Question about Dell OPTIPLEX GX240 P4 1.7GHz 256MB 20GB DESKTOP (PCP417DELL)

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Can PC100 be substituted for PC133?

I have an old GX240 and I'd like to upgrade its ram, but the PC133, along with being very expensive, is hard to find. I don't want to invest any more than I have to on this machine. I've polled my friends on this, and they're split on whether or not I can do this. Any help on this is much appreciated. Thanks-

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Every configurator i have looked at says it will accept PC133 (up to 2 512MB sticks)

see for example:

http://www.ec.kingston.com/ecom/configurator_new/modelsinfo.asp?SysID=11212&mfr=Dell&model=OptiPlex+GX240&root=us&LinkBack=http%3A%2F%2Fwww.kingston.com&Sys=11212-Dell-OptiPlex+GX240&distributor=0&submit1=Search

Posted on Feb 04, 2009

  • Ron
    Ron Feb 04, 2009

    Ofcourse, watch out you do not spend more on the RAM than a refurbished computer with that RAM in it costs

    Check local stores and websites likehttp://www.tigerdirect.com/applications/...


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No they are not interchangeable normally. If by some chance your motherboard supports both then if you mix them the faster chip will run at the speed of the slower chip. You might be able to find PC 133 at kingston.com, or crucial.com. They will tell you exactly what RAM is compatible for your system if you use their memory finder tool. Hope this helps & please rate this solution fixya. Thanks.

Posted on Feb 04, 2009

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3 Answers

Need to increase ram but don't know how to find out how much board to support or what type.


Accessories included: i/o shield and cables only- no manuals or cdDFI CM33-TL/G Socket 370 Motherboard Intel Pentium III/ Celeron Onboard Video Audio IDE 3 PCI Micro ATX Motherboard Used Retail-MFG DFI Part:CM33-TL/G
2 DIMM sockets
Supports up to 1GB unbuffered DIMMs
Supports PC100 and PC133 SDRAMs BIOS
2 DIMM sockets
Supports up to 1GB unbuffered DIMMs
Supports PC100 and PC133 SDRAMs BIOS 2 DIMM sockets
Supports up to 1GB unbuffered DIMMs
Supports PC100 and PC133 SDRAMs BIOS 2 DIMM Sockets
Supports up to 1 GB of unbuffered dimms
supports Pc 100 and Pc 133 SDrams

Apr 04, 2011 | DFI CM33-TL mATX VIA 8601T/686B...

1 Answer

Types of sdram


PC66 SDRAM
PC66 SDRAM is the original module speed of SDRAM. PC66 SDRAM was the earliest version of SDRAM and therefore came in a number of smaller megabyte sizes than later versions. Most early motherboards were rated for PC66 SDRAM. The available sizes are 32MB (megabytes), 64MB and 128MB.
PC100 SDRAM


PC100 SDRAM was released after PC66 SDRAM and runs at a higher speed. It has the same number of pins as the earlier memory module and is capable of utilizing the same RAM slot. The only difference when installing this SDRAM in compatible computers with older systems (PC66 slots) is that the SDRAM will run at a slower speed. PC100 RAM comes in sizes such as 32MB, 64MB, 128MB, 256MB and 512MB.
PC133 SDRAM

The last generation of SDRAM is PC133. The PC133 memory provided a speed upgrade and comes in larger sizes than previous generations of SDRAM. PC133 modules are backward compatible with older SDRAM slots. The PC133 memory, however, will be forced to run at the slot's slower bus speed (PC66 or PC100). The memory comes in sizes like 128MB, 256MB, 512MB and 1024MB.


Mar 03, 2011 | Computers & Internet

1 Answer

I need to upgrade the ram in my Ms-6312 ver1 motherboard i need to know what the best ram and what will work i need atleast 2 gb


I have the same board. You can only install 256MB of PC100 RAM in each slot, for a total of 512MB. PC133 RAM will work as well, but it will run at PC100 speed.

Feb 25, 2010 | Gateway MS-6312 (4000785) Motherboard

3 Answers

My dot station has PC100 64mb RAM. Will it Support PC133 256mb RAM


hi normally if your system came with 100mhz ram that is all it will take as this has been specifically designed for that mhz of ram so i do not think that the 133mhz ram will work, all tho it is cheap enough to buy now, it might be worth giving it a try you will not damage anything doing so, but i think you will find that it will not work....hope this helps

Feb 22, 2010 | Intel Dot Station (INTC300AIO) PC Desktop

2 Answers

IBM ThinkPad T22 Series (Type 2647) memory upgrade


Hold on a second.. I have fixed a number of T21's and I recall that these units are super anal about the type of RAM they use. I am pretty sure that they require PC100 and will not accept PC133.

One second.... Ok, I just opened up my T21 and it has FRU 20l0255 which is PC 100. Here is a link to the specs. I have tried using PC133 and the same think happens - just does not boot. Nothing.

May 16, 2009 | IBM ThinkPad T22 2647 Notebook

1 Answer

Can work Memory SDRam 128MB PC100 with SDRam 512 MB PC133


It wont work, it will hang ur system. Ur motherboard supports but using Mutli-frequencies RAM is not possible, either u use SDRAM 512 BM PC133 or ur 64/128 PC100 RAM, You cant use all together.

Apr 20, 2009 | QDI Group QDI Advance 10T Motherboard

2 Answers

Laptop doesn't recognize new ram


I would guess that you need PC 133. Some manufactures that were using SDram at the time required PC133 while others would require but allow you to use PC100.

This is the requirement for your laptop from www.crucial.com

Each memory slot can hold SDRAM, PC133 with a maximum of 256MB per slot.*

Hope this helps

Apr 09, 2009 | Gateway Computers & Internet

1 Answer

Memory upgrade


First step : Make sure the memory you purchased meets the following specifications

"168pin PC133 SDRAM DIMM" which should be easily accessible from wherever you bought it.

If not, then you can find memory here. that the company guarentee's will work with your system. Also - You want to make sure the memory that was in your system to begin with is identical to the memory you are sticking in it to get it to 512MB Systems that are this old with "PC133 SDRAM" are very picky about what kind of ram you stick in them. Make sure wherever you purchase your memory from, has a guarentee that it will work in the make/model of your computer.

Mar 14, 2009 | Compaq Presario 5000 PC Desktop

2 Answers

IBM ThinkPad T22 Series (Type 2647)


Since this is an older machine, the performance can't be boosted very much. The maximum performance you can get from this machine is 1ghz processor, with 512mb RAM. The 1ghz processor is the biggest processor that is compatible, and unfortunately, the system is base on a 100mhz frequency rating, so PC100 memory is the only compatible memory available. The maximum chip size in PC100 is 256mb, they just don't make them any bigger, so 2x256mb=512mb RAM. As far as the hard drive, it is an IDE drive, and you can get an IDE drive up to 120gb. These are very good and durable machines, just slow, so if you can deal with the lower level of performance, this machine will last years. Also, these are upgradeable to XP pro, but not Vista.

Sep 04, 2008 | IBM ThinkPad T22 2647 Notebook

1 Answer

Speed of ram to buy


if its just sdram, then pc133 is the fastest speed as its single data ram or you can fit pc100 although these are both hard to come by and expensive. The max amount of memory you can use is 1GB See below

Sep 07, 2007 | EliteGroup K7SEM Motherboard

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