NVIDIA GeForce GT 640 vs NVIDIA GeForce 8800 Ultra

VS

NVIDIA GeForce GT 640 NVIDIA GeForce 8800 Ultra

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 768MB VRAM GeForce 8800 Ultra to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 's Advantages

Released 5 years and 1 months late

256 additional rendering cores

Lower TDP (65W vs 171W)

NVIDIA GeForce 8800 Ultra 's Advantages

Larger VRAM bandwidth (103.7GB/s vs 28.51GB/s)

Score

Benchmark

FP32 (float)

GeForce GT 640 +79%

0.693 TFLOPS

GeForce 8800 Ultra

0.387 TFLOPS

GeForce GT 640

VS

GeForce 8800 Ultra

Graphics Card

Jun 2012

Release Date

May 2007

GeForce 600

Generation

GeForce 8

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 1.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

891 MHz

Memory Clock

1080 MHz

Memory

2GB

Memory Size

768MB

DDR3

Memory Type

GDDR3

128bit

Memory Bus

384bit

28.51GB/s

Bandwidth

103.7GB/s

Render Config

-

SM Count

16

-

Compute Units

-

384

Shading Units

128

32

TMUs

32

16

ROPs

24

-

Tensor Cores

-

RT Cores

-

16 KB (per SMX)

L1 Cache

-

256 KB

L2 Cache

96 KB

Theoretical Performance

7.216 GPixel/s

Pixel Rate

14.69 GPixel/s

28.86 GTexel/s

Texture Rate

39.17 GTexel/s

-

FP16 (half)

-

692.7 GFLOPS

FP32 (float)

387.1 GFLOPS

28.86 GFLOPS

FP64 (double)

-

Graphics Processor

GK107

GPU Name

G80

GK107-300-A2

GPU Variant

G80-450-A3

Kepler

Architecture

Tesla

TSMC

Foundry

TSMC

28 nm

Process Size

90 nm

1.27 billion

Transistors

0.681 billion

118 mm²

Die Size

484 mm²

Board Design

65W

TDP

171W

250 W

Suggested PSU

450 W

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

Outputs

2x DVI 1x S-Video

None

Power Connectors

2x 6-pin

Graphics Features

12 (11_0)

DirectX

11.1 (10_0)

4.6

OpenGL

3.3

3.0

OpenCL

1.1 (1.0)

1.1

Vulkan

N/A

3.0

CUDA

1.0

5.1

Shader Model

4.0

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