NVIDIA GeForce GT 640 vs AMD Radeon HD 8490 OEM

VS

NVIDIA GeForce GT 640

AMD Radeon HD 8490 OEM

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 1024MB VRAM Radeon HD 8490 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 's Advantages

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (28.51GB/s vs 14.40GB/s)

224 additional rendering cores

AMD Radeon HD 8490 OEM 's Advantages

Released 1 years and 1 months late

Lower TDP (35W vs 65W)

Score

Benchmark

FP32 (float)

GeForce GT 640 +147%

0.693 TFLOPS

Radeon HD 8490 OEM

0.28 TFLOPS

GeForce GT 640

VS

Radeon HD 8490 OEM

Graphics Card

Jun 2012

Release Date

Jul 2013

GeForce 600

Generation

Sea Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

891 MHz

Memory Clock

900 MHz

Memory

2GB

Memory Size

1024MB

DDR3

Memory Type

DDR3

128bit

Memory Bus

64bit

28.51GB/s

Bandwidth

14.40GB/s

Render Config

-

Compute Units

2

-

384

Shading Units

160

32

TMUs

8

16

ROPs

4

-

16 KB (per SMX)

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

128 KB

-

Theoretical Performance

7.216 GPixel/s

Pixel Rate

3.500 GPixel/s

28.86 GTexel/s

Texture Rate

7.000 GTexel/s

-

692.7 GFLOPS

FP32 (float)

280.0 GFLOPS

28.86 GFLOPS

FP64 (double)

-

Board Design

65W

TDP

35W

250 W

Suggested PSU

200 W

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

Outputs

1x DVI 1x DisplayPort 1.1

None

Power Connectors

None

Graphics Processor

GK107

GPU Name

Caicos

GK107-300-A2

GPU Variant

Caicos XTX

Kepler

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

1.27 billion

Transistors

0.37 billion

118 mm²

Die Size

67 mm²

Graphics Features

12 (11_0)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

3.0

OpenCL

1.2

1.1

Vulkan

N/A

3.0

CUDA

-

5.1

Shader Model

5.0

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