NVIDIA GeForce GTX 660 Ti vs AMD Radeon HD 6850 X2

VS

NVIDIA GeForce GTX 660 Ti AMD Radeon HD 6850 X2

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 Ti and 2GB VRAM Radeon HD 6850 X2 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 11 months late

Boost Clock980MHz

Larger VRAM bandwidth (144.2GB/s vs 134.4GB/s)

384 additional rendering cores

Lower TDP (150W vs 254W)

Score

Benchmark

FP32 (float)

GeForce GTX 660 Ti +71%

2.634 TFLOPS

Radeon HD 6850 X2

1.536 TFLOPS

GeForce GTX 660 Ti

VS

Radeon HD 6850 X2

Graphics Card

Aug 2012

Release Date

Sep 2011

GeForce 600

Generation

Northern Islands

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

1050 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

192bit

Memory Bus

256bit

144.2GB/s

Bandwidth

134.4GB/s

Render Config

-

SM Count

-

Compute Units

12

1344

Shading Units

960

112

TMUs

48

24

ROPs

32

-

Tensor Cores

-

RT Cores

-

16 KB (per SMX)

L1 Cache

8 KB (per CU)

384 KB

L2 Cache

512 KB

Theoretical Performance

27.44 GPixel/s

Pixel Rate

25.60 GPixel/s

109.8 GTexel/s

Texture Rate

38.40 GTexel/s

-

FP16 (half)

-

2.634 TFLOPS

FP32 (float)

1.536 TFLOPS

109.8 GFLOPS

FP64 (double)

-

Graphics Processor

GK104

GPU Name

Barts

GK104-300-KD-A2

GPU Variant

Barts PRO (215-0798006)

Kepler

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

3.54 billion

Transistors

1.7 billion

294 mm²

Die Size

255 mm²

Board Design

150W

TDP

254W

450 W

Suggested PSU

600 W

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

Outputs

2x DVI 1x HDMI 1.3a 1x DisplayPort 1.1

2x 6-pin

Power Connectors

2x 8-pin

Graphics Features

12 (11_0)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

3.0

OpenCL

1.2

1.1

Vulkan

N/A

3.0

CUDA

-

5.1

Shader Model

5.0

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