AMD Radeon R9 270X vs NVIDIA GeForce GTX 660

VS

AMD Radeon R9 270X

NVIDIA GeForce GTX 660

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

Main Differences

AMD Radeon R9 270X 's Advantages

Released 1 years and 1 months late

Boost Clock has increased by 2% (1050MHz vs 1032MHz)

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

320 additional rendering cores

NVIDIA GeForce GTX 660 's Advantages

Lower TDP (140W vs 180W)

Score

Benchmark

FP32 (float)

Radeon R9 270X +35%

2.688 TFLOPS

GeForce GTX 660

1.981 TFLOPS

3DMark Time Spy

Radeon R9 270X +35%

1769

GeForce GTX 660

1308

Radeon R9 270X

VS

GeForce GTX 660

Graphics Card

Oct 2013

Release Date

Sep 2012

Volcanic Islands

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1000 MHz

Base Clock

980 MHz

1050 MHz

Boost Clock

1032 MHz

1400 MHz

Memory Clock

1502 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

192bit

179.2GB/s

Bandwidth

144.2GB/s

Render Config

20

Compute Units

-

1280

Shading Units

960

80

TMUs

80

32

ROPs

24

-

16 KB (per CU)

L1 Cache

16 KB (per SMX)

512 KB

L2 Cache

384 KB

-

Theoretical Performance

33.60 GPixel/s

Pixel Rate

20.64 GPixel/s

84.00 GTexel/s

Texture Rate

82.56 GTexel/s

-

2.688 TFLOPS

FP32 (float)

1.981 TFLOPS

168.0 GFLOPS

FP64 (double)

82.56 GFLOPS

Board Design

180W

TDP

140W

450 W

Suggested PSU

300 W

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

Outputs

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

2x 6-pin

Power Connectors

1x 6-pin

Graphics Processor

Curacao

GPU Name

GK106

Curacao XT (215-0848004)

GPU Variant

GK106-400-A1

GCN 1.0

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

2.8 billion

Transistors

2.54 billion

212 mm²

Die Size

221 mm²

Graphics Features

12 (11_1)

DirectX

12 (11_0)

4.6

OpenGL

4.6

1.2

OpenCL

3.0

1.2

Vulkan

1.1

-

CUDA

3.0

5.1

Shader Model

5.1

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