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Intel D945GCLF memory question

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  • Intel D945GCLF memory question

    I recently upgraded my carpc from the D201GLY and also upgraded my RAM from 512MB to 1GB. Everything is working fine except during boot. I'm getting BIOS beeps that are telling me something is wrong with my video memory. I'm stumped. It uses shared memory. So I wrote to Intel to ask them about it and they said to make sure the RAM module is on the tested memory list. It isn't.

    My question is, even though everything else about the memory matches the motherboad (DDR2, SDRAM, PC2 6400) can the memory be incompatible? When purchasing memory for a motherboard, is it common to have the check the manufactures website to see what works? Or is this something new?
    03 Accord Sedan CarPC

  • #2
    It's nothing new, memory incompatibilities have existed for a long time. Generally I try and buy low density memory as it's more compatible than high density memory. Since Intel lists memory that is known to work -- I only purchase those to avoid unforeseeable headaches.


    • #3
      I guess I'm showing how new I am to building computers, huh? What's the difference between high-density and low-density?
      03 Accord Sedan CarPC


      • #4

        Many only consider SPEED when purchasing memory and often neglect an important fact that memory DENSITY is actually even more important!

        So why memory DENSITY is so important? Is it related to your system when upgrading? The answer is YES!

        If your system is designed for accepting DDR (Double Data Rate) memories of 184pin DIMM (usually desktops) or 200pin SODIMM (usually laptops) built, for your system to fully recognise 1GB capacity per memory slot, you need to use 'Low Density - 64Mx8 config' 1GB module. If you use 'High-Density - 128Mx4 config' 1GB module, your PC may only recognise it as HALF the size at 512MB or most of the time it will not work.
        How to tell if your 1GB module is a low or high density module?

        * All low density 1GB modules are made with 16 chips (8 chips on each side) using 64Mx8 device.
        * All high density 1GB modules are made with 16 chips (8 chips on each side) using 128Mx4 device.

        It costs memory manufacturers almost the same to produce Low Density 1GB modules which have 100% compatibility with all systems on the market, comparing to producing high density 1GB modules. So why would manufacturers be so foolish to produce high density 1GB modules which only have 10% compatibility with systems on the market? The reason is simple, because high density 1GB modules are mainly manufacturing process rejects/seconds that cannot be made as a low density modules. It is very much like Intel CPU, those CPU that cannot be made as Pentium 4 CPU become a slower bus Celeron CPU instead, by a down-binning process.
        High Density module is by far much slower than Low Density module at same speed rating say PC3200/DDR400. A lot of users have fallen into attractive CHEAP PRICE trap by High Density module sellers and have complained that they are either VERY SLOW and/or will not run at all and sellers won't accept return!
        High density modules are FAR CHEAPER, less than half the price when compare with low density modules and hence high density modules will NOT work on 90% of today's PC chipsets that require and can only use 'Low Density - 64Mx8 config' 1GB modules.
        In summary:-

        * LOW DENSITY modules have 100% compatibility with ALL systems and ALL chipsets.
        * HIGH DENSITY modules only have 10% compatibility and are VERY SLOW.

        This is also why almost all Branded-Name systems such as Apple/MAC, Compaq/HP, Dell and IBM only uses LOW DENSITY modules.
        However 90% of eBay are plagued with High-Density 1GB modules at very low price, and you will be wasting your precious time and money having to return those high density 1GB modules to your seller for refund. So AVOID those 'High-Density - 128Mx4 config' 1GB modules which is usually UNBRANDED and is NO NAME!


        • #5
          memory is cheap enough these days i always skipp the internet and go to my local puter shop for what i need, there experience always seems to help out

          1993 Mitsubishi Verada

          My Ride


          • #6
            That's what I was going to do. But the shops around here are real expensive when it comes to memory. Like, 7 or 8 times more.
            03 Accord Sedan CarPC


            • #7
              Well, I just got my replacement memory in the mail today. The model number is off of Intel's tested memory list and the beeps are still there. I'm at a loss for solutions now.
              03 Accord Sedan CarPC


              • #8
                I would have first counted the number of beeps and look up the corresponding error code to determine what to do next.


                • #9
                  8 Beeps, which had something to do with video memory. This is why I changed the RAM. Intel said since it wasn't on the list it was likely to be the problem. Here it is straight off the site:
                  You are getting 8 beeps indicating display memory read/write failure

                  * Make sure that you have a video card on your system.
                  * If possible, swap the memory on the video card.
                  * Try a different video card.
                  * Try a different desktop board.

                  Should I write intel and request another board?
                  03 Accord Sedan CarPC


                  • #10
                    Well if you have no PCI video card to try out then that's all you have left to try out (swapping another motherboard).


                    • #11
                      I guess I'll give them a call on Monday.
                      03 Accord Sedan CarPC