NVIDIA GeForce GT 640 Rev. 2 vs NVIDIA GeForce 9800 GX2

VS

NVIDIA GeForce GT 640 Rev. 2 NVIDIA GeForce 9800 GX2

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GT 640 Rev. 2 and 512MB VRAM GeForce 9800 GX2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 Rev. 2 's Advantages

Released 5 years and 2 months late

More VRAM (1024GB vs 512GB)

256 additional rendering cores

Lower TDP (49W vs 197W)

NVIDIA GeForce 9800 GX2 's Advantages

Larger VRAM bandwidth (64.00GB/s vs 40.06GB/s)

Score

Benchmark

FP32 (float)

GeForce GT 640 Rev. 2 +109%

0.803 TFLOPS

GeForce 9800 GX2

0.384 TFLOPS

GeForce GT 640 Rev. 2

VS

GeForce 9800 GX2

Graphics Card

May 2013

Release Date

Mar 2008

GeForce 600

Generation

GeForce 9

Desktop

Type

Desktop

PCIe 2.0 x8

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1252 MHz

Memory Clock

1000 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

64bit

Memory Bus

256bit

40.06GB/s

Bandwidth

64.00GB/s

Render Config

-

SM Count

16

-

Compute Units

-

384

Shading Units

128

32

TMUs

64

8

ROPs

16

-

Tensor Cores

-

RT Cores

-

16 KB (per SMX)

L1 Cache

-

512 KB

L2 Cache

64 KB

Theoretical Performance

8.368 GPixel/s

Pixel Rate

9.600 GPixel/s

33.47 GTexel/s

Texture Rate

38.40 GTexel/s

-

FP16 (half)

-

803.3 GFLOPS

FP32 (float)

384.0 GFLOPS

33.47 GFLOPS

FP64 (double)

-

Graphics Processor

GK208

GPU Name

G92

GK208-400-A1

GPU Variant

G92-450-A2

Kepler 2.0

Architecture

Tesla

TSMC

Foundry

TSMC

28 nm

Process Size

65 nm

1.02 billion

Transistors

0.754 billion

87 mm²

Die Size

324 mm²

Board Design

49W

TDP

197W

200 W

Suggested PSU

450 W

1x DVI 1x HDMI 1.4a 1x VGA

Outputs

2x DVI 1x HDMI

None

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Features

12 (11_0)

DirectX

11.1 (10_0)

4.6

OpenGL

3.3

3.0

OpenCL

1.1

Vulkan

N/A

3.5

CUDA

1.1

5.1

Shader Model

4.0

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