AMD Radeon HD 6770M Mac Edition vs NVIDIA GeForce 820A

VS

AMD Radeon HD 6770M Mac Edition

NVIDIA GeForce 820A

We compared two Mobile platform GPUs: 512MB VRAM Radeon HD 6770M Mac Edition and 1024MB VRAM GeForce 820A to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6770M Mac Edition 's Advantages

Larger VRAM bandwidth (57.60GB/s vs 14.40GB/s)

384 additional rendering cores

NVIDIA GeForce 820A 's Advantages

Released 3 years and 2 months late

More VRAM (1024GB vs 512GB)

Lower TDP (15W vs 35W)

Score

Benchmark

FP32 (float)

Radeon HD 6770M Mac Edition +133%

0.696 TFLOPS

GeForce 820A

0.298 TFLOPS

Radeon HD 6770M Mac Edition

VS

GeForce 820A

Graphics Card

Jan 2011

Release Date

Mar 2014

Vancouver

Generation

GeForce 800A

Mobile

Type

Mobile

MXM-A (3.0)

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

900 MHz

Memory Clock

900 MHz

Memory

512MB

Memory Size

1024MB

GDDR5

Memory Type

DDR3

128bit

Memory Bus

64bit

57.60GB/s

Bandwidth

14.40GB/s

Render Config

6

Compute Units

-

SM Count

2

480

Shading Units

96

24

TMUs

16

8

ROPs

8

-

8 KB (per CU)

L1 Cache

64 KB (per SM)

256 KB

L2 Cache

128 KB

-

Theoretical Performance

5.800 GPixel/s

Pixel Rate

3.100 GPixel/s

17.40 GTexel/s

Texture Rate

12.40 GTexel/s

-

696.0 GFLOPS

FP32 (float)

297.6 GFLOPS

-

FP64 (double)

24.80 GFLOPS

Board Design

35W

TDP

15W

-

No outputs

Outputs

No outputs

-

Graphics Processor

Whistler

GPU Name

GF117

Whistler XT (216-0810001)

GPU Variant

N15V-GM

TeraScale 2

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

0.716 billion

Transistors

0.585 billion

104 mm²

Die Size

116 mm²

Graphics Features

11.2 (11_0)

DirectX

12 (11_0)

4.4

OpenGL

4.6

1.2

OpenCL

1.1

N/A

Vulkan

N/A

-

CUDA

2.1

5.0

Shader Model

5.1

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