W
55 W
TDP (W)
254
55
-78.3%
Suggested PSU
600 W
250 W
Power Connectors
2x 8-pin
None
Architecture
Architecture
TeraScale 2
GCN 1.0
GPU Name
Barts
Cape Verde
Generation
Northern Islands
(HD 6800)
Volcanic Islands
(R7 200)
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
Single-slot
Length
—
168 mm
6.6 inches
Outputs
2x DVI1x HDMI 1.3a1x DisplayPort 1.1
1x DVI1x HDMI 1.4a1x DisplayPort 1.2
Bus Interface
PCIe 2.0 x16
PCIe 3.0 x16
Other
Production
End-of-life
End-of-life
Predecessor
Evergreen
Sea Islands
Successor
Southern Islands
Pirate Islands