Random Reboots with dual channel

Hi,
I just bought yesterday the following system.
Intel P4 2.8 Northwood HP enabled
MSI 865PE/Neo 2 Platinum Edition
Maxtor Diamond Star 9 200 GB 8MB Cache 7200rpm
Elixir 2x512MB DDR 400 CL3
Toshiba DVD 16x
Creative Geforce 4 Ti 4400 128MB
Logitech Cordless Keyboard connected and a logitech cordless optical mouse
19 inch belinea monitor.
The power supply is a no name product LPK2-30 with the following specs.
420W
3.3V 28A
+5V 36A
-5V 0.5A
+12V 17A
-12V -0.8A
It says that is P4 ready, i know which does mean nothing
Operating System:
Windows XP Professional SP1
All Hotfixes and Updates applied
Newest drivers for all the system parts
The errors during the windows crashes are irq not less or equal or page fault, which looks for me pretty much like a problem with the memory.
Ok what i tried so far.
Single channel with 512MB works fine.
Single channel with 1GB works fine except one strange thing restarting the machine and it got stuck during the bios loading worked fine after i pressed reset.
Dual channel 1/3 1 GB get random reboots.
Dual channel 2/4 1 GB even worse but i think at this point my newly installed died.
I tried to set memory voltage from 2.65 up to 2.8 but did not change the behaviour.
memtest with one modules in slot 1 no errors
memtest with dual channel 1/3 1 gb no errors running 30 minutes
i will try now a memtest with the second single module in memslot 3.
No MAT or dot ram settings are 3,3,3.
I am bit running out of ideasö
before i forget i updated the bios from 3.3 to 3.5 but did not change the problems.
Maybe you guys have some ideas what else can i try.
thx a lot in advance. i hope i provided all informations which are necessary.
greetings faxe

Hi,
i tried a few more things which make confident that i have the problem narrowed down to the memory.
i tried to install windows again with only using the third memory slot single channel and it worked fine.
now i tried to go down with the memory speed to ddr333 and using dual channel and so far that seems to work too.
so i think i will go for other memory.
if you think i am wrong please correct me
greetings markus

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