NVIDIA GeForce GTX 660 Ti vs ATI Radeon HD 4890

VS

NVIDIA GeForce GTX 660 Ti

ATI Radeon HD 4890

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 Ti and 1024MB VRAM Radeon HD 4890 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 3 years and 4 months late

Boost Clock980MHz

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (144.2GB/s vs 124.8GB/s)

544 additional rendering cores

Lower TDP (150W vs 190W)

Score

Benchmark

FP32 (float)

GeForce GTX 660 Ti +93%

2.634 TFLOPS

Radeon HD 4890

1.36 TFLOPS

GeForce GTX 660 Ti

VS

Radeon HD 4890

Graphics Card

Aug 2012

Release Date

Apr 2009

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

975 MHz

Memory

2GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

192bit

Memory Bus

256bit

144.2GB/s

Bandwidth

124.8GB/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

13.60 GPixel/s

109.8 GTexel/s

Texture Rate

34.00 GTexel/s

-

2.634 TFLOPS

FP32 (float)

1360 GFLOPS

109.8 GFLOPS

FP64 (double)

272.0 GFLOPS

Board Design

150W

TDP

190W

450 W

Suggested PSU

450 W

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

Outputs

2x DVI 1x S-Video

2x 6-pin

Power Connectors

2x 6-pin

Graphics Processor

GK104

GPU Name

RV790

GK104-300-KD-A2

GPU Variant

RV790 XT (215-0758016)

Kepler

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

3.54 billion

Transistors

0.959 billion

294 mm²

Die Size

282 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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