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Understanding SD Card Speeds

While the first SD cards were very similar between brands, each brand now offers cards in several different speeds for each capacity. To make things more confusing, SD card speeds are measured in two different ways: in kilobytes or megabytes per second (KB/s or MB/s) and in an “x” rating similar to that of CD-ROMS. The “x” is the minimum CD-ROM speed of 150KB/s, so here’s a table of equivalent speeds:

  • 4x: 600 KB/s
  • 16x: 2.4 MB/s
  • 40x: 6.0 MB/s
  • 66x: 10MB/s
  • 133x: 20MB/s

Understanding available options

While this varies between manufacturers, most offer two or three categories of speed. At this writing, here’s a summary of what each category means:

  • Basic SD cards (Sandisk, Lexar, etc.) are the cheapest models. They generally have a speed of 1x to 16x, but often don’t guarantee a particular speed, so you won’t find anything about speed listed on the package.
  • “Pro” SD cards (Sandisk Ultra, Lexar High Speed, etc.) list a speed of 32X or higher. Some have speeds up to 66x (10Mbps).
  • High-end SD cards (Sandisk Extreme, Lexar Professional, etc.) have a speed of at least 66x. The latest models (i.e. Sandisk Extreme III) have a speed of 133x.

Since these categories are vague, and not always meaningful—for example, Sandisk’s “Ultra II” and “Extreme” cards are the same speed, but “Extreme III” is a higher speed—you should always compare based on the actual speed listed on the package. If it isn’t listed, assume you’re looking at one of the slowest cards.

Which one do you need?

Which speed you need depends on your camera. While even the fastest cameras can make do with a slow SD card, they’ll be at their best with a card that keeps up with the camera. Here are some general rules for choosing a card:

  • If your camera is a consumer point-and-shoot model ($400 or less) chances are it works fine with any SD card. Some of the newest models can benefit from a 66x card for burst (multiple picture) or movie modes.
  • If your camera is a “prosumer” model or a digial SLR ($400 to $3000) choose the fastest card you can get for a good price, a 66x card if at all possible. These cameras are fast, and a fast card will improve their response time.

Note that I haven’t recommended 133x cards for any camera. The SD card specification (version 1.0) is limited to 66x, so the 133x cards work in a “double speed” mode available in version 1.1 of the specification. At this writing, no cameras take advantage of the full speed of these cards, but you may want to consider one anyway—there’s a good chance you’ll still have the card when you upgrade to the next camera.  However this faster speed is really great for Windows Vista SpeedBoost!  A lot of laptops now have the SD slot built-in them and works well with Vista SpeedBoost. 

Conclusion

If you want the final word on which card to choose, check your camera’s manual or specification for speed requirements. Note that “burst” or movie modes may require higher speeds than still photo modes. Another tip: find a review of your camera at a site like DPReview.com, which does timing tests on cameras to determine their speed with different cards.

Another thing to consider is getting pictures from your camera to your computer. If you have a fast card and a fast card reader, you’ll enjoy the faster transfer speeds even if your camera doesn’t need them. Most USB 2.0 card readers (available for $10 to $20) can handle very high speeds. In fact, this is the one area where the 133x cards actually live up to their promise.

One more tip: definitely choose one of the good name-brand cards over the cheaper generics. With potentially 500 or more photos at stake, you don’t want to take chances. Sandisk, Lexar, Viking, Verbatim, and Crucial are good brands.

Merry Christmas!
Credit Card Scam (Phone)

This scam is pretty slick since they provide YOU with all the information, except the one piece they want.

Note, the callers do not ask for your card number; they already have it. This information is worth reading. By understanding how the VISA & MasterCard Telephone Credit Card Scam works, you'll be better prepared to protect yourself.

One of our employees was called on Wednesday from "VISA", and I was called on Thursday from "Master Card".

The scam works like this: Person calling says, "This is (name), and I'm calling from the Security and Fraud Department at VISA. My Badge number is 12460. Your card has been flagged for an unusual purchase pattern, and I'm

calling to verify. This would be on your VISA card which was issued by (name of bank). Did you purchase an Anti-Telemarketing Device for $497.99 from a Marketing company based in Arizona?" When you say "No", the caller continues with, "Then we will be issuing a credit to your account. This is a company we have been watching and the charges range from $297 to $497, just under the $500 purchase pattern that flags most cards. Before your next statement, the credit will be sent to (gives you your address), is that correct?"

You say "yes". The caller continues - "I will be starting a Fraud investigation. If you have any questions, you should call the 1- 800 number listed on the back of your card (1-800-VISA) and ask for Security.

You will need to refer to this Control Number. The caller then gives you a 6 digit number. "Do you need me to read it again?"

Here's the IMPORTANT part on how the scam works. The caller then says, "I need to verify you are in

possession of your card". He'll ask you to "turn your card over and look for some numbers". ; There are 7 numbers; the first 4 are part of your card number, the next 3 are the security Numbers' that verify you are the possessor of the card. These are the numbers you sometimes use to make Internet purchases to prove you have the card. The caller will ask you to read the 3 numbers to him. After you tell the caller the 3 numbers, he'll say, "That is correct, I just needed to verify that the card has not been lost or stolen, and that you still have your card. Do you have any other questions?" After you say No, the caller then thanks you and states, "Don't hesitate to call back if you do", and hangs up.

You actually say very little, and they never ask for or tell you the Card number. But after we were called on Wednesday, we called back within 20 minutes to ask a question. Are we glad we did! The REAL VISA S ecurity Department told us it was a scam and in the last 15

minutes a new pur chase of $497.99 was charged to our card.

Long story - short - we made a real fraud report and closed the VISA account. VISA is reissuing us a new number. What the scammers want is the 3-digit PIN number on the back of the card. Don't give it to them. Instead, tell them you'll call VISA or Master card directly for verification of their conversation. The real VISA told us that they will never ask for anything on the card as they already know the information since they issued the card! If you give the scammers your 3 Digit PIN Number, you think you're receiving a credit. However, by the time you get your statement you'll see charges for purchases you didn't make, and by then it's almost too late and/or more difficul t to actually file a fraud report.

What makes this more remarkable is that on Thursday, I got a call from a "Jason Richardson of Master Card" with a word-for-word repeat of the VISA scam. This time I didn't let him finish. I hung up!

We filed a police report, as instructed by VISA. The police said they are taking several of these reports daily! They also urged us to tell everybody we know that this scam is happening.

 

Phishing Protection

We support Macafee and Symantec Anti-Virus solutions. Prevention is one of the the keys to keep your PC fast and safe.

How They Attack (Phishing):
Phishing is essentially an online con game and phishers are nothing more than tech-savvy con artists and identify thieves. They use SPAM, malicious Web sites, email messages and instant messages to trick people into divulging sensitive information, such as bank and credit card accounts.

How Do You:
Known Phishers, pretending to be legitimate companies, may use email to request personal information and direct recipients to respond through malicious web sites.
Phishers tend to use emotional language using scare tactics or urgent requests to entice recipients to respond.
The phish sites can look remarkably like legitimate sites because they tend to use the copyrighted images from legitimate sites.
Requests for confidential information via email or Instant Message tend to not be legitimate.
Fraudulent messages are often not personalized and may share similar properties like details in the header and footer.

 

SPAM Removal and Protection

We support Macafee and Symantec Anti-Virus solutions. Prevention is one of the the keys to keep your PC fast and safe.

How They Attack (SPAM):
Email SPAM is the electronic version of junk mail. It involves sending unwanted messages, often unsolicited advertising, to a large number of recipients. SPAM is a serious security concern as it can be used to deliver Trojan horses, viruses, worms, spy ware, and targeted phishing attacks.

How Do You Know:
Messages that do not include your email address in the TO: or CC: fields are common forms of SPAM
Some SPAM can contain offensive language or links to Web sites with inappropriate content

What To Do:
Install SPAM filtering/blocking software
If you suspect an email is SPAM, do not respond, just delete it
Consider disabling the email’s preview pane and reading emails in plain text
Reject all Instant Messages from persons who are not on your Buddy list
Do not click on URL links within IM unless from a known source and expected
Keep software and security patches up to date