i have recently bought a 512 mb ddr 400 mhz pc 3200 ram module and installed it alongside another similiar module ( now i have 1024 mb of ram ). After doing this i noticed my computer suddenly reboots with no aparent reason.

Also i have ran several Bios information tools and all of them say that my pc has 4096 MB of memory.

I would like to know if these things are connected and how can i solve them.

This is the Bios Information Tool Reported

Program: eSupport.com BIOS Agent Version 3.41
BIOS Date: 08/04/03
BIOS Type: American Megatrends
BIOS ID: 62-0804-009999-00101111-040201-SiS648FX-1ABXX001
OEM Sign-On: A6585SMS V7.3 080403
Chipset: SiS 648 rev 80
Superio: Winbond 697HF rev 2 found at port 2Eh
OS: WinXP SP2
CPU: Intel(R) Pentium(R) 4 Processor 3000 Mhz
BIOS ROM In Socket: Yes
BIOS ROM Size: 256K
Memory Installed: 4096 MB
Memory Maximum: Unknown
Memory Slot 01: 1024 MB
Memory Slot 02: 1024 MB
Memory Slot 03: 1024 MB
Memory Slot 04: 1024 MB

Thx