NVIDIA GeForce GTX 780 Ti vs NVIDIA GeForce GT 640 OEM Rebrand

VS

NVIDIA GeForce GTX 780 Ti NVIDIA GeForce GT 640 OEM Rebrand

We compared two Desktop platform GPUs: 3GB VRAM GeForce GTX 780 Ti 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 GTX 780 Ti 's Advantages

Released 1 years and 7 months late

Boost Clock928MHz

More VRAM (3GB vs 1GB)

Larger VRAM bandwidth (336.6GB/s vs 38.40GB/s)

2736 additional rendering cores

NVIDIA GeForce GT 640 OEM Rebrand 's Advantages

Lower TDP (75W vs 250W)

Score

Benchmark

FP32 (float)

GeForce GTX 780 Ti +1187%

5.345 TFLOPS

GeForce GT 640 OEM Rebrand

0.415 TFLOPS

GeForce GTX 780 Ti

VS

GeForce GT 640 OEM Rebrand

Graphics Card

Nov 2013

Release Date

Apr 2012

GeForce 700

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

875 MHz

Base Clock

-

928 MHz

Boost Clock

-

1753 MHz

Memory Clock

800 MHz

Memory

3GB

Memory Size

1536MB

GDDR5

Memory Type

DDR3

384bit

Memory Bus

192bit

336.6GB/s

Bandwidth

38.40GB/s

Render Config

-

SM Count

3

-

Compute Units

-

2880

Shading Units

144

240

TMUs

24

48

ROPs

24

-

Tensor Cores

-

RT Cores

-

16 KB (per SMX)

L1 Cache

64 KB (per SM)

1536 KB

L2 Cache

384 KB

Theoretical Performance

55.68 GPixel/s

Pixel Rate

4.320 GPixel/s

222.7 GTexel/s

Texture Rate

17.28 GTexel/s

-

FP16 (half)

-

5.345 TFLOPS

FP32 (float)

414.7 GFLOPS

222.7 GFLOPS

FP64 (double)

34.56 GFLOPS

Graphics Processor

GK110B

GPU Name

GF116

GK110-425-B1

GPU Variant

GF116-150-A1

Kepler

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

7.08 billion

Transistors

1.17 billion

561 mm²

Die Size

238 mm²

Board Design

250W

TDP

75W

600 W

Suggested PSU

250 W

2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

Outputs

2x DVI 1x mini-HDMI 1.3a

1x 6-pin + 1x 8-pin

Power Connectors

None

Graphics Features

12 (11_1)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

1.1

Vulkan

N/A

3.5

CUDA

2.1

5.1

Shader Model

5.1

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