ATI Radeon HD 3870 AGP vs NVIDIA GeForce GTX 660

VS

ATI Radeon HD 3870 AGP

NVIDIA GeForce GTX 660

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 3870 AGP and 2GB VRAM GeForce GTX 660 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 3870 AGP 's Advantages

Lower TDP (106W vs 140W)

NVIDIA GeForce GTX 660 's Advantages

Boost Clock1032MHz

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (144.2GB/s vs 72.06GB/s)

640 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 3870 AGP

0.497 TFLOPS

GeForce GTX 660 +298%

1.981 TFLOPS

Radeon HD 3870 AGP

VS

GeForce GTX 660

Graphics Card

Unknown

Release Date

Sep 2012

Radeon R600

Generation

GeForce 600

Desktop

Type

Desktop

AGP 8x

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

980 MHz

-

Boost Clock

1032 MHz

1126 MHz

Memory Clock

1502 MHz

Memory

512MB

Memory Size

2GB

GDDR4

Memory Type

GDDR5

256bit

Memory Bus

192bit

72.06GB/s

Bandwidth

144.2GB/s

Render Config

4

Compute Units

-

320

Shading Units

960

16

TMUs

80

16

ROPs

24

-

L1 Cache

16 KB (per SMX)

256 KB

L2 Cache

384 KB

-

Theoretical Performance

12.43 GPixel/s

Pixel Rate

20.64 GPixel/s

12.43 GTexel/s

Texture Rate

82.56 GTexel/s

-

497.3 GFLOPS

FP32 (float)

1.981 TFLOPS

99.46 GFLOPS

FP64 (double)

82.56 GFLOPS

Board Design

106W

TDP

140W

300 W

Suggested PSU

300 W

2x DVI 1x S-Video

Outputs

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

1x 8-pin

Power Connectors

1x 6-pin

Graphics Processor

RV670

GPU Name

GK106

RV670 XT (215-0708005)

GPU Variant

GK106-400-A1

TeraScale

Architecture

Kepler

TSMC

Foundry

TSMC

55 nm

Process Size

28 nm

0.666 billion

Transistors

2.54 billion

192 mm²

Die Size

221 mm²

Graphics Features

10.1 (10_1)

DirectX

12 (11_0)

3.3 (full) 4.0 (partial)

OpenGL

4.6

N/A

OpenCL

3.0

N/A

Vulkan

1.1

-

CUDA

3.0

4.1

Shader Model

5.1

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