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
GeForce GT 745M
CORE STATE
GK107
VRAM
2 GB
CLOCK SPEED
—
TDP
45 W
BUS WIDTH
128 bit
ARCHITECTURE
Kepler
PROCESS
28 nm
LAUNCH DATE
2013
PERFORMANCE BENCHMARKS
geekbench_opencl
DETAILED SPECIFICATIONS
SPECIFICATION
HD 6850 X2
GT 745M
Core Specs
Shading Units
960
384
-60.0%
Shaders
960
384
-60.0%
TMUs
48
32
-33.3%
ROPs
32
16
-50.0%
Compute Units
12
—
Clocks
GPU Clock
800 MHz
549 MHz
Memory Clock
1050 MHz
4.2 Gbps effective
1000 MHz
4 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
64.00 GB/s
Cache
L1 Cache
8 KB (per CU)
16 KB (per SMX)
L2 Cache
512 KB
256 KB
Performance
Pixel Rate
25.60 GPixel/s
4.392 GPixel/s
Texture Rate
38.40 GTexel/s
17.57 GTexel/s
FP32 (TFLOPS)
1.536 TFLOPS
421.6 GFLOPS
FP64 (TFLOPS)
—
17.57 GFLOPS (1:24)
Power
TDP
254 W
45 W
TDP (W)
254
45
-82.3%
Suggested PSU
600 W
—
Power Connectors
2x 8-pin
—
Architecture
Architecture
TeraScale 2
Kepler
GPU Name
Barts
GK107
Generation
Northern Islands
(HD 6800)
GeForce 700M
Process Size
40 nm
28 nm
Transistors
1,700 million
1,270 million
Die Size
255 mm²
118 mm²
Foundry
TSMC
TSMC
Density
6.7M / mm²
10.8M / mm²
API Support
DirectX
11.2 (11_0)
12 (11_0)
OpenGL
4.4
4.6
Vulkan
—
1.2.175
OpenCL
1.2
3.0
CUDA
—
3.0
Shader Model
5.0
6.5 (5.1)
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
GeForce 600M
Successor
Southern Islands
GeForce 800M