NVIDIA GeForce GTX 660 Ti vs ATI Radeon HD 3850 X3

VS

NVIDIA GeForce GTX 660 Ti

ATI Radeon HD 3850 X3

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 Ti and 512MB VRAM Radeon HD 3850 X3 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 660 Ti 's Advantages

Boost Clock980MHz

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (144.2GB/s vs 54.40GB/s)

1024 additional rendering cores

ATI Radeon HD 3850 X3 's Advantages

Lower TDP (145W vs 150W)

Score

Benchmark

FP32 (float)

GeForce GTX 660 Ti +515%

2.634 TFLOPS

Radeon HD 3850 X3

0.428 TFLOPS

GeForce GTX 660 Ti

VS

Radeon HD 3850 X3

Graphics Card

Aug 2012

Release Date

Unknown

GeForce 600

Generation

Radeon R600

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

850 MHz

Memory

2GB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

192bit

Memory Bus

256bit

144.2GB/s

Bandwidth

54.40GB/s

Render Config

-

Compute Units

4

-

1344

Shading Units

320

112

TMUs

16

24

ROPs

16

-

16 KB (per SMX)

L1 Cache

-

384 KB

L2 Cache

256 KB

-

Theoretical Performance

27.44 GPixel/s

Pixel Rate

10.70 GPixel/s

109.8 GTexel/s

Texture Rate

10.70 GTexel/s

-

2.634 TFLOPS

FP32 (float)

428.2 GFLOPS

109.8 GFLOPS

FP64 (double)

-

Board Design

150W

TDP

145W

450 W

Suggested PSU

300 W

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

Outputs

4x DVI

2x 6-pin

Power Connectors

1x 8-pin

Graphics Processor

GK104

GPU Name

RV670

GK104-300-KD-A2

GPU Variant

RV670 PRO (215-0708003)

Kepler

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

3.54 billion

Transistors

0.666 billion

294 mm²

Die Size

192 mm²

Graphics Features

12 (11_0)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3 (full) 4.0 (partial)

3.0

OpenCL

N/A

1.1

Vulkan

N/A

3.0

CUDA

-

5.1

Shader Model

4.1

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