US sign in/register my cart search store memory solid state drives upgrades by device community support Crucial 2GB DDR2-800 UDIMM CT25664AA800 Brand: Crucial Form Factor: UDIMM Total Capacity: 2GB Warranty: Limited Lifetime * Specs: DDR2 PC2-6400 * CL=6 * Unbuffered * NON-ECC * DDR2-800 * 1.8V * 256Meg x 64 Series: Crucial view all product details 425 reviews Add to wish listqty 1 Where To Buy add to cart Where To Buy Will it work with my system? Select your system to see if this part is compatible. 1 select manufacturer installation guides desktop install 2 select product line 3 select model you may also be interested in: laptop install General DRAM installation guide Limited lifetime DRAM warranty 7 bit Mac/PC screwdriver ESD Reusable Wriststrap Screwdriver for DRAM/SSD PC add to cart add to cart add to cart Crucial 2GB DDR2-800 UDIMM product information Product Specifications Brand Crucial Form Factor UDIMM Total Capacity 2GB Warranty Limited Lifetime Specs DDR2 PC2-6400 * CL=6 * Unbuffered * NON-ECC * DDR2800 * 1.8V * 256Meg x 64 * 0 Product Specifications we take care of our customers Series Crucial ECC NON-ECC Module Qty 1 Speed 1066 MT/S Tracer False Voltage 1.8V DIMM Type Unbuffered Bullet Features Increases system performance More information Crucial Desktop Memory The fastest, easiest way to improve your desktop's performance There's an easy cure for a slow computer: more memory. Designed to help your system run faster and smoother, Crucial Desktop Memory is one of the easiest and most affordable ways to improve your system's performance. Load programs faster. Increase responsiveness. Run data-intensive applications with ease, and increase your desktop's multitasking capabilities. Make everything on your computer faster Memory is a component in your computer that allows for short-term data access. Since your system's moment-to-moment operations rely on short-term data access - loading applications, browsing the Web or editing a spreadsheet - the speed and amount of memory in your system plays a critical role. Load apps in seconds by increasing the speed of your memory and installing more of it. Multitask with ease If you're like us, you use your computer to do lots of things at once. You might be editing a document, while also looking at pictures and browsing the Internet. This naturally leads to a performance problem: every app you're running requires memory and competes for a limited pool of resources. Overcome this by installing high-density modules in each memory slot for seamless multitasking. Install with ease - no computer skills required With just a screwdriver, your owner's manual, and a few minutes of time, you can install memory - no computer skills necessary. Just watch one of our three-minute install videos, and we'll walk you step-by-step through the process. Don't pay a computer shop to do something you can do in minutes! Maximize the value of your system At a fraction of the cost of a new system, a memory upgrade is one of the most affordable ways to increase performance. Get more out of your desktop by giving it the resources it needs to perform. Micron(R) quality -- a higher level of reliability. As a brand of Micron, one of the largest memory manufacturers in the world, Crucial memory represents the future of workstation and server capability. From the original DDR technology to DDR4, we've engineered the memory technologies that have powered the world's systems for 35 years and counting. Designed for leading platforms, compatible with OEM systems and warranties, and backed by a limited lifetime warranty, Crucial memory pushes the limits on performance. product reviews Do you have questions about this product? Get answers from real customers and in-house experts with AnswerBox. 1 Question | 1 Answer Displaying question 1 Q: Why is this memory not compatible with Dell Dimension E510? What is the difference between this memory (CT25664AA800) and CT1278833? Thanks! Asked on 8/9/2011 by Anonymous 1 answer A: That particular memory module is guaranteed to be compatible with the E510 the part number for it is CT1278832. CT1278833 refers to a 4Gb kit (2x CT1278832). Answered on 8/10/2011 by Crucial Support from Meridian, Idaho Displaying question 1 Do you have a question about this product? REVIEW SNAPSHOT(R) by PowerReviews 4.8 (based on 425 reviews) 9 7 % of respondents would recommend this to a friend. PROS CONS BEST USES Reliable (274) Fast (202) No instructions included (13) Increased performance (280) Increases speed (196) Difficult to install (7) Easy to install (138) No increase in speed (7) Multiple desktop applications (216) Large capacity (96) Easy to install (3) Multimedia (119) REVIEWER PROFILE: Power user (227), Casual user (187) PRIMARY USE: Personal (345), Business (66) Write a Review Most Liked Positive Review Most Liked Negative Review No More Blue Screen of Death! Upgrade for Dell Optiflex 330 In April of 2009 my brother-inlaw built a new computer system for me. This system had 2X1GB sticks of RAM manufactured by a Crucial rival. For a year I was plagued by Bl... Read complete review VS I upgraded my 2GB memory on the spare computer to the maximum of 4GB (allowed by the motherboard) when I installed Windows 7. The install went fine and Windows recognized the increased memory right... Read complete review Reviewed by 425 customers Displaying reviews 1-10 Back to top Sort by Newest Previous | Next 5.0 Perfect Service By T o m from New Jersey About Me Power user PROS CONS Fast 10/3/2016 BEST USES Increased Performance Increases Speed Large Capacity Reliable Performance Comments about Crucial 2GB 240-pin DIMM DDR2 PC2-6400: The service was excellent as usual. PRIMARY USE: Business BOTTOM LINE Yes, I would recommend this to a friend Was this review helpful? Yes / No - You may also flag this review By CraigP from Manhattan Beach, CA About Me Power user Great! 5.0 RAM works PROS CONS Delivery 9/28/2016 BEST USES Increased Performance Fast Multiple desktop applications Increases Speed Large Capacity Pricing Reliable Performance Comments about Crucial 2GB 240-pin DIMM DDR2 PC2-6400: RAM upgrade for aging Business PC, an in expensive wand effective way to help boost spreadsheet performance and over speed. PRIMARY USE: Business BOTTOM LINE Yes, I would recommend this to a friend Was this review helpful? Yes / No - You may also flag this review By Wearetheservice from Miami, FL About Me Casual User (0 o f 1 customers found this review helpful) 9/27/2016 5.0 When we need computer memory we buy Crucial for performance. PROS CONS BEST USES Fast Gaming Increases Speed Increased Performance Reliable Performance Multimedia Wearetheservice Wearetheservice Comments about Crucial 2GB 240-pin DIMM DDR2 PC2-6400: Great for getting the most out of Facebook and Zynga games. PRIMARY USE: Personal BOTTOM LINE Yes, I would recommend this to a friend Was this review helpful? Yes / No - You may also flag this review By Flyin-Ham from East Rochester, NY About Me Casual User 5.0 What can you say about RAM? PROS CONS Fast 9/23/2016 BEST USES Increased Performance Increases Speed Large Capacity Reliable Performance Comments about Crucial 2GB 240-pin DIMM DDR2 PC2-6400: No complaints. Installed quickly and easily and performs as expected. What more could you want? PRIMARY USE: Personal BOTTOM LINE Yes, I would recommend this to a friend Was this review helpful? Yes / No - You may also flag this review By Mike the IT guy from Fairbanks, AK About Me Power user 5.0 Compatible, Reliable, Affordable. PROS CONS Increases Speed 9/23/2016 BEST USES Increased Performance Reliable Performance Multiple desktop applications Comments about Crucial 2GB 240-pin DIMM DDR2 PC2-6400: We try to extend the useful life of the PCs on our network to save money and be environmentally responsible. Upgrading RAM with memory from Crucial helps us do that. Crucial always has the RAM we need to allow us to make an older computer ready to run the latest OS and software and handle professional workloads all day everyday. PRIMARY Business USE: BOTTOM LINE Yes, I would recommend this to a friend Was this review helpful? Yes / No - You may also flag this review 5.0 2GB memory By boddidog from Talent, Oregon About Me Casual User PROS CONS Increases Speed 9/23/2016 BEST USES Multiple desktop applications Comments about Crucial 2GB 240-pin DIMM DDR2 PC2-6400: Easy to install, computer recognized it immediately. PRIMARY USE: Personal BOTTOM LINE Yes, I would recommend this to a friend Was this review helpful? Yes / No - You may also flag this review By Mr Wizard from California About Me Power user (1 o f 1 customers found this review helpful) 4/9/2016 5.0 Crucial system analyzer gave me wrong answer. PROS CONS BEST USES Fast Wrong Memory Increases Speed For My Pc Large Capacity Reliable Performance Comments about Crucial 2GB 240-pin DIMM DDR2 PC2-6400: Great memory. Too bad the Crucial System Analyzer recommended the memory for an x64 system when mine is x32 which can't take the amount of memory it said. I love Crucial memory and have been using it for decades. The system advisor needs to pay attention to the OS. PRIMARY USE: Personal BOTTOM LINE Yes, I would recommend this to a friend Was this review helpful? Yes / No - You may also flag this review By rim from Albany, NY About Me Casual User 5.0 Completely met my expectations PROS CONS 4/2/2016 BEST USES Fast No Instructions Increased Performance Increases Speed Included Large Capacity Reliable Performance Comments about Crucial 2GB 240-pin DIMM DDR2 PC2-6400: My Windows 7 pc had become increasingly slower to the point of taking over a minute to bring up a simple web site. An IT specialist examined it and recommended more memory, and he pointed me to your product. I ordered and installed it, and the computer now runs at a normal speed, to the delight of my entire family. PRIMARY USE: Personal BOTTOM LINE Yes, I would recommend this to a friend Was this review helpful? Yes / No - You may also flag this review By HLB from Santa Barbara, CA About Me Power user 4.0 some compatibility issues PROS CONS Increases Speed Difficult To Install 4/2/2016 BEST USES Increased Performance Multimedia Multiple desktop applications Comments about Crucial 2GB 240-pin DIMM DDR2 PC2-6400: Had 2x2GB existing memory with two open slots. Added 2x2GB Crucial memory using modules recommended by Crucial system scan. Old memory and new Crucial memory work when separately installed, but not together. When both are present (independent of which slots are used) there is a black screen and no BIOS splash. To get the upgrade to install, I had to flash the BIOS with a newer firmware version. That was tedious and time consuming for my older motherboard. Finally, the upgrade now works well. PRIMARY USE: Personal BOTTOM LINE Yes, I would recommend this to a friend Was this review helpful? Yes / No - You may also flag this review 4.0 Old Pc By Y o ! from I L PROS About Me Casual User 4/1/2016 CONS BEST USES Increases Speed Increased Performance Comments about Crucial 2GB 240-pin DIMM DDR2 PC2-6400: It improved performance a little bit. For the price its totally worth it. PRIMARY USE: Personal BOTTOM LINE Yes, I would recommend this to a friend Was this review helpful? Yes / No - You may also flag this review Displaying reviews 1-10 Back to top Previous | Next REVIEW SNAPSHOT(R) by PowerReviews 4.8 (based on 425 reviews) 9 7 % of respondents would recommend this to a friend. PROS CONS BEST USES Reliable (274) Fast (202) No instructions included (13) Increased performance (280) Increases speed (196) Difficult to install (7) Easy to install (138) No increase in speed (7) Multiple desktop applications (216) Large capacity (96) Easy to install (3) Multimedia (119) REVIEWER PROFILE: Power user (227), Casual user (187) PRIMARY USE: Personal (345), Business (66) Write a Review Most Liked Positive Review Most Liked Negative Review No More Blue Screen of Death! Upgrade for Dell Optiflex 330 In April of 2009 my brother-inlaw built a new computer system for me. This system had 2X1GB sticks of RAM manufactured by a Crucial rival. For a year I was plagued by Bl... Read complete review VS I upgraded my 2GB memory on the spare computer to the maximum of 4GB (allowed by the motherboard) when I installed Windows 7. The install went fine and Windows recognized the increased memory right... Read complete review Reviewed by 425 customers Sort by Newest Displaying reviews 1-10 Back to top Previous | Next 5.0 Perfect Service By T o m from New Jersey About Me Power user PROS CONS Fast 10/3/2016 BEST USES Increased Performance Increases Speed Large Capacity Reliable Performance Comments about Crucial 2GB 240-pin DIMM DDR2 PC2-6400: The service was excellent as usual. PRIMARY USE: Business BOTTOM LINE Yes, I would recommend this to a friend Was this review helpful? Yes / No - You may also flag this review By CraigP from Manhattan Beach, CA About Me Power user Great! 5.0 RAM works PROS CONS Delivery 9/28/2016 BEST USES Increased Performance Fast Multiple desktop applications Increases Speed Large Capacity Pricing Reliable Performance Comments about Crucial 2GB 240-pin DIMM DDR2 PC2-6400: RAM upgrade for aging Business PC, an in expensive wand effective way to help boost spreadsheet performance and over speed. PRIMARY USE: Business BOTTOM LINE Yes, I would recommend this to a friend Was this review helpful? Yes / No - You may also flag this review By Wearetheservice from Miami, FL About Me Casual User (0 o f 1 customers found this review helpful) 9/27/2016 5.0 When we need computer memory we buy Crucial for performance. PROS CONS BEST USES Fast Gaming Increases Speed Increased Performance Reliable Performance Multimedia Wearetheservice Wearetheservice Comments about Crucial 2GB 240-pin DIMM DDR2 PC2-6400: Great for getting the most out of Facebook and Zynga games. PRIMARY USE: Personal BOTTOM LINE Yes, I would recommend this to a friend Was this review helpful? Yes / No - You may also flag this review By Flyin-Ham from East Rochester, NY About Me Casual User 5.0 What can you say about RAM? PROS CONS Fast 9/23/2016 BEST USES Increased Performance Increases Speed Large Capacity Reliable Performance Comments about Crucial 2GB 240-pin DIMM DDR2 PC2-6400: No complaints. Installed quickly and easily and performs as expected. What more could you want? PRIMARY USE: Personal BOTTOM LINE Yes, I would recommend this to a friend Was this review helpful? Yes / No - You may also flag this review By Mike the IT guy from Fairbanks, AK About Me Power user 5.0 Compatible, Reliable, Affordable. PROS Increases Speed Reliable Performance CONS 9/23/2016 BEST USES Increased Performance Multiple desktop applications Comments about Crucial 2GB 240-pin DIMM DDR2 PC2-6400: We try to extend the useful life of the PCs on our network to save money and be environmentally responsible. Upgrading RAM with memory from Crucial helps us do that. Crucial always has the RAM we need to allow us to make an older computer ready to run the latest OS and software and handle professional workloads all day everyday. PRIMARY USE: Business BOTTOM LINE Yes, I would recommend this to a friend Was this review helpful? Yes / No - You may also flag this review 5.0 2GB memory By boddidog from Talent, Oregon About Me Casual User PROS CONS Increases Speed 9/23/2016 BEST USES Multiple desktop applications Comments about Crucial 2GB 240-pin DIMM DDR2 PC2-6400: Easy to install, computer recognized it immediately. PRIMARY USE: Personal BOTTOM LINE Yes, I would recommend this to a friend Was this review helpful? Yes / No - You may also flag this review By Mr Wizard from California About Me Power user (1 o f 1 customers found this review helpful) 4/9/2016 5.0 Crucial system analyzer gave me wrong answer. PROS CONS BEST USES Fast Wrong Memory Increases Speed For My Pc Large Capacity Reliable Performance Comments about Crucial 2GB 240-pin DIMM DDR2 PC2-6400: Great memory. Too bad the Crucial System Analyzer recommended the memory for an x64 system when mine is x32 which can't take the amount of memory it said. I love Crucial memory and have been using it for decades. The system advisor needs to pay attention to the OS. PRIMARY USE: Personal BOTTOM LINE Yes, I would recommend this to a friend Was this review helpful? Yes / No - You may also flag this review By rim from Albany, NY About Me Casual User 5.0 Completely met my expectations PROS CONS 4/2/2016 BEST USES Fast No Instructions Increased Performance Increases Speed Included Large Capacity Reliable Performance Comments about Crucial 2GB 240-pin DIMM DDR2 PC2-6400: My Windows 7 pc had become increasingly slower to the point of taking over a minute to bring up a simple web site. An IT specialist examined it and recommended more memory, and he pointed me to your product. I ordered and installed it, and the computer now runs at a normal speed, to the delight of my entire family. PRIMARY USE: Personal BOTTOM LINE Yes, I would recommend this to a friend Was this review helpful? Yes / No - You may also flag this review By HLB from Santa Barbara, CA About Me Power user 4.0 some compatibility issues PROS CONS Increases Speed Difficult To Install 4/2/2016 BEST USES Increased Performance Multimedia Multiple desktop applications Comments about Crucial 2GB 240-pin DIMM DDR2 PC2-6400: Had 2x2GB existing memory with two open slots. Added 2x2GB Crucial memory using modules recommended by Crucial system scan. Old memory and new Crucial memory work when separately installed, but not together. When both are present (independent of which slots are used) there is a black screen and no BIOS splash. To get the upgrade to install, I had to flash the BIOS with a newer firmware version. That was tedious and time consuming for my older motherboard. Finally, the upgrade now works well. PRIMARY USE: Personal BOTTOM LINE Yes, I would recommend this to a friend 1 Was this review helpful? Yes / No - You may also flag this review 4.0 Old Pc By Y o ! from I L PROS About Me Casual User CONS Increases Speed 4/1/2016 BEST USES Increased Performance Comments about Crucial 2GB 240-pin DIMM DDR2 PC2-6400: It improved performance a little bit. For the price its totally worth it. PRIMARY USE: Personal BOTTOM LINE Yes, I would recommend this to a friend Was this review helpful? Yes / No - You may also flag this review Displaying reviews 1-10 Back to top about warranty returns payment shipping international (c) 2017 Micron Technology, Inc. All rights reserved CA SB 657 terms of sale privacy newsletter terms of use environmental Previous | Next