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Thread: DDR Ram compatibility




  1. #1
    Join Date
    Apr 2003
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    17

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    Hey my friend just baught a pc from dell.com. It has not arrived yet, but it's on its way. I saw the specs after he pruchased it, and I noticed he only got it with 128mb's of PC2700 ram(333mhz). It's a P4 2.4 at 533fsb. Anyways the dell's webstie says the ram will operate at 266mhz, if it wasnt for the 533 fsb, (but thats irrelevant I think). My feelings are that he should at least have 256mb. He will be running XP, and plans on doing alittle gaming, but for the most part not much at all. According to the specs, the board only has 2 DIMM slots. My question is: is all ddr pc2700 compatible. Could we install any other type 128mb of pc2700 in his mobo, to make a combined total of 256? If not, will I need to take a look at the ram dell uses, and purchase that exact ram? And once we do get it installed how do I go about the mobo reconizing it. I have never played with DDR, only RDRAM, and old SDRAM, im not sure if it's tricky, or if it's just "plug and play". Anyways I totally appreciate the help, and suggestions. Thanks alot.

  2. #2
    Join Date
    Apr 2003
    Posts
    114

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    Some motherboards are pickier than others. Iím afraid thereís no pat answer to your question. Iíve no experience with Dellís so couldnít say for sure if they have to be the same brand. You do want to try and get another stick with the same timings RAS, RCD, RP and CAS. Usually shown in numbers like 6-2-2-2, 7-3-3-2.5 ect. Youíll have a better chance of them being compatible that way. Plus itís better for performance. If the owners manual or the ďFor lack of a better word.Ē BIOS donít give you the ram timings there are programs that will. Sandra use to give them to me on my old board. Generally nothing extra is needed when you add ram but check the ownerís manual to be sure. You never know. You might have to change a jumper but I doubt it. Hope this helps some.
    [size=1.5]AMD 2100+ | Epox 8RDA+
    2x256KHX3000 | AreoFlow TMD
    Antec SmartBlue 350watt | 2 TT80mm case fans | WD 120gig
    Maxtor 60gig | FIC 9800pro | Apex Thermally enhanced case [/size]

  3. #3
    Join Date
    Apr 2003
    Posts
    17

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    Hey also I was wondering, can you run a 128 stick, and a 256 stick on the same mobo. It's Samsung ddr333, im not sure of the timings yet.
    P4 2.4B, 1024 PC800 RdRAM,
    Sheety Video Card (mx420),
    Not enough power supply,
    probly runs hot,
    to broke to buy a DVD-rom, 40x10x40x cdrw
    80gig HD (probly 2mb cache)
    Brought to me all from Dell.
    (I'll build my next one)

  4. #4
    Join Date
    Apr 2003
    Posts
    114

    Default

    You can try it. Iíve done it on most of the boards Iíve owned. Also even if there not the same timings they still might work. Theyíll just run at the timings of the slower chip.
    [size=1.5]AMD 2100+ | Epox 8RDA+
    2x256KHX3000 | AreoFlow TMD
    Antec SmartBlue 350watt | 2 TT80mm case fans | WD 120gig
    Maxtor 60gig | FIC 9800pro | Apex Thermally enhanced case [/size]

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