NVIDIA GeForce GTX 660 OEM vs AMD Radeon HD 7850

VS

NVIDIA GeForce GTX 660 OEM

AMD Radeon HD 7850

We compared two Desktop platform GPUs: 1536MB VRAM GeForce GTX 660 OEM and 2GB VRAM Radeon HD 7850 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 660 OEM 's Advantages

Boost Clock888MHz

128 additional rendering cores

AMD Radeon HD 7850 's Advantages

More VRAM (2GB vs 1536GB)

Larger VRAM bandwidth (153.6GB/s vs 134.4GB/s)

Score

Benchmark

FP32 (float)

GeForce GTX 660 OEM +16%

2.046 TFLOPS

Radeon HD 7850

1.761 TFLOPS

GeForce GTX 660 OEM

VS

Radeon HD 7850

Graphics Card

Aug 2012

Release Date

Mar 2012

GeForce 600

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

823 MHz

Base Clock

-

888 MHz

Boost Clock

-

1400 MHz

Memory Clock

1200 MHz

Memory

1536MB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

192bit

Memory Bus

256bit

134.4GB/s

Bandwidth

153.6GB/s

Render Config

-

Compute Units

16

-

1152

Shading Units

1024

96

TMUs

64

24

ROPs

32

-

16 KB (per SMX)

L1 Cache

16 KB (per CU)

384 KB

L2 Cache

512 KB

-

Theoretical Performance

21.31 GPixel/s

Pixel Rate

27.52 GPixel/s

85.25 GTexel/s

Texture Rate

55.04 GTexel/s

-

2.046 TFLOPS

FP32 (float)

1.761 TFLOPS

85.25 GFLOPS

FP64 (double)

110.1 GFLOPS

Board Design

130W

TDP

130W

300 W

Suggested PSU

300 W

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

Outputs

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

1x 6-pin

Power Connectors

1x 6-pin

Graphics Processor

GK104

GPU Name

Pitcairn

GK104-200-KD-A2

GPU Variant

Pitcairn PRO (215-0828062)

Kepler

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

3.54 billion

Transistors

2.8 billion

294 mm²

Die Size

212 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

3.0

OpenCL

1.2

1.1

Vulkan

1.2

3.0

CUDA

-

5.1

Shader Model

5.1

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