NVIDIA GeForce GT 640 vs NVIDIA GeForce 9800 GTX+

VS

NVIDIA GeForce GT 640

NVIDIA GeForce 9800 GTX+

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 512MB VRAM GeForce 9800 GTX to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 's Advantages

Released 3 years and 5 months late

More VRAM (2GB vs 512GB)

256 additional rendering cores

Lower TDP (65W vs 141W)

NVIDIA GeForce 9800 GTX+ 's Advantages

Larger VRAM bandwidth (70.40GB/s vs 28.51GB/s)

Score

Benchmark

FP32 (float)

GeForce GT 640 +47%

0.693 TFLOPS

GeForce 9800 GTX

0.47 TFLOPS

GeForce GT 640

VS

GeForce 9800 GTX

Graphics Card

Jun 2012

Release Date

Jan 2009

GeForce 600

Generation

GeForce 9

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

891 MHz

Memory Clock

1100 MHz

Memory

2GB

Memory Size

512MB

DDR3

Memory Type

GDDR3

128bit

Memory Bus

256bit

28.51GB/s

Bandwidth

70.40GB/s

Render Config

-

SM Count

16

384

Shading Units

128

32

TMUs

64

16

ROPs

16

-

16 KB (per SMX)

L1 Cache

-

256 KB

L2 Cache

64 KB

-

Theoretical Performance

7.216 GPixel/s

Pixel Rate

11.81 GPixel/s

28.86 GTexel/s

Texture Rate

47.23 GTexel/s

-

692.7 GFLOPS

FP32 (float)

470.0 GFLOPS

28.86 GFLOPS

FP64 (double)

-

Board Design

65W

TDP

141W

250 W

Suggested PSU

300 W

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

Outputs

2x DVI 1x S-Video

None

Power Connectors

2x 6-pin

Graphics Processor

GK107

GPU Name

G92B

GK107-300-A2

GPU Variant

G92-420-B1

Kepler

Architecture

Tesla

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

1.27 billion

Transistors

0.754 billion

118 mm²

Die Size

260 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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