AMD Radeon RX 640 Mobile vs AMD Radeon HD 6990M

VS

AMD Radeon RX 640 Mobile

AMD Radeon HD 6990M

We compared two Mobile platform GPUs: 2GB VRAM Radeon RX 640 Mobile and 2GB VRAM Radeon HD 6990M 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 7 years and 10 months late

Boost Clock1218MHz

Lower TDP (50W vs 100W)

AMD Radeon HD 6990M 's Advantages

Larger VRAM bandwidth (115.2GB/s vs 48.00GB/s)

480 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon RX 640 Mobile

1.559 TFLOPS

Radeon HD 6990M +2%

1.602 TFLOPS

Radeon RX 640 Mobile

VS

Radeon HD 6990M

Graphics Card

May 2019

Release Date

Jul 2011

Mobility Radeon

Generation

Vancouver

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

MXM-B (3.0)

Clock Speeds

1082 MHz

Base Clock

-

1218 MHz

Boost Clock

-

1500 MHz

Memory Clock

900 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

64bit

Memory Bus

256bit

48.00GB/s

Bandwidth

115.2GB/s

Render Config

10

Compute Units

14

-

640

Shading Units

1120

40

TMUs

56

16

ROPs

32

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

512 KB

L2 Cache

512 KB

-

Theoretical Performance

19.49 GPixel/s

Pixel Rate

22.88 GPixel/s

48.72 GTexel/s

Texture Rate

40.04 GTexel/s

1.559 TFLOPS

FP16 (half)

-

1.559 TFLOPS

FP32 (float)

1.602 TFLOPS

97.44 GFLOPS

FP64 (double)

-

Board Design

50W

TDP

100W

-

No outputs

Outputs

No outputs

None

Power Connectors

None

Graphics Processor

Polaris 23

GPU Name

Blackcomb

Polaris 23 XT

GPU Variant

Blackcomb XTX (216-0811030)

GCN 4.0

Architecture

TeraScale 2

GlobalFoundries

Foundry

TSMC

14 nm

Process Size

40 nm

2.2 billion

Transistors

1.7 billion

103 mm²

Die Size

212 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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