NVIDIA GeForce GTX 660 vs NVIDIA GeForce 8400 GS PCI

VS

NVIDIA GeForce GTX 660

NVIDIA GeForce 8400 GS PCI

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 and 512MB VRAM GeForce 8400 GS PCI to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 660 's Advantages

Released 4 years and 9 months late

Boost Clock1032MHz

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (144.2GB/s vs 5.328GB/s)

952 additional rendering cores

NVIDIA GeForce 8400 GS PCI 's Advantages

Lower TDP (25W vs 140W)

Score

Benchmark

FP32 (float)

GeForce GTX 660 +8904%

1.981 TFLOPS

GeForce 8400 GS PCI

0.022 TFLOPS

GeForce GTX 660

VS

GeForce 8400 GS PCI

Graphics Card

Sep 2012

Release Date

Dec 2007

GeForce 600

Generation

GeForce 8

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCI

Clock Speeds

980 MHz

Base Clock

-

1032 MHz

Boost Clock

-

1502 MHz

Memory Clock

333 MHz

Memory

2GB

Memory Size

512MB

GDDR5

Memory Type

DDR2

192bit

Memory Bus

64bit

144.2GB/s

Bandwidth

5.328GB/s

Render Config

-

SM Count

1

960

Shading Units

8

80

TMUs

4

24

ROPs

4

-

16 KB (per SMX)

L1 Cache

-

384 KB

L2 Cache

16 KB

-

Theoretical Performance

20.64 GPixel/s

Pixel Rate

2.268 GPixel/s

82.56 GTexel/s

Texture Rate

2.268 GTexel/s

-

1.981 TFLOPS

FP32 (float)

22.40 GFLOPS

82.56 GFLOPS

FP64 (double)

-

Board Design

140W

TDP

25W

300 W

Suggested PSU

200 W

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

Outputs

1x S-Video 1x DMS-59

1x 6-pin

Power Connectors

None

Graphics Processor

GK106

GPU Name

G98

GK106-400-A1

GPU Variant

G98-400-U2

Kepler

Architecture

Tesla

TSMC

Foundry

TSMC

28 nm

Process Size

65 nm

2.54 billion

Transistors

0.21 billion

221 mm²

Die Size

86 mm²

Graphics Features

12 (11_0)

DirectX

11.1 (10_0)

4.6

OpenGL

3.3

3.0

OpenCL

1.1

Vulkan

N/A

3.0

CUDA

1.1

5.1

Shader Model

4.0

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