NVIDIA GeForce GTX 660 Ti vs ATI Radeon HD 4850

VS

NVIDIA GeForce GTX 660 Ti

ATI Radeon HD 4850

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 Ti and 512MB VRAM Radeon HD 4850 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 660 Ti 's Advantages

Released 4 years and 2 months late

Boost Clock980MHz

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (144.2GB/s vs 63.55GB/s)

544 additional rendering cores

ATI Radeon HD 4850 's Advantages

Lower TDP (110W vs 150W)

Score

Benchmark

FP32 (float)

GeForce GTX 660 Ti +163%

2.634 TFLOPS

Radeon HD 4850

1 TFLOPS

GeForce GTX 660 Ti

VS

Radeon HD 4850

Graphics Card

Aug 2012

Release Date

Jun 2008

GeForce 600

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

915 MHz

Base Clock

-

980 MHz

Boost Clock

-

1502 MHz

Memory Clock

993 MHz

Memory

2GB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

192bit

Memory Bus

256bit

144.2GB/s

Bandwidth

63.55GB/s

Render Config

-

Compute Units

10

-

1344

Shading Units

800

112

TMUs

40

24

ROPs

16

-

16 KB (per SMX)

L1 Cache

16 KB (per CU)

384 KB

L2 Cache

256 KB

-

Theoretical Performance

27.44 GPixel/s

Pixel Rate

10.00 GPixel/s

109.8 GTexel/s

Texture Rate

25.00 GTexel/s

-

2.634 TFLOPS

FP32 (float)

1000 GFLOPS

109.8 GFLOPS

FP64 (double)

200.0 GFLOPS

Board Design

150W

TDP

110W

450 W

Suggested PSU

300 W

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

Outputs

2x DVI 1x S-Video

2x 6-pin

Power Connectors

1x 6-pin

Graphics Processor

GK104

GPU Name

RV770

GK104-300-KD-A2

GPU Variant

RV770 PRO (215-0669065)

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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