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
GEFORCE
Tesla K80
CORE STATE
GK210
VRAM
12 GB
CLOCK SPEED
824 MHz
TDP
300 W
BUS WIDTH
384 bit
ARCHITECTURE
Kepler 2.0
PROCESS
28 nm
LAUNCH DATE
2014
PERFORMANCE BENCHMARKS
geekbench_opencl
geekbench_vulkan
DETAILED SPECIFICATIONS
SPECIFICATION
HD 6850 X2
Tesla K80
Core Specs
Shading Units
960
2,496
+160.0%
Shaders
960
2,496
+160.0%
TMUs
48
208
+333.3%
ROPs
32
48
+50.0%
Compute Units
12
—
Clocks
Base Clock
—
562 MHz
Boost Clock
—
824 MHz
GPU Clock
800 MHz
—
Memory Clock
1050 MHz
4.2 Gbps effective
1253 MHz
5 Gbps effective
Memory
Memory Size
2 GB
12 GB
VRAM (MB)
2,048
12,288
+500.0%
Memory Type
GDDR5
GDDR5
Memory Bus
256 bit
384 bit
Bandwidth
134.4 GB/s
240.6 GB/s
Cache
L1 Cache
8 KB (per CU)
16 KB (per SMX)
L2 Cache
512 KB
1536 KB
Performance
Pixel Rate
25.60 GPixel/s
42.85 GPixel/s
Texture Rate
38.40 GTexel/s
171.4 GTexel/s
FP32 (TFLOPS)
1.536 TFLOPS
4.113 TFLOPS
FP64 (TFLOPS)
—
1,371.1 GFLOPS (1:3)
Power
TDP
254 W
300 W
TDP (W)
254
300
+18.1%
Suggested PSU
600 W
700 W
Power Connectors
2x 8-pin
1x 8-pin
Architecture
Architecture
TeraScale 2
Kepler 2.0
GPU Name
Barts
GK210
Generation
Northern Islands
(HD 6800)
Tesla Kepler
(Kxx)
Process Size
40 nm
28 nm
Transistors
1,700 million
7,100 million
Die Size
255 mm²
561 mm²
Foundry
TSMC
TSMC
Density
6.7M / mm²
12.7M / mm²
API Support
DirectX
11.2 (11_0)
12 (11_1)
OpenGL
4.4
4.6
Vulkan
—
1.2.175
OpenCL
1.2
3.0
CUDA
—
3.7
Shader Model
5.0
6.5 (5.1)
Physical
Slot Width
Dual-slot
Dual-slot
Length
—
267 mm
10.5 inches
Outputs
2x DVI1x HDMI 1.3a1x DisplayPort 1.1
No outputs
Bus Interface
PCIe 2.0 x16
PCIe 3.0 x16
Other
Production
End-of-life
End-of-life
Predecessor
Evergreen
Tesla Fermi
Successor
Southern Islands
Tesla Maxwell