NVIDIA GeForce GT 640 OEM Rebrand vs NVIDIA GeForce 9800 GTX+

VS

NVIDIA GeForce GT 640 OEM Rebrand

NVIDIA GeForce 9800 GTX+

We compared two Desktop platform GPUs: 1536MB VRAM GeForce GT 640 OEM Rebrand 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 OEM Rebrand 's Advantages

Released 3 years and 3 months late

More VRAM (1536GB vs 512GB)

16 additional rendering cores

Lower TDP (75W vs 141W)

NVIDIA GeForce 9800 GTX+ 's Advantages

Larger VRAM bandwidth (70.40GB/s vs 38.40GB/s)

Score

Benchmark

FP32 (float)

GeForce GT 640 OEM Rebrand

0.415 TFLOPS

GeForce 9800 GTX +13%

0.47 TFLOPS

GeForce GT 640 OEM Rebrand

VS

GeForce 9800 GTX

Graphics Card

Apr 2012

Release Date

Jan 2009

GeForce 600

Generation

GeForce 9

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

800 MHz

Memory Clock

1100 MHz

Memory

1536MB

Memory Size

512MB

DDR3

Memory Type

GDDR3

192bit

Memory Bus

256bit

38.40GB/s

Bandwidth

70.40GB/s

Render Config

-

3

SM Count

16

144

Shading Units

128

24

TMUs

64

24

ROPs

16

-

64 KB (per SM)

L1 Cache

-

384 KB

L2 Cache

64 KB

-

Theoretical Performance

4.320 GPixel/s

Pixel Rate

11.81 GPixel/s

17.28 GTexel/s

Texture Rate

47.23 GTexel/s

-

414.7 GFLOPS

FP32 (float)

470.0 GFLOPS

34.56 GFLOPS

FP64 (double)

-

Board Design

75W

TDP

141W

250 W

Suggested PSU

300 W

2x DVI 1x mini-HDMI 1.3a

Outputs

2x DVI 1x S-Video

None

Power Connectors

2x 6-pin

Graphics Processor

GF116

GPU Name

G92B

GF116-150-A1

GPU Variant

G92-420-B1

Fermi 2.0

Architecture

Tesla

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

1.17 billion

Transistors

0.754 billion

238 mm²

Die Size

260 mm²

Graphics Features

12 (11_0)

DirectX

11.1 (10_0)

4.6

OpenGL

3.3

1.1

OpenCL

1.1

N/A

Vulkan

N/A

2.1

CUDA

1.1

5.1

Shader Model

4.0

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