NVIDIA GeForce 840A vs AMD Radeon HD 6990M

VS

NVIDIA GeForce 840A

AMD Radeon HD 6990M

We compared two Mobile platform GPUs: 2GB VRAM GeForce 840A and 2GB VRAM Radeon HD 6990M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce 840A 's Advantages

Released 2 years and 8 months late

Boost Clock1124MHz

Lower TDP (33W vs 100W)

AMD Radeon HD 6990M 's Advantages

Larger VRAM bandwidth (115.2GB/s vs 16.02GB/s)

736 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce 840A

0.863 TFLOPS

Radeon HD 6990M +85%

1.602 TFLOPS

GeForce 840A

VS

Radeon HD 6990M

Graphics Card

Mar 2014

Release Date

Jul 2011

GeForce 800A

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

900 MHz

Memory

2GB

Memory Size

2GB

DDR3

Memory Type

GDDR5

64bit

Memory Bus

256bit

16.02GB/s

Bandwidth

115.2GB/s

Render Config

-

Compute Units

14

-

384

Shading Units

1120

16

TMUs

56

8

ROPs

32

-

64 KB (per SMM)

L1 Cache

8 KB (per CU)

1024 KB

L2 Cache

512 KB

-

Theoretical Performance

8.992 GPixel/s

Pixel Rate

22.88 GPixel/s

17.98 GTexel/s

Texture Rate

40.04 GTexel/s

-

863.2 GFLOPS

FP32 (float)

1.602 TFLOPS

26.98 GFLOPS

FP64 (double)

-

Board Design

33W

TDP

100W

-

No outputs

Outputs

No outputs

-

Power Connectors

None

Graphics Processor

GM108

GPU Name

Blackcomb

-

GPU Variant

Blackcomb XTX (216-0811030)

Maxwell

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

Unknown

Transistors

1.7 billion

Unknown

Die Size

212 mm²

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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