NVIDIA GeForce GTX 660 Rev. 2 vs ATI Radeon HD 4650

VS

NVIDIA GeForce GTX 660 Rev. 2

ATI Radeon HD 4650

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 Rev. 2 and 256MB VRAM Radeon HD 4650 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 6 years late

Boost Clock1032MHz

More VRAM (2GB vs 256GB)

Larger VRAM bandwidth (144.2GB/s vs 22.40GB/s)

640 additional rendering cores

ATI Radeon HD 4650 's Advantages

Lower TDP (48W vs 140W)

Score

Benchmark

FP32 (float)

GeForce GTX 660 Rev. 2 +415%

1.981 TFLOPS

Radeon HD 4650

0.384 TFLOPS

GeForce GTX 660 Rev. 2

VS

Radeon HD 4650

Graphics Card

Sep 2014

Release Date

Sep 2008

GeForce 600

Generation

Radeon R700

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

700 MHz

Memory

2GB

Memory Size

256MB

GDDR5

Memory Type

GDDR3

192bit

Memory Bus

128bit

144.2GB/s

Bandwidth

22.40GB/s

Render Config

-

Compute Units

4

-

960

Shading Units

320

80

TMUs

32

24

ROPs

8

-

16 KB (per SMX)

L1 Cache

16 KB (per CU)

384 KB

L2 Cache

128 KB

-

Theoretical Performance

20.64 GPixel/s

Pixel Rate

4.800 GPixel/s

82.56 GTexel/s

Texture Rate

19.20 GTexel/s

-

1.981 TFLOPS

FP32 (float)

384.0 GFLOPS

82.56 GFLOPS

FP64 (double)

-

Board Design

140W

TDP

48W

300 W

Suggested PSU

200 W

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

Outputs

2x DVI 1x S-Video

1x 6-pin

Power Connectors

-

Graphics Processor

GK104

GPU Name

RV730

-

GPU Variant

RV730 PRO (215-0719056)

Kepler

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

3.54 billion

Transistors

0.514 billion

294 mm²

Die Size

146 mm²

Graphics Features

12 (11_0)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

3.0

OpenCL

1.1

Vulkan

N/A

3.0

CUDA

-

5.1

Shader Model

4.1

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