Micro SD card, 마이크로 메모리카드, 속도 수명이 다르다. T1432

Micro SD card, 마이크로 메모리카드, 속도 수명이 다르다.

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4가지 SD Cards;

 

What are the four types of SD cards?

 

SD (Secure Digital), up to 2GB.

 

SDHC (High Capacity), 4GB up to 32GB.

 

SDXC (Extended Capacity), for 4K video, 64GB up to 2TB.

 

SDUC (Ultra Capacity), ideal for 8K video, over 2TB, with a theoretical maximum of 128TB  

 

SDUC 는 인터넽에서 안보이는데,, 안파나요? 
이미지 찾아도 없슴, 

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속도 종류, Speed Class;

 

01. Class 10:

Minimum write speed of 10MB/sec, suitable for Full HD video recording.

 

02. UHS Speed Class 1 (U1):

Minimum write speed of 10MB/sec, suitable for Full HD and some 2K video recording.

 

03. UHS Speed Class 3 (U3):

Minimum write speed of 30MB/sec, ideal for 4K video recording.

 

04. Video Speed Class V30, V60, V90:

Minimum write speeds of 30MB/sec, 60MB/sec, and 90MB/sec respectively, recommended for 4K and 8K video recording.

 

사진;

SDXC 128GB  속도 V30 V60 V90  U3

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사진 ;

SDXC 128GB V60  U3

 

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05. Can SD card SDXC record 8k dash camera videos?

 

Yes, a compatible SDXC card can record 8K video, but it must have a V90 Video Speed Class rating and a high capacity to handle the high data rates and large file sizes.

standard SDXC card will likely NOT work, as it may lack the necessary write speed to record smoothly without dropped frames, and 8K files are much larger and fill up storage quickly. 

 

06. Key requirements for 8K recording; 

 

V90 Speed Class:

Look for cards with a "V90" rating, which guarantees a minimum write speed of (90) MB/sec, essential for high-bitrate 8K video capture. A V60 card is the absolute minimum for 4K, but V90 is recommended for 8K.

 

High Capacity:

8K video files are extremely large. A higher capacity card (e.g., $128$GB, $256$GB, or more) will allow for longer recording times before needing to swap cards.

 

Endurance:

Dashcams are designed for continuous recording, so it is crucial to use high-endurance cards that are built to withstand the constant read/write cycles of loop recording and extreme temperatures.

 

Format:

Ensure the card is formatted to exFAT, which is the standard for SDXC cards, to avoid file size limitations.

 

Compatibility:

Make sure the dash cam itself supports 8K recording and is designed to work with SDXC cards of that speed and capacity.

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07. Can SD card SDHC record 8k dash camera videos?

 

No, standard SDHC card canNOT reliably record 8K video due to its limited write speeds;

you need a card with a Video Speed Class (V60 or V90) or at least a UHS Speed Class 3 (U3) rating to handle the high data rate of 8K footage. While SDHC cards are older and have lower capacity, the more modern and faster SDXC standard is typically required for high-resolution video formats like 8K.

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08. SD card u1 and u3 difference;

 

Main difference is write speed:

U1 cards have a minimum write speed of 10MB/s, while

U3 cards have a minimum write speed of 30MB/s.

 

U3 cards faster and better for 4K video recording and high-speed burst photography,

U1 cards are for HD video, everyday photos, and general use.

 

U1 (UHS Speed Class 1)

U3 (UHS Speed Class 3)

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09. How long will a 128GB SD card record 4K video?

8-10 hours,

If you are using a dash cam that can record in 4K resolution, this storage time reduces to

8-10 hours. Dec 13, 2024

 

AI Overview,

128GB SD card can record approximately 3 to 8 hours of 4K video, with the exact time depending on factors like frame rate and bitrate. For example,

at a lower bitrate like 35 Mbps, it can last up to 8 hours and 19 minutes, while

at a higher bitrate like 400 Mbps, it will only last about 44 minutes.

 

Examples for different bitrates

 

Low bitrate (e.g. 35 Mbps): Up to 8 hours and 19 minutes,

Medium bitrate (e.g. 100 Mbps): Approximately 2 hours and 55 minutes,

High bitrate (e.g. 400 Mbps): Around 44 minutes,

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10. SD card lifespan, 수명

 

What is Lifespan of SD card for 4k video

 

standard cards may last only 6-12 months with heavy use, while

high-endurance cards can last 2-5 years or more.

 

An SD card's lifespan depends on its usage, with most modern cards lasting 10 years or more under normal, read-heavy use.

 

However, cards that are frequently written to, such as

in dash cams, may only last 1 to 2 years.

The limited lifespan is due to the finite number of write/erase cycles per memory cell.

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11. Usage type:

 

For devices like dash cams that constantly record and overwrite data,

the card's lifespan is measured in hours of use (e.g., 5,000 to 20,000 hours).

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12. SDXC SDUC differences

 

https://gouforit.com/wordpress/wp-content/uploads/2024/02/simbolos-sd-tarjetas-video.jpg

 

13. SD SDHC SDXC SDUC,

https://7esl.com/wp-content/uploads/2019/10/SDHC-vs-SDXC.jpg

 

14. SDXC SDUC differences,

https://gouforit.com/wordpress/wp-content/uploads/2024/02/tarjetas-memoria-dispositivos-logos.jpg

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