NVIDIA GeForce GTX 660 vs AMD Radeon R7 250X

VS

NVIDIA GeForce GTX 660

AMD Radeon R7 250X

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 and 1024MB VRAM Radeon R7 250X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 660 's Advantages

Boost Clock1032MHz

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (144.2GB/s vs 72.00GB/s)

320 additional rendering cores

AMD Radeon R7 250X 's Advantages

Released 1 years and 5 months late

Lower TDP (80W vs 140W)

Score

Benchmark

FP32 (float)

GeForce GTX 660 +62%

1.981 TFLOPS

Radeon R7 250X

1.216 TFLOPS

GeForce GTX 660

VS

Radeon R7 250X

Graphics Card

Sep 2012

Release Date

Feb 2014

GeForce 600

Generation

Volcanic Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

980 MHz

Base Clock

-

1032 MHz

Boost Clock

-

1502 MHz

Memory Clock

1125 MHz

Memory

2GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

192bit

Memory Bus

128bit

144.2GB/s

Bandwidth

72.00GB/s

Render Config

-

Compute Units

10

-

960

Shading Units

640

80

TMUs

40

24

ROPs

16

-

16 KB (per SMX)

L1 Cache

16 KB (per CU)

384 KB

L2 Cache

256 KB

-

Theoretical Performance

20.64 GPixel/s

Pixel Rate

15.20 GPixel/s

82.56 GTexel/s

Texture Rate

38.00 GTexel/s

-

1.981 TFLOPS

FP32 (float)

1216 GFLOPS

82.56 GFLOPS

FP64 (double)

76.00 GFLOPS

Board Design

140W

TDP

80W

300 W

Suggested PSU

250 W

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

Outputs

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

1x 6-pin

Power Connectors

1x 6-pin

Graphics Processor

GK106

GPU Name

Cape Verde

GK106-400-A1

GPU Variant

Cape Verde XT

Kepler

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

2.54 billion

Transistors

1.5 billion

221 mm²

Die Size

123 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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