GPU Comparison
RADEON
AMD Radeon R5 M255
CORE STATE
Topaz
VRAM
2 GB
CLOCK SPEED
940 MHz
TDP
—
BUS WIDTH
128 bit
ARCHITECTURE
GCN 3.0
PROCESS
28 nm
LAUNCH DATE
2014
VS
GEFORCE
GeForce GTX 660
CORE STATE
GK106
VRAM
2 GB
CLOCK SPEED
1032 MHz
TDP
140 W
BUS WIDTH
192 bit
ARCHITECTURE
Kepler
PROCESS
28 nm
LAUNCH DATE
2012
PERFORMANCE BENCHMARKS
geekbench_opencl
geekbench_metal
geekbench_vulkan
DETAILED SPECIFICATIONS
SPECIFICATION
R5 M255
GTX 660
Core Specs
Shading Units
384
960
+150.0%
Shaders
384
960
+150.0%
TMUs
24
80
+233.3%
ROPs
8
24
+200.0%
Compute Units
6
—
Clocks
Base Clock
925 MHz
980 MHz
Boost Clock
940 MHz
1032 MHz
Memory Clock
1000 MHz
2 Gbps effective
1502 MHz
6 Gbps effective
Memory
Memory Size
2 GB
2 GB
VRAM (MB)
2,048
2,048
0.0%
Memory Type
DDR3
GDDR5
Memory Bus
128 bit
192 bit
Bandwidth
32.00 GB/s
144.2 GB/s
Cache
L1 Cache
16 KB (per CU)
16 KB (per SMX)
L2 Cache
256 KB
384 KB
Performance
Pixel Rate
7.520 GPixel/s
20.64 GPixel/s
Texture Rate
22.56 GTexel/s
82.56 GTexel/s
FP32 (TFLOPS)
721.9 GFLOPS
1.981 TFLOPS
FP64 (TFLOPS)
45.12 GFLOPS (1:16)
82.56 GFLOPS (1:24)
FP16 (TFLOPS)
721.9 GFLOPS (1:1)
—
Power
TDP
—
140 W
TDP (W)
—
140
Suggested PSU
—
300 W
Power Connectors
—
1x 6-pin
Architecture
Architecture
GCN 3.0
Kepler
GPU Name
Topaz
GK106
Generation
Gem System
(R5 M200)
GeForce 600
Process Size
28 nm
28 nm
Transistors
1,550 million
2,540 million
Die Size
125 mm²
221 mm²
Foundry
TSMC
TSMC
Density
12.4M / mm²
11.5M / mm²
API Support
DirectX
12 (12_0)
12 (11_0)
OpenGL
4.6
4.6
Vulkan
1.2.170
1.2.175
OpenCL
2.1
3.0
CUDA
—
3.0
Shader Model
6.5
6.5 (5.1)
Physical
Slot Width
—
Dual-slot
Length
—
241 mm
9.5 inches
Outputs
—
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
Bus Interface
PCIe 3.0 x8
PCIe 3.0 x16
Other
Launch Price
—
229 USD
Production
End-of-life
End-of-life
Predecessor
Solar System
GeForce 500
Successor
Polaris Mobile
GeForce 700