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For Crucial 1GB DDR2 PC2-6400 (CT12864AA800) CL6, 845 customer reviews collected from 1 e-commerce sites, and the average score is 4.6.

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15.10.2014

Bought to upgrade my daughter's low spec HP Celeron Vista Home Premium PC from 2 x 500 Mb to to 2 x 1 Gb DIMMs.(Maximum allowed in two slots provided). Came quickly, worked perfectly.Decided to upgrade my Home/office spec HP XP Pro PC from 2 x 500 Mb to 4 x 1 Gb in four slots provided.Used Crucial scanner to determine exact DIMMs required. Couldn't find these on Amazon so ordered from Crucial direct.Same speed of delivery and delivery cost (zero) and price difference not worth worrying about.Ordered two 2 x 1GB upgrade kits.Installed, worked, but My Computer, Properties, General showed only 3 Gb memory.Before trying permutations of only two DIMMs to see if 2 Gb showed and thus eliminating any possibility of faulty DIMM (unlikely)I telephoned Crucial support.Having ascertained that I had 32 bit Win XP Pro , they explained that I had fallen into the 3 Gb switch trap. I leave you to research this, but (simplified) without making BIOS changes and worrying about video card memory overlap questions, the 32 bit version of XP limits RAM to 3 Gb.They explained I could get 3 Gb by using two of my new 1Gb DIMMs in the primary slots and putting my existing two 500 Mb DIMMs in the secondary slots.I said it was a pity then that the technical info on the PC had led me to buy twice as much memory as I needed.No problem they said, emailed me a returns code, I sent it back and they promptly (presumably after checking the memory) have refunded half my outlay.So, as other reviewers have said, "crucial to buy Crucial". It works and they know how to treat their customers.
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30.1.2014

OK , so I my OS is XP SP3 and my PC had 2GB of RAM. Even thougfh it has a dual core 3.2GHz processor, it was really sluggish, especially when I had a few tabs open in Internet Explorer. After a few mins the PC would grind right down to the point where I would have toi start shutting down programs just so it could keep going. One of the snags with XP 32 bit is that it can only deal with RAM up to 3GB,anthing more thanthat is simply not used. It might sound like a bit of a waste but at the good price of the additional 2GB from Crucial to take me up to 4GB with 1GB wasted, it was still definatley worth it.I have had Word, Excel, Access, Media Player, AutoCAD,plus a couiple of minor graphics programs and up to 7 active tabs in Internet Explorer all running at the same time and the PC barley falters. Ram has to be upgraded in matched pairs so I had top buy another 2GB to get best performance from the RAM upgrade. Crucial do a RAM checker to see what your Motherboard and exisitng RAM are to make sure you get the right RAM for an upgrade. THe Crucail web site says one price, while Amazon sell the same product from Crucail at a slighlty lower price. Use sopme common sense here where you buy it from. My order arrived after 3 working days. Packaging was not good but it survived and worked fine out-of-the-box.My bottom line line here is that my RAM upgrade WAS worthwhile (even if 1GB appears to be wasted) and my PC is performing better for it.
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2.8.2012

I use Autocad, Picasa, Photoshop, Google Chrome, Google Earth, and Adobe Acrobat with multiple PDFs and web browsers open while I work.Autocad 1GB + Photoshop 1GB + Chrome 1 GB + Picasa 1 GB + multiple PDFs 1 GB = 5 GBMy computer is a $1200 HP from Costco that I bought two years ago. It came with 4 GB of memory but when I run all my applications, they take up about 5 GB of RAM. When you max out your RAM the computer is uselessly slow and it could take up to 40 seconds for a new program to open, especially a program that uses up a lot of RAM like Autocad 2012 or Adobe Photoshop. It is very frustrating using Autocad when you have to wait a few seconds for each little command.Those few seconds of waiting add a lot of stress to your life.But now that I upgraded my computer to 8 GB of RAM my computer runs like a champ! I can use all my programs simultaneously with dual 24" monitors, and there is no lag. If you work in an office and do a lot of multi tasking like Microsoft Excel and Word, with multiple PDFs and Pictures and photo editing, and AUTOCAD, then it is worth every penny. Amazing Value! But I'm sure in about two years all the programs are going to be bigger and take up more RAM and I'll need 16 GB but at that point I'll buy a new computer. That's my routine. Buy $1200 desktop from Costco wait two years, then buy upgrade Ram from Amazon, use computer for two more years, then buy a new one.
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29.9.2012

I bought this for my husband as it matched the specific requirements as per Dell.Slotted in. Worked 1st time. Machine had virtually ceased up as it was shipped with 512K which once all the patches and virus software went in meant there was virtually no way it would run and when he switched the performance on the system to give priority to the System Cache, it failed altogether and couldn't even boot.I wont mention the Supplier of the Dell secondhand machine as this is not about them, but when it would not boot up, they told him it only had 30 days warranted and not only refused to help but lied about the problem to try and sell him new XP software and told him the machine had become infectedby a trojan/virus and buying another copy of XP was the only way to solve it.My husband who has worked in IT since before Microsoft then took out the USB plugins to reduce memory usage, managed to get to basic start-up and reversed the performance changes which then booted up the machine again.The Crucial Memory upgrade just solved the problem straight away once we had upgraded and we now have a good system and that is no thanks to those crooks who sold us the machine.
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3.12.2010

I was advised to get Crucial memory as the brand for my slow and snuffly 5 yr old Dell PC. The Crucial website does a search of your computer to clearly identify what you have and what you need in order to get the right memory configuration to take your PC to full speedy perfection. Or you can work this out yourself by using make and model search. AND they guarantee that what they suggest WILL work. Very encouraging to the techno klutzyBrilliant speed of despatch (I went straight to Crucial rather than the middleman). And Crucial had a good deal as well. Same day despatch, next day delivery. Videos on their site also show you how to do it. Easy,even for a novice.But oh boy DON'T you have to apply pressure (they suggest 20-30lbs of pressure) my sore little fingers winced till I thought to find something to use - the stem of a plastic magnifying glass, since you askI assume this is nothing to do with Crucial mems, more to do with the PCs own housing.Anyway - my PC feels like an Arab steed, yearning to be put through its paces. The old carthorse plodding disconsolately around the field has GONE!
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28.6.2014

I wanted to upgrade the memory on an old Dell PC from 2 to 4Gb. I chose Crucial because experience has taught me that the Crucial product is 100% compatible with my particular model. I put the two modules in and the upgrade worked perfectly.My object in performing this uprade was to reduce the number of BSODs that I was having with Windows 7. This has been achieved.A point to remember. If you are using a 32bit version of Windows then it will be unable to see the full 4Gb of RAM. This is because the address space that a 32bit Winsows system can address tops out just over 3Gb. If you are not in a position to upgrade to a 64bit version of Windows you might want to purchase the alternative 1Gbupgrade that Crcuial supply.If you are running a 32 bit system and have an original Windows install disc then you can usually upgrade to a 64bit version of Windows. That will allow your sytem to address all the extra memory BUT be aware that this involves major work on your C: drive. If you do this you will need to act to protect your data and be prepared to reinstall applications.
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18.12.2009

Very nice. I replaced the 2 256MB cards I had in my Dell Dimension E310 with 2 of these 1 GB modules and have noticed a great difference.It used to take several seconds for sub-menus to open on the Start menu, now they open immediately. The whole system feels smoother and cleaner. I wish I had done this upgrade sooner.Installing them was easy. Someone wrote it took incredible pressure to snap them in.I suppose it took some extra pressure, but it wasn't a big deal. Using both hands to grasp the card by its sides, I dropped the card in place. The first 'snap' seated it in the slot, but wasn't enough to lock the clips. I positioned myself directly over the top of the card,using my thumb I applied downward pressure on one end, then the other. Click,click both ends were secured by the clips and the memory was recognized on the first try.Highly recommend this RAM, especially if windows and menus are sluggish.
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9.4.2010

Definitely worth the buy for every little penny invested into it and I have put a lot of research before I bought these RAM cards, I put the RAM cards on my HP Pavilion m7463w PC to fill it up from 2GB XP Media Center PC (factory model) then upgraded to Windows 7 then went 4GB to fully take advantage of the Aero effects which I loved. I'd used to turn them off Areo, because my PC needed the performance on my everyday multi-tasking stuff (IM'ing, Web-surfing, Game playing, music and sometimes all at the same time, lol). I noticed that as soon as I turned on the PC, programs and applications start almost immediate as soon as it opens. Worth every penny and I am not disappointed, not even a bit.You are getting the one of the best memory manufacturers in the market. 5 Stars! =DEDIT: Owned these RAM cards for like over a month and I just love them!
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6.6.2008

I ordered this because I was having file corruption issues and during the fix the tech told me my machine was running way too slow - a virtually new Dell running Vista with 1GB RAM. Supposedly Vista only requires 512MB but the tech laughed and said it eats 1GB routinely. So I ordered up the 2GB Crucial chipset. They slid right in, the computer recognized them, and we were off to the races. Much, much better. Web pages fill 3x faster, multitasking programs snap back and forth with authority and (I swear) I lost a couple of extra pounds and some of my hair grew back in. Amazing. It still takes too long to boot Vista, but throwing another 2 gigs at Vista is like hooking up 2 more tugboats to the Titanic.It helps, but not much. Not a total fix, but much recommended.
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11.6.2012

Having researched exactly which RAM was suitable for my old Compaq PC on Crucial's own website (which was very simple to do,simply type in your PC model number into their search engine and it will tell you which of the thousands of RAM upgrades will work with your particular PC) I found this specific piece of kit on Amazon. It is very easy to fit/install even for someone like me who had never even opened up a PC before. It hasn't resolved all the problems I had been having with my old PC which is about 5 years old now, but has made a marked and instant improvement in it's performance. Have since installed Windows 7 to replace the awful Windows Vista and this has further improved performance.Delivery was prompt as is usual with Amazon.
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14.6.2010

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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26.7.2013

My neighbour asked me to look at his PC which was running a bit slow. Apart from lots of background programs, it was only running 1GB RAM, which really isn't enough for Windows 7. This memory was the answer. Crucial are a quality brand that I've used before, and if you've got a slightly older PC it could probably do with a bit more RAM. Easy to fit, up and running in less than 5 minutes.I would have given 5 stars, but in between putting this on a wishlist and ordering it the price went up by almost 50%!!! I see that it's come down again (not all the way!) to £11.84 which is still very good value. At the price I paid (£15.54) not so great. But hey, happy neighbour,what goes around comes around etc!!
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8.2.2011

The product came on time and came with clear instructions for those who might need them. The installation was a dream the only thing I had to do in the whole process was place the RAM inside my motherboard everything else happened on its own. The difference in speed was noticeable straight away and my computer has gone from unbearably laggy to smooth:)! One piece of advice when checking compatibility with your computer (if the motherboard hasn't been replaced since you bought it) would be to visit crucial's own website, [...] first for it will be able to tell you what is compatible if you fill in the drop down menus of what manufacturer and model etc.Great product hope this helps.

30.10.2009

So far, I never had any problem with crucial ram. I install this memory inside a Dell Precision 380 and it has been running great. I had some installation problem installing both modules at first because my system was using a old bios. Once I update my bios the ram installed without any problems. My computer now run faster since the ram upgrade.Just a Reminder: If you are planning to install this ram on a 32bit Windows OS then you need to remember that Windows will not recognize the entire 4 gigs. My Windows 7 32bit system only recognize 3.25 gigs of the ram. If you are installing this ram on a 64bit Window OS, then you are fine. This a Windows limitation not a Crucial problem.

9.8.2010

Crucial Technology CT12864AA800 1 GB 240-pin DIMM DDR2 PC2-6400 CL=6 Unbuffered NON-ECC DDR2-800 1.8V 128Meg x 64 Memory has been a wonderful addition to my already good memory in my Dell Inspiron 530. It seems to be very fast in response time. 4 GB of these bad boys and you will know you have great quality. I reccommend any time you plan on purchasing one of these..It would be better to purchase two of them at one time instead of buying and replacing only one of these. It seems to perfom better that way. Although I didn't notice any instability problems running only one if you absolutely cannot afford two of them at one time.

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