NVIDIA GeForce 840M vs AMD Radeon HD 6990M Rebrand

VS

NVIDIA GeForce 840M AMD Radeon HD 6990M Rebrand

We compared two Mobile platform GPUs: 2GB VRAM GeForce 840M 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 840M 's Advantages

Released 2 years and 8 months late

Boost Clock1124MHz

More VRAM (2GB vs 1GB)

Lower TDP (33W vs 100W)

AMD Radeon HD 6990M Rebrand 's Advantages

Larger VRAM bandwidth (70.40GB/s vs 16.02GB/s)

416 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce 840M

0.863 TFLOPS

Radeon HD 6990M Rebrand +48%

1.28 TFLOPS

GeForce 840M

VS

Radeon HD 6990M Rebrand

Graphics Card

Mar 2014

Release Date

Jul 2011

GeForce 800M

Generation

Vancouver

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

MXM-B (3.0)

Clock Speeds

1029 MHz

Base Clock

-

1124 MHz

Boost Clock

-

1001 MHz

Memory Clock

1100 MHz

Memory

2GB

Memory Size

1024MB

DDR3

Memory Type

GDDR5

64bit

Memory Bus

128bit

16.02GB/s

Bandwidth

70.40GB/s

Render Config

-

SM Count

-

Compute Units

14

384

Shading Units

800

16

TMUs

40

8

ROPs

16

-

Tensor Cores

-

RT Cores

-

64 KB (per SMM)

L1 Cache

8 KB (per CU)

1024 KB

L2 Cache

256 KB

Theoretical Performance

8.992 GPixel/s

Pixel Rate

12.80 GPixel/s

17.98 GTexel/s

Texture Rate

32.00 GTexel/s

-

FP16 (half)

-

863.2 GFLOPS

FP32 (float)

1280 GFLOPS

26.98 GFLOPS

FP64 (double)

-

Graphics Processor

GM108

GPU Name

Broadway

N15S-GT

GPU Variant

Broadway XTX

Maxwell

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

Unknown

Transistors

1.04 billion

Unknown

Die Size

166 mm²

Board Design

33W

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

3.0

OpenCL

1.2

1.3

Vulkan

N/A

5.0

CUDA

-

5.1

Shader Model

5.0

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