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  • SanDisk SDCFX4-4096 4GB Extreme IV CompactFlash Card
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SanDisk SDCFX4-4096 4GB Extreme IV CompactFlash Card

by SanDisk

Available from these sellers.
  • Large 4GB Capacity
  • Read and write performance of 45MB/s with ESP Technology
  • Built to perform in the most extreme environments and temperatures—from -13º F to 185º F
  • Durable, reliable and thoroughly temperature tested (heat and cold); shock and vibration tested (industrial-grade RTV included for CompactFlash)
  • Priority toll-free technical support
1 new from $75.98


Technical Details

  • Brand Name: SanDisk
  • Model: SDCFX4-4096-901
  • Memory Storage Capacity: 4.0 GB

Product Details

  • Product Dimensions: 5.9 x 4.6 x 1.2 inches ; 3.2 ounces
  • Shipping Weight: 4 ounces
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • ASIN: B000HI4VHI
  • Item model number: SDCFX4-4096-901
  • Average Customer Review: 4.6 out of 5 stars  See all reviews (75 customer reviews)
  • Date first available at Amazon.com: October 2, 2001

Product Description

From the Manufacturer

From the Manufacturer

SanDisk Extreme� IV Compact Flash� 4 GB Memory Card
When incredible speed and total reliability are shoot-critical

On professional photo shoots where everything changes in the blink of an eye, SanDisk Extreme IV memory cards let you catch the shot, just as you imagined it. Delivering unmatched responsiveness and all the space you need, you’ll never miss a thing. Reliable in the most severe environments, SanDisk Extreme IV 45 MB/s Edition cards let you get more out of your DSLR or advanced camera—because your work deserves nothing less.

SanDisk Extreme® IV cards include SanDisk’s exclusive RescuePRO® Software, our leading-edge media recovery technology, so you can bring accidentally deleted images and files back to life.



Maximize your camera’s performance
  • Keep shooting without fear of running out of space
  • Get dependable performance every time
  • Don’t come up short, store more photos and videos





*1 gigabyte (GB) = 1 billion bytes. Some capacity not available for data storage. **1 megabyte (MB) = 1 million bytes; X = 150 KB/sec; based on internal testing; performance may be lower depending on host device. ***Excludes Germany and other regions which do not recognize limited warranty.


Just add a SanDisk Extreme® FireWire Reader (sold separately) to speed your transfers that much more



Just add a SanDisk Extreme® FireWire Reader (sold separately) to speed your transfers that much more



Choose SanDisk, the minds behind flash memory
As the pioneers of flash memory, SanDisk is known all over the planet. Wherever people take pictures, listen to music, use cell phones—or do much of anything at all with digital devices—they’re likely to be using a SanDisk memory card. That’s because, after 20 years in the business, SanDisk has never stopped innovating.

Product Description

As the leader in high-performance flash technology, SanDisk is introducing the newest flagship product specifically designed for medium format cameras with a digital back, targeted at the high-end professional photographers, for the Americas Photo channel. Extreme IV has extremely fast read/write speeds (45 MB/s). This line provides the durability and high-speed quality demanded for serious photography. SanDisk's award-winning technology solidifies the strength of the Extreme family of high-performance flash cards. It provides your customers the full line of SanDisk digital imaging products, from our entry-level blue label through this newest edition of our Extreme IV products. The Extreme IV CF card has the fastest speed available today, in a brand name you can trust.

Customer Questions & Answers

Customer Reviews

Worth paying extra for vs. no-name CF cards.
Thomas M. Quinn
These fast write speeds are desirable with large image files especially when uploading to a computer.
L. T. Beasimer
Love the new 4 GB Extreme IV CompactFlash Card!
PhotoshopDude

Most Helpful Customer Reviews

89 of 91 people found the following review helpful By I. Miller on July 29, 2007
I have used many cards with my D200; mostly the 2GB Extreme III version of this card. These are my first Extreme IV series cards in 4GB. My expectations for this card ran something like, same performance as my 2GB cards, maybe a little faster on computer downloads. I was not disapointed.

One interesting little bonus has shown up with these cards and my D200. While shooting on a long trip across Glacier National Park I averaged 700 shots per battery when using these cards. While using the older and slower cards I averaged 400 shots per card. I have shot thousands and thousands of pictures with my 2GB cards and I average between 400 and 500 per battery charge consistantly. This is the first time I have seen 700+ from a single charge on my D200. More shoots are required to establish the actual performance difference but so far there has been a noticable reduction in battery use with this card and the D200.
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57 of 60 people found the following review helpful By L. T. Beasimer TOP 500 REVIEWERVINE VOICE on May 3, 2008
Verified Purchase
With fast shooting high mega pixel DSLR cameras, the CF card can be a major performance factor. Write speeds, capacity, and power consumption all have an impact. The Extreme versions also have a wider temperature range, is impact resistant, and includes recovery software. Why purchase an expensive digital camera only to use a card that cannot keep up?

The Extreme IV cards read/write with a 40 MB/sec sequential read/write speed. These fast write speeds are desirable with large image files especially when uploading to a computer. DSLR cameras often have a buffer which holds images while writing to the card during continuous shots. At some point the card cannot write fast enough, preventing the camera from shooting until the buffer clears enough room for another image. In these cases the camera cannot write as fast as the card, the quick speeds may only be noticeable while uploading images to your computer.

As CF cards continue to decrease in price, they increase capacity. 1GB cards are inexpensive these days, but don't have the capacity I need. Two 2GB CF cards cost about as much and sometimes more than the same model 4GB CF card. Meanwhile the price of two 4GB cards is currently less expensive than the same model 8GB CF card. It appears that the 4GB is the current sweet spot on a cost per GB basis.

When it comes to the price, the trade off partially comes from power consumption. Other model CF cards may use more power to do the same job as this card to maintain a lower price. The Sandisk Extreme IV card's low power consumption means a longer battery life.

Special features of this card include withstanding temperatures from -13 to 185 degrees Fahrenheit (as indicated on the package).
Read more ›
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25 of 25 people found the following review helpful By Truth Seeker on October 6, 2007
Verified Purchase
First this is a great card for action digital photography... I'm using this with a Canon 30d and love it, but...

I am writing this review to possibly save would be buyers from an issue I had here on Amazon.

I purchased a "new" Sandisk Extreme IV 4gb card from one of the other sellers here on Amazon, trying to save about 15 bucks instead of just buying it new from Amazon.

Well, it turned out the card I received had all the packaging, labeling, and markings, and appeared in every outward way to be a Sandisk 4gb Extreme IV, but it was actually a 512mb card manufactured overseas and NOT by Sandisk. Unfortunately for me, because I didn't buy it from Amazon I was out my purchase price.

While most sellers are probably honestly selling a new or a used card, I was conned by a very motivated scam artist, so be careful who you buy this card from. Like I said, my card was advertised as being "new" and it looked EXACTLY like the real thing, but it definitely was NOT genuine.
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27 of 28 people found the following review helpful By Bob on May 8, 2007
Verified Purchase
Twice as fast as the Extreme III.... you'll need the fast, firewire reader from Sandisk to achieve that, though... these robust cards last many years, get the fastest so they will work in your future cameras! It comes with a CD containing RECOVERY software should you screw up. What a great price! Holds 247 RAW images from the Nikon D200 or THOUSANDS in .JPEG form.
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24 of 27 people found the following review helpful By William A. Long III on January 9, 2007
This product met all my expectations and more. The fireware reader is necessary though. The reader increases read speed by at least 5 times. Amazing speed with this card.
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13 of 14 people found the following review helpful By David G. Wilkins on September 1, 2008
Verified Purchase
I purchased this card in the hope that it would allow more shots to be taken in burst mode. I set up a Nikon D300 to shoot continuous mode, raw format, 12 bit depth, 1/500 second, f4 with auto ISO off, manual focus and made shots with Extreme IV, Extreme III 8 GB and Ultra II 4 GB cards. I made shots until the camera buffer filled and the shot rate paused. The Extreme IV allowed 19 shots, the Extreme III 18 and the Ultra II 16. I repeated the test 5 times with each card and got the same results. The only thing I found that affected the number of shots was file size. Dark subjects can be compressed more and as a consequence the buffer can hold more shots before the shot rate slows.

I used a SanDisk imagemate card reader to upload 200 shots to my computer from each of the cards. The Ultra II took 5 minutes 20 sec, the Extreme III took 4 minutes 5 seconds and the Extreme IV took 3 minutes 50 seconds. My card reader may not be fast enough to take full advantage of the Extreme IV read rate.

For me the additional one shot in continuous mode is not worth the price differential between Extreme III and IV. For ordinary shooting that doesn't involve continuous shooting in RAW mode, the Ultra II is good enough for me.

I have never had a problem with SanDisk cards the Extreme IV does come with recovery software. In my opinion it comes down to a question of whether or not the extra performance is worth the price differential.
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