3 thoughts on “SanDisk Extreme SSD 240 GB SATA 6.0 Gb-s 2.5-Inch Solid State Drive SDSSDX-240G-G25

  1. 269 of 285 people found the following review helpful
    5.0 out of 5 stars
    I LOVE this drive. Cool. Fast, fast, fast., April 11, 2012
    Sam (USA) –
    (TOP 1000 REVIEWER)

    Amazon Verified Purchase(What’s this?)

    Feb 28, 13 update: I’ll be receiving my 3rd Sandisk SSD today for my new Asus notebook which didn’t come with a SSD. The hard disk is noticeably sluggish, generates heat and noise and drains the battery. After using Sandisk SSDs on my other computers, I’m spoiled. A Sandisk SSD is probably the best component (highest ROI) one can add to a computer to dramatically improve performance.

    Quick review:

    * Really runs much faster than any hard disk (and I’ve got a bunch of new WD hard disks). Ignore what other people have written — everything runs MUCH faster on this SSD. Web applications, giant files. This sucker is FAST!
    * Runs very cool. I measured the temperature and it’s only a few degrees warmer than the temperature of the room
    * Very easy to transfer the contents of whatever sized hard disk you have use free easy-to-use software
    * Works in both desktop and laptop computers (I installed one in each of my computers).
    * You don’t have to be a geek to install the SSD. This is the first time I ever installed an SSD.

    You can read more if you want, but it’s not necessary. The solid state disk is fast, quiet and runs cool. You’ll love it.

    I saw this on Amazon’s “Today’s Deals” and at $119 for a 120GB SSD, I said, “Why not give it a try?”

    I installed this SSD on a laptop with Windows 7.

    Wow! this laptop is now really fast. Everything runs so much quicker. Windows Experience for the hard disk went from 5.9 to 7.7

    I’ve never seen Windows load so fast before. Applications and data load significantly faster.

    I was so impressed with the speed improvement, I then bought another SSD and installed it on my desktop computer using Windows XP3.

    [July 25, 12 UPDATE: I just received this Raytek MT6 Non-contact MiniTemp Infrared Thermometer. The ambient temperature next to the case computer running XP3 was 77 degrees. The Sandisk SSD is only 82 degrees (no cooling fan). On a laptop, the coolest temperature I could measure on the back of the laptop running Windows 7 was 86 degrees – the laptop was on my wife’s lap for hours so a lot of the heat came from her. Opening the back cover of the laptop, the Sandisk SSD was only 93 degrees. This is in a room that’s 77 degrees.]

    Using HD Tach,

    The burst speed for the SSD: 4027MB/s.
    Random access: 0.2ms
    CPU Utilization: 2%
    Average speed: 270MB/s

    The burst speed for a WD drive (WD1002FAEX) with 64MB of cache: 245MB/s
    Random access: 12ms
    CPU utilization: 1%
    Average speed: 113MB/s

    Numbers and benchmarks aside, the overall computer responsiveness is dramatically better. Suspending the computer now takes just a few seconds and waking it up is also extremely fast.

    [June 10, 2012 update: I’m now using Lightroom, Nik Dfine and Nik Sharpen which involves transferring >100MB files back and forth. There’s only a brief hesitation in-between each step.]

    Cloning from a hard disk to the SSD using Macrium Reflect v5.0 Free Edition worked perfectly.

    Out of simple curiosity, I installed XP3. XP3 installation took just 7 minutes. The 100+ Windows updates took only a few minutes.

    After running the SSD for a few hours, the SSD is barely warm. I can remove the hard disk fan and make the computer even quieter.

    My wife is a user. She doesn’t know or care about hardware or benchmarks. She does, however, makes unsolicited remarks from time to time how much better the laptop runs. The laptop used to drive her nuts since it was so slow. Now she’s happy.

    We’re absolutely delighted with the SSDs. Buy it. You’ll love it.

    These are the step-by-step instructions to clone your Windows 7 disk to the SSD:

    1. Download and install Macrium Reflect v5.0 Free Edition.
    2. Shut-down Windows
    3. Unplug laptop (if plugged into electrical outlet)
    4. Remove laptop battery
    5. Install SSD (in my laptop, I just had to remove a panel in the back and plug in the SSD). Note: You’ll have both the original hard disk and the new blank SSD installed.
    6. Put battery back into computer and plug laptop into an electrical outlet
    7. Start Windows
    8. Launch Macrium Reflect v5.0 Free Edition
    9. Clone partitions from hard disk to the SSD (this works even if the SSD is smaller than the original hard disk). In my case, this took about an hour. Note: Cloning the hard disk to the SSD with Macrium is simply dragging the Windows partitions to the SSD. Partitions are automatically resized if necessary.
    10. Shut-down Windows
    11. Unplug laptop from electrical outlet
    12. Remove hard disk from laptop and save it somewhere safe just in case you ever need a backup. Make sure…

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  2. 444 of 489 people found the following review helpful
    1.0 out of 5 stars
    Warning: poor performance with some Macs, and defective TRIM., July 18, 2012
    D. McLean

    This review is from: SanDisk Extreme SSD 240 GB SATA 6.0 Gb-s 2.5-Inch Solid State Drive SDSSDX-240G-G25 (Personal Computers)

    This is probably the fastest and most reliable SSD in its price class…except for it failing to deliver its rated speed due to defective firmware.

    The problem occurs with MacBooks and desktop models that use the NVidia SATA controller. (You can see the controller under System Profiler->Serial-ATA.) The Sandisk Extreme will connect at a negotiated link speed half that of the controller. That means for a SATA 2 (3 Gbps) controller, transfer speeds will be limited to about 120 MB/s, a quarter of the SSD’s rated speed. SATA 3 (6 Gbps) will be limited to about 250 MB/s in practice.

    This problem of reduced link speed has appeared extensively with various combinations of SSD brands and Mac models. Both OWC and OCZ have already issued firmware updates that correct the problem, giving their customers the full speed capacity of their SSDs. As of the writing, Sandisk has not corrected the problem, nor committed to doing so.

    If you are thinking of installing any SSD in a Mac, I suggest you first search for “negotiated link speed” <your mac model> <ssd model> to find out whether your particular combination will suffer this defect.

    As for myself, after days of research, waiting for a good price, and great anticipation, I will be returning my Sandisk Extreme tomorrow. So disappointed.

    (MacBook late 2009; SATA 2 NVidia controller; Sandisk Extreme 240GB)

    Update 19-July-2012:
    I spoke with Sandisk technical support (in India). They acknowledge a problem with slow link speeds with the NVidia MCP79 controller. Here is their email response:
    We really apologize for the inconvienience caused to you, however we would like to inform you that this is a known issue wih Sandisk and this issue has already been escalated to the R&D team for research and we are expecting a fix on this issue pretty soon regarding the compatibility of Nvidia MCP79 graphics card and Macbook pro and the Sandisk SSD getting the appropriate speed as per design.

    Update 3-August-2012:
    My attempts to get useful information from SanDisk have turned into a series of Kafkaesque bureaucratic runarounds. After hours on the phone and countless emails with clueless and evasive support technicians, I have learned only the following:

    1) The problem of connecting at half the SATA controller speed occurs with several different nVidia controllers.

    2) The issue has been “escalated to the R&D department”. R&D has known of the defect since March.

    3) Since March, SanDisk has failed to either issue a fix or to inform potential buyers that this SSD may not work at full speed in their computer.

    4) The Corporation will not state “if and when SanDisk will make firmware updates for specific chipset versions or OS.”

    So I suggest again that before buying this SSD you thoroughly research whether the link speed defect occurs with your particular SATA controller. At this point I have no confidence that SanDisk will issue a fix, nor in the integrity of the company to respond to the needs of (actual and potential) customers honestly and effectively.

    I will monitor the situation until August 20, 2012 (the return date), and will update here if a fix is issued by then.

    Update 21-August-2012
    Thanks for the feedback. I feel happy to have saved some people from the hassle I have experienced with this product.

    Today’s call to SanDisk confirms that they know of the issue, have no fix, and no date for a fix. The support agent even suggested it was best to RMA the device at this point.

    And, gentle readers, it gets worse. Some of you may understand what the TRIM command is. TRIM is sent by the OS to inform the SSD which blocks are no longer in use. This information in turn allows the SSD to garbage collect those blocks, which keeps the SSD’s write speed up to spec. It turns out that both TRIM and garbage collection are poorly implemented in this SSD. After use (2x filled), its write speed falls to 15-30% of its initial speed. Issuing TRIM restores write speed to about 60% of rated speed, but apparently after use the SSD can never regain its fresh-out-of-box rated write speeds. You can view the actual measurements here:

    This problem with GC and TRIM seems to affect *all* SSDs based on the newest SandForce 2281 controller, not just SanDisk’s. The manufacturers have known about this defect for five months. Apparently, all the various Corporations though it was unimportant to let their customers know we are buying defective products that will irrecoverably lose their rated write speed after use. You can read the sordid details here:

    Rumor is that SandForce has already issued a firmware update that fixes TRIM/GC. We are waiting for the various manufacturers to customize it and issue their own updates. Any day now.

    In case you have not caught it, I am…

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  3. 56 of 63 people found the following review helpful
    5.0 out of 5 stars
    This drive can FLY, April 16, 2012
    Kent (Houston, Texas) –

    Amazon Verified Purchase(What’s this?)

    My system basics:
    Windows 7, 64bit
    Dell Vostro 3550 about 6 months old.
    Intel Core I5 (quad) 2.3ghz with turbo.
    8GB dram
    Sata 3 drive controller
    Crucial M4 128GB SSD, Read 500MB/sec, write speed 200MB/sec (was originally WD 7200rpm 320GB)
    My qualifications: Electronic Engineer/Project manager. PC owner for 25+ years.

    Opening comments: I have owned pc’s for 25years. THIS IS ABSOLUTELY THE BEST BANG FOR THE BUCK UPGRADE YOU COULD EVER HOPE TO BUY!!!! IT IS EVEN BETTER THAN REPLACING A 2YR OLD COMPUTER OR LAPTOP AND OF COURSE CHEAPER!! Other benefits: windows is more stable. If you have a lot of programs open at the same time, the computer remains stable all day. Now, I rarely need to reboot.

    I bought a Crucial M4 SSD (solid state drive) about a 2 month’s ago and was amazed at the speed. Can’t go back to mechanical hard-drives. I bought this one because it was spec’d faster than the M4 and I needed a back-up drive. This technology does not have a reliability track record for long term use as a computer drive. Once a week, I create clone drive copy as a back up. If the drive fails this clone can be popped in my laptop and I’m ready to go in 10 minutes. No restore needed except the few files I have added or changed.

    Summary 1st: Both drives are excellent choices. (Sandisk Extreme and Crucial M4)
    On my laptop, in every day use Sandisk extreme is slightly faster.

    See posted photo’s for actual data.
    a)According to “ASS SD” benchmark test. Crucial is much faster than this drive (Sandisk Extreme.)
    b)According to “Benchmark” speed test: Sandisk Extreme is faster. SanDisk write speed blows away the Crucial M4.

    Note: Electrical specs like statistics can be presented in a way that is deceptive.

    Spec from SanDisk website for the Extreme (not in Amazon’s description)
    Performance 120GB
    Sequential Read (up to) 550 MB/s 550 MB/s 540 MB/s
    Sequential Write (up to) 510 MB/s 520 MB/s 460 MB/s

    I like this drive a lot. Great performance!! Definitely would recommend it to a friend.

    I will update this review if there are any reliability problems.

    Hope this helps you make an informed decision on what to buy.

    Thanks to all those who have posted reviews on Amazon. They have been extremely helpful in making good purchase decisions on Amazon.

    7-22-12 3month update: Drive has been performing flawlessly. No problems or issues. Love it’s speed and it’s quiet.

    1-6-13 Update (8 months) Drive has been trouble free. There are a few drive out there now that write at or near 500Mbs. My computer continues to be very stable all day (windows 7)

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