NVIDIA GeForce GT 640 Rev. 2 vs AMD Radeon HD 7790

VS

NVIDIA GeForce GT 640 Rev. 2 AMD Radeon HD 7790

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GT 640 Rev. 2 and 1024MB VRAM Radeon HD 7790 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

Lower TDP (49W vs 85W)

AMD Radeon HD 7790 's Advantages

Larger VRAM bandwidth (96.00GB/s vs 40.06GB/s)

512 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 640 Rev. 2

0.803 TFLOPS

Radeon HD 7790 +123%

1.792 TFLOPS

GeForce GT 640 Rev. 2

VS

Radeon HD 7790

Graphics Card

May 2013

Release Date

Mar 2013

GeForce 600

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 2.0 x8

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1252 MHz

Memory Clock

1500 MHz

Memory

1024MB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

64bit

Memory Bus

128bit

40.06GB/s

Bandwidth

96.00GB/s

Render Config

-

SM Count

-

Compute Units

14

384

Shading Units

896

32

TMUs

56

8

ROPs

16

-

Tensor Cores

-

RT Cores

-

16 KB (per SMX)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

256 KB

Theoretical Performance

8.368 GPixel/s

Pixel Rate

16.00 GPixel/s

33.47 GTexel/s

Texture Rate

56.00 GTexel/s

-

FP16 (half)

-

803.3 GFLOPS

FP32 (float)

1.792 TFLOPS

33.47 GFLOPS

FP64 (double)

112.0 GFLOPS

Graphics Processor

GK208

GPU Name

Bonaire

GK208-400-A1

GPU Variant

Bonaire XT (215-0839039)

Kepler 2.0

Architecture

GCN 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

1.02 billion

Transistors

2.08 billion

87 mm²

Die Size

160 mm²

Board Design

49W

TDP

85W

200 W

Suggested PSU

250 W

1x DVI 1x HDMI 1.4a 1x VGA

Outputs

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

None

Power Connectors

1x 6-pin

Graphics Features

12 (11_0)

DirectX

12 (12_0)

4.6

OpenGL

4.6

3.0

OpenCL

2.0

1.1

Vulkan

1.2

3.5

CUDA

-

5.1

Shader Model

6.3

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