ATI Radeon HD 3850 X3 vs NVIDIA GeForce GTX 660 Rev. 2

VS

ATI Radeon HD 3850 X3

NVIDIA GeForce GTX 660 Rev. 2

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

Main Differences

NVIDIA GeForce GTX 660 Rev. 2 's Advantages

Boost Clock1032MHz

More VRAM (2GB vs 512GB)

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

640 additional rendering cores

Lower TDP (140W vs 145W)

Score

Benchmark

FP32 (float)

Radeon HD 3850 X3

0.428 TFLOPS

GeForce GTX 660 Rev. 2 +362%

1.981 TFLOPS

Radeon HD 3850 X3

VS

GeForce GTX 660 Rev. 2

Graphics Card

Unknown

Release Date

Sep 2014

Radeon R600

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

980 MHz

-

Boost Clock

1032 MHz

850 MHz

Memory Clock

1502 MHz

Memory

512MB

Memory Size

2GB

GDDR3

Memory Type

GDDR5

256bit

Memory Bus

192bit

54.40GB/s

Bandwidth

144.2GB/s

Render Config

4

Compute Units

-

320

Shading Units

960

16

TMUs

80

16

ROPs

24

-

L1 Cache

16 KB (per SMX)

256 KB

L2 Cache

384 KB

-

Theoretical Performance

10.70 GPixel/s

Pixel Rate

20.64 GPixel/s

10.70 GTexel/s

Texture Rate

82.56 GTexel/s

-

428.2 GFLOPS

FP32 (float)

1.981 TFLOPS

-

FP64 (double)

82.56 GFLOPS

Board Design

145W

TDP

140W

300 W

Suggested PSU

300 W

4x DVI

Outputs

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

1x 8-pin

Power Connectors

1x 6-pin

Graphics Processor

RV670

GPU Name

GK104

RV670 PRO (215-0708003)

GPU Variant

-

TeraScale

Architecture

Kepler

TSMC

Foundry

TSMC

55 nm

Process Size

28 nm

0.666 billion

Transistors

3.54 billion

192 mm²

Die Size

294 mm²

Graphics Features

10.1 (10_1)

DirectX

12 (11_0)

3.3 (full) 4.0 (partial)

OpenGL

4.6

N/A

OpenCL

3.0

N/A

Vulkan

1.1

-

CUDA

3.0

4.1

Shader Model

5.1

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