ATI Radeon HD 4870 vs NVIDIA GeForce GTX 660

VS

ATI Radeon HD 4870 NVIDIA GeForce GTX 660

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4870 and 2GB VRAM GeForce GTX 660 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 660 's Advantages

Released 4 years and 3 months late

Boost Clock1032MHz

Larger VRAM bandwidth (144.2GB/s vs 115.2GB/s)

160 additional rendering cores

Lower TDP (140W vs 150W)

Score

Benchmark

FP32 (float)

Radeon HD 4870

1.2 TFLOPS

GeForce GTX 660 +65%

1.981 TFLOPS

Radeon HD 4870

VS

GeForce GTX 660

Graphics Card

Jun 2008

Release Date

Sep 2012

Radeon R700

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

980 MHz

-

Boost Clock

1032 MHz

900 MHz

Memory Clock

1502 MHz

Memory

512MB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

192bit

115.2GB/s

Bandwidth

144.2GB/s

Render Config

-

SM Count

-

10

Compute Units

-

800

Shading Units

960

40

TMUs

80

16

ROPs

24

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per SMX)

256 KB

L2 Cache

384 KB

Theoretical Performance

12.00 GPixel/s

Pixel Rate

20.64 GPixel/s

30.00 GTexel/s

Texture Rate

82.56 GTexel/s

-

FP16 (half)

-

1200 GFLOPS

FP32 (float)

1.981 TFLOPS

240.0 GFLOPS

FP64 (double)

82.56 GFLOPS

Graphics Processor

RV770

GPU Name

GK106

RV770 XT (215-0669049)

GPU Variant

GK106-400-A1

TeraScale

Architecture

Kepler

TSMC

Foundry

TSMC

55 nm

Process Size

28 nm

0.956 billion

Transistors

2.54 billion

256 mm²

Die Size

221 mm²

Board Design

150W

TDP

140W

450 W

Suggested PSU

300 W

2x DVI 1x S-Video

Outputs

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

2x 6-pin

Power Connectors

1x 6-pin

Graphics Features

10.1 (10_1)

DirectX

12 (11_0)

3.3

OpenGL

4.6

1.1

OpenCL

3.0

N/A

Vulkan

1.1

-

CUDA

3.0

4.1

Shader Model

5.1

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