NVIDIA GeForce GTX 660 OEM vs ATI Radeon HD 4870 Mac Edition

VS

NVIDIA GeForce GTX 660 OEM

ATI Radeon HD 4870 Mac Edition

We compared two Desktop platform GPUs: 1536MB VRAM GeForce GTX 660 OEM and 512MB VRAM Radeon HD 4870 Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 660 OEM 's Advantages

Released 3 years and 7 months late

Boost Clock888MHz

More VRAM (1536GB vs 512GB)

Larger VRAM bandwidth (134.4GB/s vs 108.8GB/s)

352 additional rendering cores

Lower TDP (130W vs 150W)

Score

Benchmark

FP32 (float)

GeForce GTX 660 OEM +70%

2.046 TFLOPS

Radeon HD 4870 Mac Edition

1.2 TFLOPS

GeForce GTX 660 OEM

VS

Radeon HD 4870 Mac Edition

Graphics Card

Aug 2012

Release Date

Jan 2009

GeForce 600

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

823 MHz

Base Clock

-

888 MHz

Boost Clock

-

1400 MHz

Memory Clock

850 MHz

Memory

1536MB

Memory Size

512MB

GDDR5

Memory Type

GDDR5

192bit

Memory Bus

256bit

134.4GB/s

Bandwidth

108.8GB/s

Render Config

-

Compute Units

10

-

1152

Shading Units

800

96

TMUs

40

24

ROPs

16

-

16 KB (per SMX)

L1 Cache

16 KB (per CU)

384 KB

L2 Cache

256 KB

-

Theoretical Performance

21.31 GPixel/s

Pixel Rate

12.00 GPixel/s

85.25 GTexel/s

Texture Rate

30.00 GTexel/s

-

2.046 TFLOPS

FP32 (float)

1200 GFLOPS

85.25 GFLOPS

FP64 (double)

240.0 GFLOPS

Board Design

130W

TDP

150W

300 W

Suggested PSU

450 W

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

Outputs

1x DVI 1x mini-DisplayPort 1.0

1x 6-pin

Power Connectors

2x 6-pin

Graphics Processor

GK104

GPU Name

RV770

GK104-200-KD-A2

GPU Variant

RV770 XT Mac (215-0669080)

Kepler

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

3.54 billion

Transistors

0.956 billion

294 mm²

Die Size

256 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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