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 Vega 20
CORE STATE
Vega 12
VRAM
4 GB
CLOCK SPEED
1283 MHz
TDP
100 W
BUS WIDTH
1024 bit
ARCHITECTURE
GCN 5.0
PROCESS
14 nm
LAUNCH DATE
2018
PERFORMANCE BENCHMARKS
geekbench_opencl
geekbench_metal
geekbench_vulkan
DETAILED SPECIFICATIONS
SPECIFICATION
HD 6850 X2
Pro Vega 20
Core Specs
Shading Units
960
1,280
+33.3%
Shaders
960
1,280
+33.3%
TMUs
48
80
+66.7%
ROPs
32
32
0.0%
Compute Units
12
20
+66.7%
Clocks
Base Clock
—
815 MHz
Boost Clock
—
1283 MHz
GPU Clock
800 MHz
—
Memory Clock
1050 MHz
4.2 Gbps effective
740 MHz
1480 Mbps effective
Memory
Memory Size
2 GB
4 GB
VRAM (MB)
2,048
4,096
+100.0%
Memory Type
GDDR5
HBM2
Memory Bus
256 bit
1024 bit
Bandwidth
134.4 GB/s
189.4 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
41.06 GPixel/s
Texture Rate
38.40 GTexel/s
102.6 GTexel/s
FP32 (TFLOPS)
1.536 TFLOPS
3.284 TFLOPS
FP64 (TFLOPS)
—
205.3 GFLOPS (1:16)
FP16 (TFLOPS)
—
6.569 TFLOPS (2:1)
Power
TDP
254 W
100 W
TDP (W)
254
100
-60.6%
Suggested PSU
600 W
—
Power Connectors
2x 8-pin
—
Architecture
Architecture
TeraScale 2
GCN 5.0
GPU Name
Barts
Vega 12
Generation
Northern Islands
(HD 6800)
Radeon Pro Mac
(Vega Series)
Process Size
40 nm
14 nm
Transistors
1,700 million
—
Die Size
255 mm²
—
Foundry
TSMC
GlobalFoundries
Density
6.7M / mm²
—
API Support
DirectX
11.2 (11_0)
12 (12_1)
OpenGL
4.4
4.6
Vulkan
—
1.3
OpenCL
1.2
2.1
Shader Model
5.0
6.0
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 x16
Other
Production
End-of-life
End-of-life
Predecessor
Evergreen
—
Successor
Southern Islands
—