NVIDIA GeForce GTX 660 vs AMD Radeon HD 7720 OEM

VS

NVIDIA GeForce GTX 660

AMD Radeon HD 7720 OEM

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 and 1024MB VRAM Radeon HD 7720 OEM 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 134.4GB/s)

160 additional rendering cores

Lower TDP (140W vs 150W)

AMD Radeon HD 7720 OEM 's Advantages

Released 6 months late

Score

Benchmark

FP32 (float)

GeForce GTX 660 +47%

1.981 TFLOPS

Radeon HD 7720 OEM

1.344 TFLOPS

GeForce GTX 660

VS

Radeon HD 7720 OEM

Graphics Card

Sep 2012

Release Date

Mar 2013

GeForce 600

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

980 MHz

Base Clock

-

1032 MHz

Boost Clock

-

1502 MHz

Memory Clock

1050 MHz

Memory

2GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

192bit

Memory Bus

256bit

144.2GB/s

Bandwidth

134.4GB/s

Render Config

-

Compute Units

10

-

960

Shading Units

800

80

TMUs

40

24

ROPs

32

-

16 KB (per SMX)

L1 Cache

8 KB (per CU)

384 KB

L2 Cache

512 KB

-

Theoretical Performance

20.64 GPixel/s

Pixel Rate

26.88 GPixel/s

82.56 GTexel/s

Texture Rate

33.60 GTexel/s

-

1.981 TFLOPS

FP32 (float)

1344 GFLOPS

82.56 GFLOPS

FP64 (double)

-

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 1.3a 1x DisplayPort 1.1

1x 6-pin

Power Connectors

-

Graphics Processor

GK106

GPU Name

Barts

GK106-400-A1

GPU Variant

Barts LE (215-0798002)

Kepler

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

2.54 billion

Transistors

1.7 billion

221 mm²

Die Size

255 mm²

Graphics Features

12 (11_0)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

3.0

OpenCL

1.2

1.1

Vulkan

N/A

3.0

CUDA

-

5.1

Shader Model

5.0

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