NVIDIA GeForce 7800 GTX 512 vs NVIDIA GeForce GT 640 OEM Rebrand

VS

NVIDIA GeForce 7800 GTX 512

NVIDIA GeForce GT 640 OEM Rebrand

We compared two Desktop platform GPUs: 512MB VRAM GeForce 7800 GTX 512 and 1536MB VRAM GeForce GT 640 OEM Rebrand to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce 7800 GTX 512 's Advantages

Larger VRAM bandwidth (51.20GB/s vs 38.40GB/s)

NVIDIA GeForce GT 640 OEM Rebrand 's Advantages

Released 6 years and 5 months late

More VRAM (1536GB vs 512GB)

144 additional rendering cores

Lower TDP (75W vs 108W)

Score

GeForce 7800 GTX 512

VS

GeForce GT 640 OEM Rebrand

Graphics Card

Nov 2005

Release Date

Apr 2012

GeForce 7 PCIe

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 1.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

800 MHz

Memory Clock

800 MHz

Memory

512MB

Memory Size

1536MB

GDDR3

Memory Type

DDR3

256bit

Memory Bus

192bit

51.20GB/s

Bandwidth

38.40GB/s

Render Config

-

SM Count

3

-

Shading Units

144

24

TMUs

24

16

ROPs

24

-

L1 Cache

64 KB (per SM)

-

L2 Cache

384 KB

-

Theoretical Performance

8.000 GPixel/s

Pixel Rate

4.320 GPixel/s

12.00 GTexel/s

Texture Rate

17.28 GTexel/s

-

FP32 (float)

414.7 GFLOPS

-

FP64 (double)

34.56 GFLOPS

Board Design

108W

TDP

75W

300 W

Suggested PSU

250 W

2x DVI 1x S-Video

Outputs

2x DVI 1x mini-HDMI 1.3a

-

Power Connectors

None

Graphics Processor

G70

GPU Name

GF116

GF-7800-GTX-512-A2

GPU Variant

GF116-150-A1

Curie

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

110 nm

Process Size

40 nm

0.302 billion

Transistors

1.17 billion

333 mm²

Die Size

238 mm²

Graphics Features

9.0c (9_3)

DirectX

12 (11_0)

2.1

OpenGL

4.6

N/A

OpenCL

1.1

N/A

Vulkan

N/A

-

CUDA

2.1

3.0

Shader Model

5.1

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