NVIDIA GeForce 840A vs AMD Radeon HD 6770M Mac Edition

VS

NVIDIA GeForce 840A

AMD Radeon HD 6770M Mac Edition

We compared two Mobile platform GPUs: 2GB VRAM GeForce 840A and 512MB VRAM Radeon HD 6770M Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce 840A 's Advantages

Released 3 years and 2 months late

Boost Clock1124MHz

More VRAM (2GB vs 512GB)

Lower TDP (33W vs 35W)

AMD Radeon HD 6770M Mac Edition 's Advantages

Larger VRAM bandwidth (57.60GB/s vs 16.02GB/s)

96 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce 840A +23%

0.863 TFLOPS

Radeon HD 6770M Mac Edition

0.696 TFLOPS

GeForce 840A

VS

Radeon HD 6770M Mac Edition

Graphics Card

Mar 2014

Release Date

Jan 2011

GeForce 800A

Generation

Vancouver

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

MXM-A (3.0)

Clock Speeds

1029 MHz

Base Clock

-

1124 MHz

Boost Clock

-

1001 MHz

Memory Clock

900 MHz

Memory

2GB

Memory Size

512MB

DDR3

Memory Type

GDDR5

64bit

Memory Bus

128bit

16.02GB/s

Bandwidth

57.60GB/s

Render Config

-

Compute Units

6

-

384

Shading Units

480

16

TMUs

24

8

ROPs

8

-

64 KB (per SMM)

L1 Cache

8 KB (per CU)

1024 KB

L2 Cache

256 KB

-

Theoretical Performance

8.992 GPixel/s

Pixel Rate

5.800 GPixel/s

17.98 GTexel/s

Texture Rate

17.40 GTexel/s

-

863.2 GFLOPS

FP32 (float)

696.0 GFLOPS

26.98 GFLOPS

FP64 (double)

-

Board Design

33W

TDP

35W

-

No outputs

Outputs

No outputs

-

Graphics Processor

GM108

GPU Name

Whistler

-

GPU Variant

Whistler XT (216-0810001)

Maxwell

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

Unknown

Transistors

0.716 billion

Unknown

Die Size

104 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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