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 Pro 455
CORE STATE
Baffin
VRAM
2 GB
CLOCK SPEED
—
TDP
35 W
BUS WIDTH
128 bit
ARCHITECTURE
GCN 4.0
PROCESS
14 nm
LAUNCH DATE
2016
PERFORMANCE BENCHMARKS
geekbench_opencl
geekbench_metal
DETAILED SPECIFICATIONS
SPECIFICATION
HD 6850 X2
Pro 455
Core Specs
Shading Units
960
768
-20.0%
Shaders
960
768
-20.0%
TMUs
48
48
0.0%
ROPs
32
16
-50.0%
Compute Units
12
12
0.0%
Clocks
GPU Clock
800 MHz
855 MHz
Memory Clock
1050 MHz
4.2 Gbps effective
1270 MHz
5.1 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
81.28 GB/s
Cache
L1 Cache
8 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
1024 KB
Performance
Pixel Rate
25.60 GPixel/s
13.68 GPixel/s
Texture Rate
38.40 GTexel/s
41.04 GTexel/s
FP32 (TFLOPS)
1.536 TFLOPS
1,313.3 GFLOPS
FP64 (TFLOPS)
—
82.08 GFLOPS (1:16)
FP16 (TFLOPS)
—
1,313.3 GFLOPS (1:1)
Power
TDP
254 W
35 W
TDP (W)
254
35
-86.2%
Suggested PSU
600 W
—
Power Connectors
2x 8-pin
None
Architecture
Architecture
TeraScale 2
GCN 4.0
GPU Name
Barts
Baffin
Generation
Northern Islands
(HD 6800)
Radeon Pro Mac
(400 Series)
Process Size
40 nm
14 nm
Transistors
1,700 million
3,000 million
Die Size
255 mm²
123 mm²
Foundry
TSMC
GlobalFoundries
Density
6.7M / mm²
24.4M / mm²
API Support
DirectX
11.2 (11_0)
12 (12_0)
OpenGL
4.4
4.6
Vulkan
—
1.3
OpenCL
1.2
2.1
Shader Model
5.0
6.7
Physical
Slot Width
Dual-slot
MXM Module
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
—
Successor
Southern Islands
—