Memory Upgrade Help?

July 10, 2009 at 17:53:16
Specs: Windows XP
hoping someone might be able to help me with a memory upgrade issue. i had 2 x pc2100 512mb ddr sticks in my

system and am trying to upgrade to 2 x pc3200 1024mb ddr sticks. according to my motherboard specs, i'm limited to

2gb of memory.

when i popped in the new 2 x 1024mb sticks my system became unstable and crashed, again and again. i've tried

reseating the stcks and i've also flipped slots - no difference. i've finally replaced one of the 1024mb sticks

with one of my old 512mb sticks (for a 1 x pc3200 1024mb, 1 x pc2100 512mb combo) and my system is once again

stable although i don't notice any increase in speed.

so do i have to mess with the bios or other settings to get my 2 x 1024mb sticks to work together? any help would

be very much appreciated.

system specs:
board: ecs p4s5mg/gl+, sis 650 chipset
processor: p4 1.8

bios setup - advance settings:
l2 cache - enabled
system bios cacheable - enabled
share memory size - n/a (gray)
graphic win size - 64mb
dram cash # latency - 2.5t
timing setting mode - normal
ma 1t/2t select - ma2t
advanced read prefetch - enabled
host to memory latency - normal

bios setup - pnp setup:
cpu type - intel p4 (gray)
cpu/dram speed - 100/100mhz **
cpu core voltage - 1.456v (gray)
cpu ratio - locked
cpu frequency - 100mhz (gray)
dram frequency - 100mhz (gray)

** available options: 100/133mhz, 133/133mhz, 100/100mhz

processor frequency - 1972.72mhz (initial 1800mhz)
fsb frequency - 96.6mhz (initial 100mhz)
bus speed - 398.4mhz
multiplier - 18x (initial 18x)

ddr-sdram pc1900 (118mhz)
timings 2.5-3-.-6 (cl-rcd-rp-ras)

ddr-sdram pc3200 @ 200mhz 2.5-3-3-8 - 1024mb
ddr-sdram pc3200 @ 200mhz 2.5-3-3-8 - 1024mb

gpu frequency 258.75mhz (initial 260mhz)
memory gpu 180.00mhz (initial 180mhz)

processor temp - 35c
mainboard temp - 38c
processor fan speed - 2812rpm

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July 10, 2009 at 19:05:08
Check the link.

You need more help with this than I can provide.

There is nothing to learn from someone who already agrees with you.

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July 11, 2009 at 12:04:35
Here is a link to ECS that shows the type of RAM you can install.

On the same page is a DL for the mobo manual.

I believe you are installing the wrong modules. You will note on the spec sheet that you can install DDR333/266.

DDR333 is a module PC-2700; DDR266 is a module PC-2100
The PC-3200 that you are trying to install is DDR400 - not listed as compatible.


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July 11, 2009 at 22:56:52
monk - thanks very much for cutting through all of the specs and delivering a clear, simple answer! the thing is, crucial and other memory compatible website tests show that my board can use pc3200 memory even though it seems pretty clear from the manufacturer's link you provided that it can only handle up to pc2700 (ddr333). am i right to conclude that here is no such animal as pc3200 ddr333, that all pc3200 memory is ddr400? again monk, thanks a ton!

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Related Solutions

July 12, 2009 at 15:20:25
I am afraid that you are spot on, Kaimanu01. Here is a Wiki link that has a short article about DDR SDRAM:

Here is a link to Directron showing their DDR333 RAM:

Here is a link to Crucial showing all of their DDR333 RAM:

As you can see, it's all PC-2700. The problem is that with RAM, there are so many different and confusing names that it's hard to sort through it all; it is for me at least and after I buy it, I keep my fingers crossed just in case!


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July 12, 2009 at 18:26:14
I believe DDR400 is backwards compatible and can run as DDR333 or DDR266.
What you need to do is go into the BIOS and manually configure (downclock) the DDR400 ram to run as 333 or 266 and see if the system becomes stable.


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