Download your favorite Linux distribution at LQ ISO.
Go Back > Forums > Linux Forums > Linux - Hardware
User Name
Linux - Hardware This forum is for Hardware issues.
Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux?


  Search this Thread
Old 01-02-2005, 07:55 PM   #1
Registered: Jul 2003
Location: Chicago
Distribution: Ubuntu
Posts: 124

Rep: Reputation: 15
Talking shibby! successful Gentoo RAM upgrade + one quick question!

Microcenter has a kickass sale, and so I've just upgraded from 512kb to 1024 kb RAM on my Gentoo box, and DAMN IT'S FAST! Apps. load much more quickly. It's true what they say about ne'er having enuf ram.

But now, I have two DIMM channels, and only occupying 2/4 slots-- Channel A[slots 1+2] and Channel B[slots 1+2]...

Two empty slots, (being that there is 512kb of pc3200 DDR ram in Channel A1 and channel B1, respectively).

So, I have that pre-existing 512kb of pc2100 leftover, which doesn't seem to work... when I plug it in BIOS complains about asymmetric rambus configuration (I'm paraphrasing) i.e., you can't have 1.5kb of RAM on my Intel PERL 865 mobo, only whole numbers. ("But if that's the case why, then, will it allow let you have one chip with 512kb, which is not a whole number?" I wonder.)

My Question: I don't want to have a do-nothing 512kb pc2100 chip lying around. So if I wanted to do a further upgrade, say to 2GB of RAM, should I want to buy another 512kb of pc2100 to match the remnant 512kb chip (can you mix and match 3200s with other numbers?), or must I buy more pc3200 (do I need to remain consistent and have all four RAM chips at pc3200?) AND can I possibly get by somehow with putting that third 512kb one of the remaining slots, WITHOUT buying the fourth chip?

Thanks much!

Old 01-02-2005, 09:13 PM   #2
LQ Veteran
Registered: Mar 2003
Location: Boise, ID
Distribution: Mint
Posts: 6,642

Rep: Reputation: 85
Just like a chain is only as strong as its weakest link, RAM can only work as fast as its slowest module. If you mix and match 2100 and 3200 RAM, your effective speed will be 2100, not 3200 or something in between. To illustrate, suppose that a given task required 2 work units to complete, and magically, half the task was given to the 2100 module and the other half was given to the 3200. Now, even though the 3200 will finish its half before the 2100, the task itself will not be complete until both halves finish - ie, it will be done when the 2100 is finished, and thus your effective speed will never exceed the slowest module.

Anyway, although I understand that you don't want to leave the 2100 module sitting around unused, I would suggest only installing similar sticks of RAM into the box (ideally, I would suggest using identical sticks - same manufacturer, same model). If you plan to double up the RAM again, go with matching 3200. As for the 2100, if you're anything like me over a year or two you will accumulate misc odds and ends, and can pretty much build a "new" PC out of the various spare parts that you've collected, so you might want to just hold onto it. Alternatively, you may be able to trade it to a friend for something else and/or there's always Ebay. Good luck with it either way and congrats on the successful upgrade -- J.W.
Old 01-02-2005, 10:32 PM   #3
Registered: Jul 2003
Location: Chicago
Distribution: Ubuntu
Posts: 124

Original Poster
Rep: Reputation: 15
Thanks! Now I understand it (a little) better. Seriously, though, that's cool and I'll definitely be sticking with the 3200--which should be getting cheaper sometime in the future. And that old stuff will definitely not go to waste!

Thanks, again.



Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
ram upgrade question.. ultimatenoob Linux - Hardware 4 07-21-2005 06:08 PM
Slackware and Gentoo only detect 1GB out of 3.5GB of RAM DiscoGranny Linux - Newbie 6 06-25-2005 02:34 PM
Gentoo Install: Quick Questions revenge80200 Linux - General 4 02-22-2005 08:01 AM
RAM Upgrade GML3G0 Linux - Hardware 3 09-30-2004 09:50 PM
ram upgrade freychef Linux - General 2 01-06-2004 04:54 PM > Forums > Linux Forums > Linux - Hardware

All times are GMT -5. The time now is 03:16 PM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration