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 580
CORE STATE
Ellesmere
VRAM
8 GB
CLOCK SPEED
1200 MHz
TDP
185 W
BUS WIDTH
256 bit
ARCHITECTURE
GCN 4.0
PROCESS
14 nm
LAUNCH DATE
2017
PERFORMANCE BENCHMARKS
geekbench_opencl
geekbench_metal
geekbench_vulkan
DETAILED SPECIFICATIONS
SPECIFICATION
HD 6850 X2
Pro 580
Core Specs
Shading Units
960
2,304
+140.0%
Shaders
960
2,304
+140.0%
TMUs
48
144
+200.0%
ROPs
32
32
0.0%
Compute Units
12
36
+200.0%
Clocks
Base Clock
—
1100 MHz
Boost Clock
—
1200 MHz
GPU Clock
800 MHz
—
Memory Clock
1050 MHz
4.2 Gbps effective
1695 MHz
6.8 Gbps effective
Memory
Memory Size
2 GB
8 GB
VRAM (MB)
2,048
8,192
+300.0%
Memory Type
GDDR5
GDDR5
Memory Bus
256 bit
256 bit
Bandwidth
134.4 GB/s
217.0 GB/s
Cache
L1 Cache
8 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
2 MB
Performance
Pixel Rate
25.60 GPixel/s
38.40 GPixel/s
Texture Rate
38.40 GTexel/s
172.8 GTexel/s
FP32 (TFLOPS)
1.536 TFLOPS
5.530 TFLOPS
FP64 (TFLOPS)
—
345.6 GFLOPS (1:16)
FP16 (TFLOPS)
—
5.530 TFLOPS (1:1)
Power
TDP
254 W
185 W
TDP (W)
254
185
-27.2%
Suggested PSU
600 W
—
Power Connectors
2x 8-pin
None
Architecture
Architecture
TeraScale 2
GCN 4.0
GPU Name
Barts
Ellesmere
Generation
Northern Islands
(HD 6800)
Radeon Pro Mac
(500 Series)
Process Size
40 nm
14 nm
Transistors
1,700 million
5,700 million
Die Size
255 mm²
232 mm²
Foundry
TSMC
GlobalFoundries
Density
6.7M / mm²
24.6M / 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
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
—