AMD Radeon R9 270 vs NVIDIA GeForce GTX 660 Rev. 2
GPU · Specs Compare
Graphics Card
Release Date
Nov 2013
Sep 2014
Generation
Volcanic Islands
GeForce 600
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
900 MHz
980 MHz
Boost Clock
925 MHz
1032 MHz
Memory Clock
1400 MHz
1502 MHz
Memory
Memory Size
2GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
192bit
Bandwidth
179.2GB/s
144.2GB/s
Render Config
Compute Units
20
—
Shading Units
1280
960
TMUs
80
80
ROPs
32
24
L1 Cache
16 KB (per CU)
16 KB (per SMX)
L2 Cache
512 KB
384 KB
Theoretical Performance
Pixel Rate
29.60 GPixel/s
20.64 GPixel/s
Texture Rate
74.00 GTexel/s
82.56 GTexel/s
FP32 (float)
2.368 TFLOPS
1.981 TFLOPS
FP64 (double)
148.0 GFLOPS
82.56 GFLOPS
Graphics Processor
GPU Name
Curacao
GK104
GPU Variant
Curacao PRO(215-0848000)
—
Architecture
GCN 1.0
Kepler
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
2.8 billion
3.54 billion
Die Size
212 mm²
294 mm²
Board Design
TDP
150W
140W
Suggested PSU
450 W
300 W
Outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
Power Connectors
1x 6-pin
1x 6-pin
Graphics Features
DirectX
12 (11_1)
12 (11_0)
OpenGL
4.6
4.6
OpenCL
1.2
3.0
Vulkan
1.2
1.1
Shader Model
5.1
5.1
CUDA
—
3.0
Benchmark
3DMark Time Spy
1,603
—
▲ Specs Compare
Data sourced from official specifications and benchmark tests.