Welcome to Michael’s Blog!

Welcome to Michael's blog. Michael Andrew, (aka Michael The Maven) is a freelance producer, photography instructor, tech innovator, and when needed, disaster aid specialist. Disclaimer: Michael is a participant in Bhphoto & Amazon affiliate programs that provides an advertising commission if you purchase through links on this website.


Viewing one post  |  view all recent posts

08.14.11         photography  

Memory Card Speed Conversion Rates


Great question I got the other day.

What is the difference between Memory Card Speeds represented by "X" Speed, vs Memory Card represented by "MB" Speed?

I will try to keep this simple:

"X" Speed is the equivalent of the maximum CD audio data transfer rate.
A Memory card that is 100x for example, has a transfer rate roughly 100 times faster than CD audio transfer.

This CD Data transfer speed is roughly 150 kbytes/s, so the conversion equation in terms of Data Rate is=

Rate = (Speed in "x") x 150 kbytes
In the case of this Delkin card;

633x x 150 kbytes = 94,900 kbytes (divide this by 1000 to get MBs) = ~ 95 MB/s (which is a pretty dang quick card for a camera)

A card with a 133x rating is about 20 MB/s

---

- Memory Card Speeds become more and more important when recording or capturing large file sizes. If you are shooting small jpegs, its not going to matter as much as shooting HD video on your 5Dii. If you are capturing HD Footage, UDMA are the ones being recommended now, with a speed of at least 45 MB/s or higher.

That said, I know of many photographers who claim to shoot video on 133x without many issues.

My stance on it is this: Get the biggest capacity and fastest speed you can if you are shooting video.
If you shoot RAW images, 133x will be fine.

I will also say that if you look around, you can often find some great deals on fast cards from different manufacturers.

Here are some AWESOME performing cards for recording video on Bhphoto.com:

(Yes, they are expensive)

Extreme 32 GB- 90Mbs
Extreme 64 GB- 90Mb/s
Extreme 128 GB- 100MB/s

Bundle Deal

3 Individual 32 GB- 600x

blog stats
posts: 4,704
comments: 12,195
visits:
archive by month
2019:   january  february  march  april  may
2018:   january  february  march  april  may  june  july  august  september  october  november  december
2017:   january  february  march  april  may  june  july  august  september  october  november  december
2016:   january  february  march  april  may  june  july  august  september  october  november  december
2015:   january  february  march  april  may  june  july  august  september  october  november  december
2014:   january  february  march  april  may  june  july  august  september  october  november  december
2013:   january  february  march  april  may  june  july  august  september  october  november  december
2012:   january  february  march  april  may  june  july  august  september  october  november  december
2011:   january  february  march  april  may  june  july  august  september  october  november  december
2010:   january  february  march  april  may  june  july  august  september  october  november  december
2009:   january  february  march  april  may  june  july  august  september  october  november  december
2008:   january  february  march  april  may  june  july  august  september  october  november  december
2007:   january  july  august  september  october  november  december
Canon Speedlite Crash Course DVDDigital Photography Crash Course DVDPaintballer ProNikon D7100 Crash Course Training Tutorial VideoCanon 600EX-RT Speedlite Crash CoursePhotography Lighting Crash CourseBH PhotoCanon 6D Crash Course Tutorial Training VideoBusiness Crash Course For PhotographersAdvanced Photography Techniques Lessons DVDNikon D5300 Crash Course DownloadMaven Adapter - Sky Cam ConnectorMichael Andrew Lollipops | Photoshop Action SetMichael Andrew Maui Desktop WallpaperPhotoshop Crash Course DVD Beginner LessonsCanon 5Diii Crash Course Training VideoMA- Maui Screen Savers 2009