NVIDIA GeForce GTX 660 Rev. 2 vs AMD Radeon R9 270

VS

NVIDIA GeForce GTX 660 Rev. 2

AMD Radeon R9 270

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 Rev. 2 and 2GB VRAM Radeon R9 270 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 660 Rev. 2 's Advantages

Released 10 months late

Boost Clock has increased by 12% (1032MHz vs 925MHz)

Lower TDP (140W vs 150W)

AMD Radeon R9 270 's Advantages

Larger VRAM bandwidth (179.2GB/s vs 144.2GB/s)

320 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GTX 660 Rev. 2

1.981 TFLOPS

Radeon R9 270 +19%

2.368 TFLOPS

GeForce GTX 660 Rev. 2

VS

Radeon R9 270

Graphics Card

Sep 2014

Release Date

Nov 2013

GeForce 600

Generation

Volcanic Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

980 MHz

Base Clock

900 MHz

1032 MHz

Boost Clock

925 MHz

1502 MHz

Memory Clock

1400 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

192bit

Memory Bus

256bit

144.2GB/s

Bandwidth

179.2GB/s

Render Config

-

Compute Units

20

-

960

Shading Units

1280

80

TMUs

80

24

ROPs

32

-

16 KB (per SMX)

L1 Cache

16 KB (per CU)

384 KB

L2 Cache

512 KB

-

Theoretical Performance

20.64 GPixel/s

Pixel Rate

29.60 GPixel/s

82.56 GTexel/s

Texture Rate

74.00 GTexel/s

-

1.981 TFLOPS

FP32 (float)

2.368 TFLOPS

82.56 GFLOPS

FP64 (double)

148.0 GFLOPS

Board Design

140W

TDP

150W

300 W

Suggested PSU

450 W

2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

Outputs

2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

1x 6-pin

Power Connectors

1x 6-pin

Graphics Processor

GK104

GPU Name

Curacao

-

GPU Variant

Curacao PRO (215-0848000)

Kepler

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

3.54 billion

Transistors

2.8 billion

294 mm²

Die Size

212 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

3.0

OpenCL

1.2

1.1

Vulkan

1.2

3.0

CUDA

-

5.1

Shader Model

5.1

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