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  • Crucial 4GB Kit (2GBx2) DDR2 (PC2-6400) DIMM 240-Pin Desktop Memory Modules CT2KIT25664AA800
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Crucial 4GB Kit (2GBx2) DDR2 (PC2-6400) DIMM 240-Pin Desktop Memory Modules CT2KIT25664AA800

by Crucial
| 40 answered questions

List Price: $79.99
Price: $48.00 + $6.45 shipping
You Save: $31.99 (40%)
Only 4 left in stock.
Ships from and sold by ETARATECH.
4GB KIT (2GBx2)
  • Sold Individually
40 new from $48.00 3 used from $40.00

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Frequently Bought Together

Crucial 4GB Kit (2GBx2) DDR2 (PC2-6400) DIMM 240-Pin Desktop Memory Modules CT2KIT25664AA800 + Windows 7 Professional SP1 64bit (OEM) System Builder DVD 1 Pack (New Packaging) + WD Blue 1 TB Desktop Hard Drive: 3.5 Inch, 7200 RPM, SATA 6 Gb/s, 64 MB Cache - WD10EZEX
Price for all three: $243.93

These items are shipped from and sold by different sellers.

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Special Offers and Product Promotions

Capacity: 4GB KIT (2GBx2)
  • Buy Used and Save: Buy a Used "Crucial 4GB Kit (2GBx2) DDR2 (PC2-6400) DIMM 240-P..." and save 49% off the $79.99 list price. Buy with confidence as the condition of this item and its timely delivery are guaranteed under the "Amazon A-to-z Guarantee". See all Used offers.

Compare to Similar Memory Modules

This item: Crucial 4GB Kit (2GBx2) DDR2 (PC2-6400) DIMM 240-Pin Desktop Memory Modules …

PNY Optima 4GB (2x2 GB) DDR2 800 MHz PC2-6400 Desktop DIMM Memory Module Dual Channel Kit …

Crucial 4GB Kit (2GBx2) DDR2 800MHz (PC2-6400) CL6 SODIMM 200-Pin Notebook Memory Modules …

Crucial CT2CP25664AA667 4GB (2GBx2) 240-pin DIMM DDR2 PC2-5300 Memory Module

Customer Rating 4.7 out of 5 stars   (379) 4.3 out of 5 stars   (240) 4.7 out of 5 stars   (260) 4.6 out of 5 stars   (456)
Price $48.00$44.98$51.53$59.15
Shipping $6.45$4.98$4.98FREE Shipping
Sold By ETARATECHNEMIX RAMNEMIX RAMNEMIX RAM
Total Size 4 Information not provided 4 Information not provided
Number of Packages 1 1 1 1
Memory per Stick 4 GB 2.0 GB 4 GB 4 GB
Number of Pins 240 240 Information not provided 240
Memory Clock Speed 800 MHz 800 MHz 800 MHz 667 MHz
Memory Technology DRAM DDR2 DDR2 DDR2
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Technical Details

Capacity: 4GB KIT (2GBx2)
  • Company Program: Crucial
  • Configuration: 256Meg x 64
  • DDR Timings: CL=6
  • DIMM Type: Unbuffered
  • Density: 4GB kit (2GBx2)
  See more technical details

Product Details

Capacity: 4GB KIT (2GBx2)
  • Product Dimensions: 7 x 4 x 0.5 inches ; 2.4 ounces
  • Shipping Weight: 3.5 ounces (View shipping rates and policies)
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • ASIN: B0011A4UZE
  • Item model number: CT2CP25664AA800
  • Average Customer Review: 4.7 out of 5 stars  See all reviews (379 customer reviews)
  • Amazon Best Sellers Rank:
  • Date first available at Amazon.com: September 14, 2004

Product Description

Capacity: 4GB KIT (2GBx2)

Every day, you rely on your computer to make your life easier. A Crucial DRAM upgrade can help your system run faster, and it's one of the easiest, most affordable ways to improve system performance. Reap the benefits doing everything from everyday system tasks to mission-critical applications. For over 12 years, Crucial has been recognized as a leader in DRAM upgrades. Our products help people achieve greater system performance through improved productivity, reliability, and speed. As part of one of the world’s largest DRAM manufacturers—Micron Technology—our long tenure of engineering and manufacturing expertise allow us to build high-quality, system-specific memory solutions for customers. We back our products by guaranteeing system compatibility, limited lifetime warranties, and outstanding service and support. At Crucial, we're the Memory Experts.

Customer Questions & Answers

Customer Reviews

Works great, easy to install.
Larry22
My computer is running much faster now.
Elizabeth S.
What can I say, it RAM, it just works.
Wayne Trout

Most Helpful Customer Reviews

31 of 32 people found the following review helpful By Gregory Law on July 27, 2008
Size Name: 4GB KIT (2GBx2) Verified Purchase
I've been using Crucial memory in my notebook and desktop computers for years because Crucial memory is very reliable and remains one of the true "plug 'n play" products on the market. I purchased two 4GB kits to expand my desktop computer to 8GB to give me a little more headway to run Windows Server 2003 and Windows Server 2008 in a virtual machine on my host running Windows Vista x64.

Although Crucial PC2-6400 DDR2 memory is not the absolute fastest memory available, it is significantly cheaper than the "Extreme" varieties and offers plenty of speed for most demanding applications (image editing, movie editing, software development, etc.). Windows Vista x64 gives this memory a rating of 5.7, which is very near the top of the scale in the current rating system.
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15 of 15 people found the following review helpful By Aaron Grimm on July 28, 2010
Size Name: 4GB KIT (2GBx2) Verified Purchase
I recently installed the 64 bit version of Windows 7 on my CPU, enabling me to go from 4 gigs of RAM to 8. I researched what memory would work best with my current hardware configuration, and came across Crucial's 4GB memory set. It's solid, easy to install, compatible with everything I have running (which is a sort of Frankenstein configuration), and has sped my computer up considerably. I am quite pleased with this product and feel it's reasonably priced.
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10 of 10 people found the following review helpful By Ahmed Roberson on April 14, 2010
Size Name: 4GB KIT (2GBx2) Verified Purchase
This item works perfectly in my HP PC. I bought two sticks previously, and figured I should buy two more for a matching set, and 8-GIGS of RAM....BIG help with my Photoshop Speed!!

Not a single regret!!!
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6 of 6 people found the following review helpful By D. Ripp on September 13, 2011
Size Name: 4GB KIT (2GBx2) Verified Purchase
I bought this ram for my Dell XPS 420. I am running virtual machines for my college courses and the three gigs I had did not cut it. The XPS Book states you can only have up to 4 gigs, but I took a chance based on info from other forums and bought this 8 gig kit. Opened my case, popped out the old, popped in the new, and was done. Booted up my 64-bit Windows 7 and the RAM was detected. Computer has been running non-stop and the memory has performed flawlessly. No complaints at all!
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6 of 6 people found the following review helpful By William A. Curtis on June 19, 2010
Size Name: 2GB KIT (1GBx2) Verified Purchase
I was looking to upgrade (speed-up) our Dell Dimension E520 PC running XP at work and the manual indicated the necessity for installing new memory modules in pairs. I bought this 2 x 1GB memory kit hoping it would fit the bill. I wasn't really concerned about cost, but this kit was EXTREMELY cost-effective.

I installed the memory this afternoon, and it worked without a hitch.

Great product Crucial!

Wonderful, speedy service from Amazon, too (as usual).
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5 of 5 people found the following review helpful By Clem C. Lambeth on September 17, 2010
Size Name: 1GB Verified Purchase
My 7-year-old XP was continually running slow and freezing up in spite of considerable maintenance with anti-virus, malware, optimization and registry fix software. My memory meter was always running low. I was concerned about spending money not knowing if the RAM would fix my problems but it did. Now it boots up quickly and never gives me any problems like I had before. VERY HAPPPY.
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5 of 5 people found the following review helpful By James D. Draper on June 14, 2010
Size Name: 1GB Verified Purchase
Our secretary has a Dell Dimension 4700 Plain Jane PC with 512Mb of RAM running Windows XP. She complained that it was slowing down so to keep her happy I pulled out the specs to see what was required for an upgrade. The Dell part number for a 1 GB memory module was A0735470 (aka SNPXG700C/1G). Dell's listed price was $42.99 plus S&H. An online search identified the Crucial Technology part as being equivalent at $25.83 with free S&H from Amazon. My first try at installation squeezed underneath her desk with bad lighting didn't take so I tried repositioning the card again and I finally got it snapped in correctly. After a reboot she was back in business with 1.5 GB of RAM. Total time may have been 10 or 15 minutes.
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3 of 3 people found the following review helpful By David C. Arlund on November 28, 2011
Size Name: 4GB KIT (2GBx2) Verified Purchase
Price was great (slighty less than others). Arrived better than promised, works greatly. Would shop with this vendor again and again. Thanks for a great deal and a great product.
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