I have a pretty "cool"(as apposed to warm) computer with at least six fans, an and an Armour VA8000B case. However after recently installing my new GFX card and power supply (600w), my computer just randomly turns off once in a while, mind you the fans are still spinning, things "seem" to be working but nothing is apparent on the screen, same thing happens with other PSUs and GFX cards, I think I may have isolated the problem but I am not sure. My CPU averages around 60C Idle and god knows how high in actual game play. Here's my PC info.
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Processor Information:
Vendor: GenuineIntel
Speed: 3412 Mhz
2 logical processors
1 physical processors
HyperThreading: Supported
RDTSC: Supported
CMOV: Supported
FCMOV: Supported
SSE: Supported
SSE2: Supported
3DNOW: Unsupported

Network Information:
Network Speed: DSL/Cable > 2M
IP Address: 192.168.1.XXX

Windows Version:
Windows Vista (32 bit)
NTFS: Supported

Video Card:
Driver: NVIDIA GeForce 8800 GTS
DirectX Driver Name: nvd3dum.dll
Driver Version: 7.15.11.6369
DirectX Driver Version: 7.15.11.6369
Driver Date: 12 Sept 2007
Desktop Color Depth: 32 bits per pixel
Monitor Refresh Rate: 60 Hz
DirectX Card: NVIDIA GeForce 8800 GTS
VendorID: 0x10de
DeviceID: 0x193
Number of Monitors: 1
Number of Video Cards: 1
No SLI or Crossfire Detected
Primary Display Resolution: 1280 x 1024
Desktop Resolution: 1280 x 1024
Primary Display Size: 17.80" x 14.21" (22.76" diag)
45.2cm x 36.1cm (57.8cm diag)
Primary Display Type: DFP
Primary Bus Type Not Detected
Primary AGP GART Not Detected
Primary VRAM: 640 MB
Primary Monitor Vendor: Samsung
Primary Monitor Model: Samsung SyncMaster
Supported MSAA Modes: 2x 4x 8x

Game Display Settings

Sound card:
Audio device: Speakers (C-Media High Definiti

Memory:
RAM: 2046 Mb

Miscellaneous:
UI Language: English
Microphone: Yes, I have a microphone.
Media Type: DVD
Total Hard Disk Space Available: 228941 Mb
Largest Free Hard Disk Block: 136364 Mb

Tell us about your new 600W PSU. If you didn't pay close to $100 (or more), it *may* be the cause of your problem. Also, 6 case fans is overkill & 60C at idle is WAY too high.

The PSU is an "UltraXFinity" SLI Ready 600wat power supply,

Sorry, I meant to say, 4 Case fans and a fan pci card (with 2 fans too cool the GFX card) = 6 fans

Whatever, it's still overkill.

Your PSU *should* be OK...then again, there may not be enough amperage on the +12v2 rail to handle your video card. Is this your PSU?

http://www.ultraproducts.com/produc...

I don't know what brand 8800GTS you have but apparently it's the 640MB version. Two of the most popular brands are eVGA & BFG. eVGA recommends a minimum of 26A & BFG recommends at least 28A.

Your problem could also be caused by an overheating CPU. 60C at idle is high, but not totally unusual for a Prescott (if that's what you have). Are you running the stock HSF or an aftermarket model? Did you use a thermal pad or paste? If you used paste, you should have applied just a small dab about the size of a BB or grain of rice.

http://www.arcticsilver.com/pdf/app...

- Motherboard ASUS P5GDC Deluxe (With stock HSF) -Socket 775-
-- Installed in 2004 also added thermal paste only once back then.
- CPU is the standard Intel P4 3.4 GHz
- The GFX card is the nVidia 8800GTS 640MBs
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Wondering if I should replace the stock HSF with this one...

[ http://www.sidewindercomputers.com/... ]

Thanks for all of your help so far. =)

Oh yea, and as for the PSU question, yes you found the correct one./

Same issue here with same graphics card. 720w psu. Did you find a solution?