NVIDIA GeForce GT 640 vs ATI Radeon HD 4770

VS

NVIDIA GeForce GT 640 ATI Radeon HD 4770

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 512MB VRAM Radeon HD 4770 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 's Advantages

Released 3 years and 2 months late

Lower TDP (65W vs 80W)

ATI Radeon HD 4770 's Advantages

Larger VRAM bandwidth (51.20GB/s vs 28.51GB/s)

256 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 640

0.693 TFLOPS

Radeon HD 4770 +38%

0.96 TFLOPS

GeForce GT 640

VS

Radeon HD 4770

Graphics Card

Jun 2012

Release Date

Apr 2009

GeForce 600

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

891 MHz

Memory Clock

800 MHz

Memory

2GB

Memory Size

512MB

DDR3

Memory Type

GDDR5

128bit

Memory Bus

128bit

28.51GB/s

Bandwidth

51.20GB/s

Render Config

-

SM Count

-

Compute Units

8

384

Shading Units

640

32

TMUs

32

16

ROPs

16

-

Tensor Cores

-

RT Cores

-

16 KB (per SMX)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

128 KB

Theoretical Performance

7.216 GPixel/s

Pixel Rate

12.00 GPixel/s

28.86 GTexel/s

Texture Rate

24.00 GTexel/s

-

FP16 (half)

-

692.7 GFLOPS

FP32 (float)

960.0 GFLOPS

28.86 GFLOPS

FP64 (double)

192.0 GFLOPS

Graphics Processor

GK107

GPU Name

RV740

GK107-300-A2

GPU Variant

RV740 XT (215-0727019)

Kepler

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

1.27 billion

Transistors

0.826 billion

118 mm²

Die Size

137 mm²

Board Design

65W

TDP

80W

250 W

Suggested PSU

250 W

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

Outputs

2x DVI 1x S-Video

None

Power Connectors

1x 6-pin

Graphics Features

12 (11_0)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

3.0

OpenCL

1.1

Vulkan

N/A

3.0

CUDA

-

5.1

Shader Model

4.1

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