NVIDIA GeForce GTX 660 OEM vs AMD Radeon HD 6850

VS

NVIDIA GeForce GTX 660 OEM AMD Radeon HD 6850

We compared two Desktop platform GPUs: 1536MB VRAM GeForce GTX 660 OEM and 1024MB VRAM Radeon HD 6850 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 660 OEM 's Advantages

Released 1 years and 10 months late

Boost Clock888MHz

More VRAM (1536GB vs 1024GB)

Larger VRAM bandwidth (134.4GB/s vs 128.0GB/s)

192 additional rendering cores

AMD Radeon HD 6850 's Advantages

Lower TDP (127W vs 130W)

Score

Benchmark

FP32 (float)

GeForce GTX 660 OEM +37%

2.046 TFLOPS

Radeon HD 6850

1.488 TFLOPS

GeForce GTX 660 OEM

VS

Radeon HD 6850

Graphics Card

Aug 2012

Release Date

Oct 2010

GeForce 600

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

823 MHz

Base Clock

-

888 MHz

Boost Clock

-

1400 MHz

Memory Clock

1000 MHz

Memory

1536MB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

192bit

Memory Bus

256bit

134.4GB/s

Bandwidth

128.0GB/s

Render Config

-

SM Count

-

Compute Units

12

1152

Shading Units

960

96

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

21.31 GPixel/s

Pixel Rate

24.80 GPixel/s

85.25 GTexel/s

Texture Rate

37.20 GTexel/s

-

FP16 (half)

-

2.046 TFLOPS

FP32 (float)

1488 GFLOPS

85.25 GFLOPS

FP64 (double)

-

Graphics Processor

GK104

GPU Name

Barts

GK104-200-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

130W

TDP

127W

300 W

Suggested PSU

300 W

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

Outputs

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

1x 6-pin

Power Connectors

1x 6-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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