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

VS

ATI Radeon HD 4870 Mac Edition

NVIDIA GeForce GTX 660 OEM

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4870 Mac Edition and 1536MB VRAM GeForce GTX 660 OEM 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)

Radeon HD 4870 Mac Edition

1.2 TFLOPS

GeForce GTX 660 OEM +70%

2.046 TFLOPS

Radeon HD 4870 Mac Edition

VS

GeForce GTX 660 OEM

Graphics Card

Jan 2009

Release Date

Aug 2012

Radeon R700

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

823 MHz

-

Boost Clock

888 MHz

850 MHz

Memory Clock

1400 MHz

Memory

512MB

Memory Size

1536MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

192bit

108.8GB/s

Bandwidth

134.4GB/s

Render Config

10

Compute Units

-

800

Shading Units

1152

40

TMUs

96

16

ROPs

24

-

16 KB (per CU)

L1 Cache

16 KB (per SMX)

256 KB

L2 Cache

384 KB

-

Theoretical Performance

12.00 GPixel/s

Pixel Rate

21.31 GPixel/s

30.00 GTexel/s

Texture Rate

85.25 GTexel/s

-

1200 GFLOPS

FP32 (float)

2.046 TFLOPS

240.0 GFLOPS

FP64 (double)

85.25 GFLOPS

Board Design

150W

TDP

130W

450 W

Suggested PSU

300 W

1x DVI 1x mini-DisplayPort 1.0

Outputs

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

2x 6-pin

Power Connectors

1x 6-pin

Graphics Processor

RV770

GPU Name

GK104

RV770 XT Mac (215-0669080)

GPU Variant

GK104-200-KD-A2

TeraScale

Architecture

Kepler

TSMC

Foundry

TSMC

55 nm

Process Size

28 nm

0.956 billion

Transistors

3.54 billion

256 mm²

Die Size

294 mm²

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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