NVIDIA GeForce GT 640M LE vs AMD Radeon HD 6990M Rebrand

VS

NVIDIA GeForce GT 640M LE AMD Radeon HD 6990M Rebrand

We compared two Mobile platform GPUs: 2GB VRAM GeForce GT 640M LE and 1024MB VRAM Radeon HD 6990M Rebrand to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640M LE 's Advantages

Released 10 months late

More VRAM (2GB vs 1GB)

Lower TDP (32W vs 100W)

AMD Radeon HD 6990M Rebrand 's Advantages

Larger VRAM bandwidth (70.40GB/s vs 50.24GB/s)

704 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 640M LE

0.289 TFLOPS

Radeon HD 6990M Rebrand +342%

1.28 TFLOPS

GeForce GT 640M LE

VS

Radeon HD 6990M Rebrand

Graphics Card

May 2012

Release Date

Jul 2011

GeForce 600M

Generation

Vancouver

Mobile

Type

Mobile

PCIe 2.0 x16

Bus Interface

MXM-B (3.0)

Clock Speeds

-

Base Clock

-

Boost Clock

-

785 MHz

Memory Clock

1100 MHz

Memory

2GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

128bit

50.24GB/s

Bandwidth

70.40GB/s

Render Config

2

SM Count

-

Compute Units

14

96

Shading Units

800

16

TMUs

40

4

ROPs

16

-

Tensor Cores

-

RT Cores

-

64 KB (per SM)

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

256 KB

Theoretical Performance

3.012 GPixel/s

Pixel Rate

12.80 GPixel/s

12.05 GTexel/s

Texture Rate

32.00 GTexel/s

-

FP16 (half)

-

289.0 GFLOPS

FP32 (float)

1280 GFLOPS

24.08 GFLOPS

FP64 (double)

-

Graphics Processor

GF108

GPU Name

Broadway

-

GPU Variant

Broadway XTX

Fermi

Architecture

TeraScale 2

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

0.585 billion

Transistors

1.04 billion

116 mm²

Die Size

166 mm²

Board Design

32W

TDP

100W

-

Suggested PSU

-

No outputs

Outputs

No outputs

-

Power Connectors

-

Graphics Features

12 (11_0)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

1.1

OpenCL

1.2

N/A

Vulkan

N/A

2.1

CUDA

-

5.1

Shader Model

5.0

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