new 1 Gig DDR2 Dimm memory
Hi
My motherboard is ASUS P5LD2-VM, Celeron 3.04Ghz and 512 RAM Debian Sarge - Kernel 2.4 and Slackware 10.2 Kernel 2.6 Yesterday I bought another 1Gig ddr2 dimm memory (as instructed in the motherboard's manual) To be honest with you, I can't see any difference How can I check if this new memory is recognised by the system? Obviously, some part of the memory will be taken by graphics (on board-card), I also have swap space When I issued the command: free -m I couldn't understand it, I mean my ram is 'physical memory' which was something like 889MB. It doesn't make sense. It should be sth like 1350- 1500 MB. On my motherboard there are two channels. each channel has 2 ddr2 dimm sockets. I added the new memory to the same socket as the old 512MB, then I put it to the other channel, doesn't make any difference. I know that Celeron is not one of the fastest processors, but I expected everything to run visibly faster with 1.5Gb ram. So to sum up: 1.how can I check whether the two memory modules (512+1024) are recognised and utilised by the system) 2.Where is the best place to put the second module (channel A - so togheter with the old memory or Channel B )The memory modules are not of the same vendor) 3. How else can I tune the performance of the computer Thank you |
No doubt your memory is fine but you must enable HIGHMEM(greater than 4GB) in your kernel. Once you do that, you should reboot and you will see the extra memory.And yes, 1GB more of Ram should speed things up quite a bit!!
Cheers! <<Samoth>> |
thanks, how can I do it in Debian or Slacware?
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sycamorex
I am a little unclear about something. How many dimms do you have installed. If you have 1 512 and 1 1g, that will explain your problem. Generally you have to add dimms in sized pairs in order to see memory speed increases. 2 512 dimms will run faster than 1 1gb dimm. Mixing memory sizes in a channel or not saturating a channel (less than 2 dimms per channel) will lead to slow downs. These are all hardware issues and they will apply no matter what os you are running. Linux handles memory much better than windows. If your are running only 2 or 3 "normal" programs you will not see much improvement in speed by going over 512. If you are using memory intensive programs (gimp) or more than 3 programs you will see some improvement. With a lot of systems today the limiting factor is hard drive transfer speed rather than cpu (excluding cpu intensive tasks like video conversion). Look at the manpages of hardparm. It gives a description of how to test drive speeds. Good Luck Lazlow |
thanks guys,
Yes I have 512 + 1024 - does that mean that the best option for me is to buy another 512 to have 512+512 in one channel and 1024 in the second channel, or to buy another 1024 and have 1024 in each channel (and get rid of 512)? thanks |
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1. I burn the bootable cd and boot the computer with 2 memory sticks in ONE channel and check if they can work together. 2. Then if I don't get errors, I guess it's ok 3. If I do get errors, shall I put each memory stick in a different channel and do the same test, or leave the memory sticks in one channel and go to Bios to check the numbers? 4. Sorry, but I have never had anything to do with expanding my memory. What exactly shall check in BIOS? First I set to SPD option and write down the numbers that will appear. (I am at work now so I can't check it now) 5. Quote:
Sorry, I am still a newbie thanks for help and patience |
First of all is both the RAM of the same speed, u cant have one running at 333 Mz and another at 400 Mz
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Hi all
I put both memory sticks in one channel and ran memtest86 for around 5 hours:) - 12 passes, 0 errors So what am I supposed to do next? I don't know if they run at the same frequency, the following info is written on the labels (on the memory sticks) 512mb memory: Elixir M2U51264TU88AOB-3C 512MB 1Rx8 PC2-5300U-555-12-AI 0540M205A0400C A10080-1.XX.CN and 1Gb stick: NCP NC00735 DDR1GB PC2 4300 thanks |
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thanks, now I need to read about recompiling the kernel
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