AMD Radeon RX 640 Mobile vs AMD Radeon HD 6770M

VS

AMD Radeon RX 640 Mobile

AMD Radeon HD 6770M

We compared two Mobile platform GPUs: 2GB VRAM Radeon RX 640 Mobile and 1024MB VRAM Radeon HD 6770M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 640 Mobile 's Advantages

Released 8 years and 4 months late

Boost Clock1218MHz

More VRAM (2GB vs 1024GB)

160 additional rendering cores

AMD Radeon HD 6770M 's Advantages

Larger VRAM bandwidth (57.60GB/s vs 48.00GB/s)

Lower TDP (35W vs 50W)

Score

Benchmark

FP32 (float)

Radeon RX 640 Mobile +123%

1.559 TFLOPS

Radeon HD 6770M

0.696 TFLOPS

Radeon RX 640 Mobile

VS

Radeon HD 6770M

Graphics Card

May 2019

Release Date

Jan 2011

Mobility Radeon

Generation

Vancouver

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

MXM-A (3.0)

Clock Speeds

1082 MHz

Base Clock

-

1218 MHz

Boost Clock

-

1500 MHz

Memory Clock

900 MHz

Memory

2GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

64bit

Memory Bus

128bit

48.00GB/s

Bandwidth

57.60GB/s

Render Config

10

Compute Units

6

-

640

Shading Units

480

40

TMUs

24

16

ROPs

8

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

19.49 GPixel/s

Pixel Rate

5.800 GPixel/s

48.72 GTexel/s

Texture Rate

17.40 GTexel/s

1.559 TFLOPS

FP16 (half)

-

1.559 TFLOPS

FP32 (float)

696.0 GFLOPS

97.44 GFLOPS

FP64 (double)

-

Board Design

50W

TDP

35W

-

No outputs

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

Polaris 23

GPU Name

Whistler

Polaris 23 XT

GPU Variant

Whistler XT (216-0810001)

GCN 4.0

Architecture

TeraScale 2

GlobalFoundries

Foundry

TSMC

14 nm

Process Size

40 nm

2.2 billion

Transistors

0.716 billion

103 mm²

Die Size

104 mm²

Graphics Features

12 (12_0)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

2.1

OpenCL

1.2

Vulkan

N/A

-

6.4

Shader Model

5.0

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