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installation guides
General DRAM installation guide
Limited lifetime DRAM warranty
Product Specifications
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 •
you may also be interested in:
Crucial 2GB DDR2-800 UDIMM
product information
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
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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® 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?
REVIEW SNAPSHOT® by PowerReviews
4.8 (based on 425 reviews)
PROS
Reliable (274)
Fast (202)
Increases speed (196)
Easy to install (138)
Large capacity (96)
CONS
No instructions
included (13)
Difficult to install (7)
No increase in speed (7)
Easy to install (3)
BEST USES
Increased
performance (280)
Multiple desktop
applications (216)
Multimedia (119)
REVIEWER PROFILE: Power user (227), Casual user (187)
PRIMARY USE: Personal (345), Business (66)
Write a Review
97% of respondents would recommend this to a friend.
Reviewed by 425 customers Sort by
Newest
Displaying reviews 1-10
Back to top
Previous |
Next »
Get answers from real customers and in-house experts with AnswerBox.
1 Question | 1 Answer
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
Do you have a question about this product?
Displaying question 1
Displaying question 1
Most Liked Positive
Review
No More Blue Screen of
Death!
In April of 2009 my brother-in-
law 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
Most Liked Negative
Review
Upgrade for Dell Optiflex
330
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
VS
By Tom
from New Jersey
About Me Power user
PROS
Fast
Increases Speed
Large Capacity
Reliable
Performance
CONS
BEST USES
Increased
Performance
PRIMARY
USE:
Business
Comments about
Crucial 2GB 240-pin DIMM
DDR2 PC2-6400
:
The service was excellent as usual.
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
PROS
Delivery
Fast
Increases Speed
Large Capacity
Pricing
Reliable
Performance
CONS
BEST USES
Increased
Performance
Multiple
desktop
applications
PRIMARY
USE:
Business
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.
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
PROS
Fast
Increases Speed
Reliable
Performance
CONS
BEST USES
Gaming
Increased
Performance
Multimedia
5.0 10/3/2016
Perfect Service
5.0 9/28/2016
RAM works
Great!
5.0
9/27/2016
(0 of 1 customers found this review
helpful)
When we need computer
memory we buy Crucial for performance.
Wearetheservice
Wearetheservice
PRIMARY
USE:
Personal
Comments about
Crucial 2GB 240-pin DIMM
DDR2 PC2-6400
:
Great for getting the most out of Facebook and
Zynga games.
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
PROS
Fast
Increases Speed
Large Capacity
Reliable
Performance
CONS
BEST USES
Increased
Performance
PRIMARY
USE:
Personal
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?
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
PROS
Increases Speed
Reliable
Performance
CONS
BEST USES
Increased
Performance
Multiple
desktop
applications
PRIMARY Business
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.
5.0 9/23/2016
What can you
say about RAM?
5.0 9/23/2016
Compatible,
Reliable, Affordable.
USE:
BOTTOM LINE Yes, I would recommend this to
a friend
Was this review helpful? Yes / No - You may also flag
this review
By boddidog
from Talent, Oregon
About Me Casual User
PROS
Increases Speed
CONS
BEST USES
Multiple
desktop
applications
PRIMARY
USE:
Personal
Comments about
Crucial 2GB 240-pin DIMM
DDR2 PC2-6400
:
Easy to install, computer recognized it
immediately.
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
PROS
Fast
Increases Speed
Large Capacity
Reliable
Performance
CONS
Wrong Memory
For My Pc
BEST USES
PRIMARY
USE:
Personal
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.
BOTTOM LINE Yes, I would recommend this to
a friend
Was this review helpful? Yes / No - You may also flag
this review
5.0 9/23/2016
2GB memory
5.0
4/9/2016
(1 of 1 customers found this review
helpful)
Crucial system analyzer
gave me wrong answer.
By rim
from Albany, NY
About Me Casual User
PROS
Fast
Increases Speed
Large Capacity
Reliable
Performance
CONS
No Instructions
Included
BEST USES
Increased
Performance
PRIMARY
USE:
Personal
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.
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
PROS
Increases Speed
CONS
Difficult To
Install
BEST USES
Increased
Performance
Multimedia
Multiple
desktop
applications
PRIMARY
USE:
Personal
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.
BOTTOM LINE Yes, I would recommend this to
a friend
Was this review helpful? Yes / No - You may also flag
this review
5.0 4/2/2016
Completely met
my expectations
4.0 4/2/2016
some
compatibility issues
By Yo!
from IL
About Me Casual User
PROS
Increases Speed
CONS
BEST USES
Increased
Performance
PRIMARY
USE:
Personal
Comments about
Crucial 2GB 240-pin DIMM
DDR2 PC2-6400
:
It improved performance a little bit. For the
price its totally worth it.
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® by PowerReviews
4.8 (based on 425 reviews)
PROS
Reliable (274)
Fast (202)
Increases speed (196)
Easy to install (138)
Large capacity (96)
CONS
No instructions
included (13)
Difficult to install (7)
No increase in speed (7)
Easy to install (3)
BEST USES
Increased performance
(280)
Multiple desktop
applications (216)
Multimedia (119)
REVIEWER PROFILE: Power user (227), Casual user (187)
PRIMARY USE: Personal (345), Business (66)
Write a Review
97% of respondents would recommend this to a friend.
4.0 4/1/2016
Old Pc
Most Liked Positive
Review
No More Blue Screen of
Death!
In April of 2009 my brother-in-
law 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
Most Liked Negative
Review
Upgrade for Dell Optiflex
330
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
VS
Reviewed by 425 customers Sort by
Newest
Displaying reviews 1-10
Back to top
Previous |
Next »
By Tom
from New Jersey
About Me Power user
PROS
Fast
Increases Speed
Large Capacity
Reliable
Performance
CONS
BEST USES
Increased
Performance
PRIMARY
USE:
Business
Comments about
Crucial 2GB 240-pin DIMM
DDR2 PC2-6400
:
The service was excellent as usual.
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
PROS
Delivery
Fast
Increases Speed
Large Capacity
Pricing
Reliable
Performance
CONS
BEST USES
Increased
Performance
Multiple
desktop
applications
PRIMARY
USE:
Business
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.
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
PROS
CONS
BEST USES
5.0 10/3/2016
Perfect Service
5.0 9/28/2016
RAM works
Great!
5.0
9/27/2016
(0 of 1 customers found this review
helpful)
When we need computer
memory we buy Crucial for performance.
Fast
Increases Speed
Reliable
Performance
Wearetheservice
Gaming
Increased
Performance
Multimedia
Wearetheservice
PRIMARY
USE:
Personal
Comments about
Crucial 2GB 240-pin DIMM
DDR2 PC2-6400
:
Great for getting the most out of Facebook and
Zynga games.
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
PROS
Fast
Increases Speed
Large Capacity
Reliable
Performance
CONS
BEST USES
Increased
Performance
PRIMARY
USE:
Personal
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?
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
PROS
Increases Speed
Reliable
Performance
CONS
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
5.0 9/23/2016
What can you
say about RAM?
5.0 9/23/2016
Compatible,
Reliable, Affordable.
PRIMARY
USE:
Business
to make an older computer ready to run the
latest OS and software and handle professional
workloads all day everyday.
BOTTOM LINE Yes, I would recommend this to
a friend
Was this review helpful? Yes / No
- You may also flag
this review
By boddidog
from Talent, Oregon
About Me Casual User
PROS
Increases Speed
CONS
BEST USES
Multiple
desktop
applications
PRIMARY
USE:
Personal
Comments about
Crucial 2GB 240-pin DIMM
DDR2 PC2-6400
:
Easy to install, computer recognized it
immediately.
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
PROS
Fast
Increases Speed
Large Capacity
Reliable
Performance
CONS
Wrong Memory
For My Pc
BEST USES
PRIMARY
USE:
Personal
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.
BOTTOM LINE Yes, I would recommend this to
a friend
Was this review helpful? Yes / No
- You may also flag
5.0 9/23/2016
2GB memory
5.0
4/9/2016
(1 of 1 customers found this review
helpful)
Crucial system analyzer
gave me wrong answer.
this review
By rim
from Albany, NY
About Me Casual User
PROS
Fast
Increases Speed
Large Capacity
Reliable
Performance
CONS
No Instructions
Included
BEST USES
Increased
Performance
PRIMARY
USE:
Personal
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.
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
PROS
Increases Speed
CONS
Difficult To
Install
BEST USES
Increased
Performance
Multimedia
Multiple
desktop
applications
PRIMARY
USE:
Personal
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.
BOTTOM LINE Yes, I would recommend this to
a friend
5.0 4/2/2016
Completely met
my expectations
4.0 4/2/2016
some
compatibility issues
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1
Was this review helpful? Yes / No
- You may also flag
this review
By Yo!
from IL
About Me Casual User
PROS
Increases Speed
CONS
BEST USES
Increased
Performance
PRIMARY
USE:
Personal
Comments about
Crucial 2GB 240-pin DIMM
DDR2 PC2-6400
:
It improved performance a little bit. For the
price its totally worth it.
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 »
4.0 4/1/2016
Old Pc