NVIDIA GeForce GTX 660 vs AMD Radeon HD 7850

VS

NVIDIA GeForce GTX 660 AMD Radeon HD 7850

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 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 's Advantages

Released 6 months late

Boost Clock1032MHz

AMD Radeon HD 7850 's Advantages

Larger VRAM bandwidth (153.6GB/s vs 144.2GB/s)

64 additional rendering cores

Lower TDP (130W vs 140W)

Score

Benchmark

FP32 (float)

GeForce GTX 660 +12%

1.981 TFLOPS

Radeon HD 7850

1.761 TFLOPS

3DMark Time Spy

GeForce GTX 660

1308

Radeon HD 7850

1312

GeForce GTX 660

VS

Radeon HD 7850

Graphics Card

Sep 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

980 MHz

Base Clock

-

1032 MHz

Boost Clock

-

1502 MHz

Memory Clock

1200 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

192bit

Memory Bus

256bit

144.2GB/s

Bandwidth

153.6GB/s

Render Config

-

SM Count

-

Compute Units

16

960

Shading Units

1024

80

TMUs

64

24

ROPs

32

-

Tensor Cores

-

RT Cores

-

16 KB (per SMX)

L1 Cache

16 KB (per CU)

384 KB

L2 Cache

512 KB

Theoretical Performance

20.64 GPixel/s

Pixel Rate

27.52 GPixel/s

82.56 GTexel/s

Texture Rate

55.04 GTexel/s

-

FP16 (half)

-

1.981 TFLOPS

FP32 (float)

1.761 TFLOPS

82.56 GFLOPS

FP64 (double)

110.1 GFLOPS

Graphics Processor

GK106

GPU Name

Pitcairn

GK106-400-A1

GPU Variant

Pitcairn PRO (215-0828062)

Kepler

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

2.54 billion

Transistors

2.8 billion

221 mm²

Die Size

212 mm²

Board Design

140W

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 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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