is my PSU stable? its been restarting over and over again and sometimes it doesnt boot

Intel core 2 duo e4500
nvidia 7800 gt with 6 pin
2gb of rams 667 kingston
and a hard disk 80gb
plugin wifi card
i dont know why it restarts i tried changing the ide cable which seems a bit strangled this started when i changed monitors from a flat screen to a 17" samsung syncmaster 740n from a acer flatscreen 13"

thanks for your time on replying. i checked my motherboard and theres no capacitors that are bulged. my hard disk makes a sound when starting up though and p.s. whenever my pc stops booting i notice that my cd-drive also doesnt boot up does that got any relation? my motherboard is asus p5s mxse

CPU
Intel Core 2 Duo E4500
Cores 2
Threads 2
Name Intel Core 2 Duo E4500
Code Name Conroe
Package Socket 775 LGA
Technology 65nm
Specification Intel Core2 Duo CPU E4500 @ 2.20GHz
Family 6
Extended Family 6
Model F
Extended Model F
Stepping D
Revision M0
Instructions MMX, SSE, SSE2, SSE3, SSSE3, Intel 64, NX
Virtualization Not supported
Hyperthreading Not supported
Fan Speed 2096 RPM
Bus Speed 200.0 MHz
Rated Bus Speed 800.0 MHz
Stock Core Speed 2200 MHz
Stock Bus Speed 200 MHz
Average Temperature 36 °C
Caches
L1 Data Cache Size 2 x 32 KBytes
L1 Instructions Cache Size 2 x 32 KBytes
L2 Unified Cache Size 2048 KBytes
Cores
Core 0
Core Speed 2200.1 MHz
Multiplier x 11.0
Bus Speed 200.0 MHz
Rated Bus Speed 800.0 MHz
Temperature 37 °C
Threads APIC ID: 0
Core 1
Core Speed 1200.1 MHz
Multiplier x 6.0
Bus Speed 200.0 MHz
Rated Bus Speed 800.0 MHz
Temperature 34 °C
Threads APIC ID: 1
RAM
Memory slots
Total memory slots 2
Used memory slots 2
Free memory slots 0
Memory
Type DDR2
Size 2048 MBytes
Channels # Single
DRAM Frequency 333.3 MHz
CAS# Latency (CL) 5 clocks
RAS# to CAS# Delay (tRCD) 5 clocks
RAS# Precharge (tRP) 5 clocks
Cycle Time (tRAS) 15 clocks
Physical Memory
Memory Usage 32 %
Total Physical 2.00 GB
Available Physical 1.36 GB
Total Virtual 3.85 GB
Available Virtual 3.29 GB
SPD
Number Of SPD Modules 2
Slot #1
Type DDR2
Size 1024 MBytes
Manufacturer Kingston
Max Bandwidth PC2-5300 (333 MHz)
Part Number 99U5429-005.A00LF
Serial Number 69095121
Week/year 28 / 08
JEDEC #3
Frequency 333.3 MHz
CAS# Latency 5.0
RAS# To CAS# 5
RAS# Precharge 5
tRAS 16
tRC 21
Voltage 1.800 V
JEDEC #2
Frequency 266.7 MHz
CAS# Latency 4.0
RAS# To CAS# 4
RAS# Precharge 4
tRAS 12
tRC 16
Voltage 1.800 V
JEDEC #1
Frequency 200.0 MHz
CAS# Latency 3.0
RAS# To CAS# 3
RAS# Precharge 3
tRAS 9
tRC 12
Voltage 1.800 V
Slot #2
Type DDR2
Size 1024 MBytes
Manufacturer Kingston
Max Bandwidth PC2-5300 (333 MHz)
Part Number
Serial Number 40CC6D00
Week/year 07 / 09
JEDEC #3
Frequency 333.3 MHz
CAS# Latency 5.0
RAS# To CAS# 5
RAS# Precharge 5
tRAS 16
tRC 21
Voltage 1.800 V
JEDEC #2
Frequency 266.7 MHz
CAS# Latency 4.0
RAS# To CAS# 4
RAS# Precharge 4
tRAS 12
tRC 16
Voltage 1.800 V
JEDEC #1
Frequency 200.0 MHz
CAS# Latency 3.0
RAS# To CAS# 3
RAS# Precharge 3
tRAS 9
tRC 12
Voltage 1.800 V
Motherboard
Manufacturer ASUSTeK Computer INC.
Model P5S-MX SE (CPU 1)
Chipset Vendor SiS
Chipset Model 671/FX/DX/MX
Chipset Revision 00
Southbridge Vendor SiS
Southbridge Model 968
Southbridge Revision 01
System Temperature 9 °C
BIOS
Brand American Megatrends Inc.
Version 0306
Date 9/5/2007
Voltage
CPU CORE 1.272 V
MEMORY CONTROLLER 1.856 V
+3.3V 3.248 V
+5V 4.848 V
+12V 12.713 V
VIN5 1.632 V
VIN6 1.904 V
PCI Data
Slot PCI-E
Slot Type PCI-E
Slot Usage Available
Bus Width 32 bit
Slot Designation PCIEX16
Characteristics 3.3V, Shared, PME
Slot Number 0
Slot PCI-E
Slot Type PCI-E
Slot Usage Available
Bus Width 32 bit
Slot Designation PCIEX1
Characteristics 3.3V, Shared, PME
Slot Number 1
Slot PCI
Slot Type PCI
Slot Usage Available
Bus Width 32 bit
Slot Designation PCI1
Characteristics 3.3V, Shared, PME
Slot Number 2
Slot PCI
Slot Type PCI
Slot Usage In Use
Bus Width 32 bit
Slot Designation PCI2
Characteristics 3.3V, Shared, PME
Slot Number 3
Graphics
Monitor
Name SyncMaster on NVIDIA GeForce 7800 GT
Current Resolution 1280x1024 pixels
Work Resolution 1280x996 pixels
State Enabled, Primary, Output devices support
Monitor Width 1280
Monitor Height 1024
Monitor BPP 32 bits per pixel
Monitor Frequency 75 Hz
Device \\.\DISPLAY1\Monitor0
NVIDIA GeForce 7800 GT
Manufacturer NVIDIA
Model GeForce 7800 GT
GPU G70
Device ID 10DE-0092
Revision A2
Subvendor XFX Pine Group (1682)
Series GeForce 7
Current Performance Level Level 1
Current GPU Clock 275 MHz
Current Memory Clock 1050 MHz
Technology 110 nm
Die Size 334 mm²
Transistors 302 M
Release Date Aug 2005
DirectX Support 9.0c
DirectX Shader Model 3.0
OpenGL Support 2.0
Bus Interface PCI Express x16
GPU Clock 275 MHz
Memory Clock 1050 MHz
Driver version 6.14.11.8585
BIOS Version 5.70.02.13.12
ROPs 16
Shaders Vertex 20/Pixel 207
Memory Type GDDR3
Memory 256 MB
Bus Width 64x4 (256 bit)
Pixel Fillrate 4.4 GPixels/s
Texture Fillrate 4.4 GTexels/s
Bandwidth 67.2 GB/s
Anti Aliasing Modes 1x2OGSS, 2x2OGSS, 4x4OGSS, 2xRGMS, 2xRGMS+5, 4xS, 6xS, 6x, 2x1OGSS, Gamma, 4xRGMS, new2 8xS, 16xS, 4xOGSS, Trans MS, Trans SS
Filtering Modes Bilinear, Trilinear, 16x Anisotropic
Noise Level Moderate
Max Power Draw 85 Watts
Count of performance levels : 2
Level 1 - "Default"
GPU Clock 275 MHz
Memory Clock 1050 MHz
Level 2 - "3D Applications"
GPU Clock 450 MHz
Memory Clock 1050 MHz
Storage
Hard drives
ST380215A
Manufacturer Seagate
Form Factor 3.5"
Heads 16
Cylinders 9,729
Tracks 2,480,895
Sectors 156,296,385
Device type Fixed
ATA Standard ATA/ATAPI-7
Serial Number 9QZ2XVS2
LBA Size 48-bit LBA
Power On Count 2136 times
Power On Time 519.4 days
Features S.M.A.R.T.
Max. Transfer Mode Ultra DMA/100
Used Transfer Mode Ultra DMA/100
Interface ATA
Capacity 74 GB
Real size 80,025,280,000 bytes
RAID Type None
S.M.A.R.T
Status Good
Temperature 36 °C
Temperature Range OK (less than 50 °C)
01 Read Error Rate 115 (098) Data 000599D9EA
03 Spin-Up Time 098 (097) Data 0000000000
04 Start/Stop Count 098 (098) Data 0000000870
05 Reallocated Sectors Count 100 (100) Data 0000000000
07 Seek Error Rate 085 (060) Data 00146B78BC
09 Power-On Hours (POH) 086 (086) Data 00000030B1
0A Spin Retry Count 100 (100) Data 0000000000
0C Device Power Cycle Count 098 (098) Data 0000000858
BB Reported Uncorrectable Errors 100 (100) Data 0000000000
BD High Fly Writes (WDC) 100 (100) Data 0000000000
BE Temperature Difference from 100 064 (048) Data 00251D0024
C2 Temperature 036 (052) Data 0000000024
C3 Hardware ECC Recovered 079 (067) Data 00059C7DA9
C5 Current Pending Sector Count 100 (100) Data 0000000000
C6 Uncorrectable Sector Count 100 (100) Data 0000000000
C7 UltraDMA CRC Error Count 200 (158) Data 0000000134
C8 Write Error Rate / Multi-Zone Error Rate 100 (253) Data 0000000000
CA Data Address Mark errors 100 (253) Data 0000000000
Partition 0
Partition ID Disk #0, Partition #0
Disk Letter C:
File System NTFS
Volume Serial Number 60C11DED
Size 74 GB
Used Space 11.7 GB (16%)

any software that can give you a detail of something specific you may need on my pc that i can give you so you can try to see whats the problem?