Vista - New Computer Freeze

Just built a new computer, i get random crashes when i play games. The screen will just freeze and i have to manually reset the pc, when it freezes i hear a screeching sound coming out the speaker.
i have attached a copy of the mini dump file , anyone has a clue whats causing this issue?

Hi Muplayer, welcome to the board.
Have you monitoring the temps? It is important especially for a new build. Double check your cpu fan set well and thermal past is applied properly. Blow house fan into open case to see if problem persist. Check if SATA contacts are good; loosen SATA cable is known problem for freeze. Run some tests on the rams. Next thing to check is power supplys especially on unreliable brands. It these are not it, we figure something elses. Good luck and let us know what's up.

Post your system specs may help in diagnostic.

hi thank you,

temp are fine.
MB temp@ 20-30 degree
CPU: Average 40 C
GPU: 40C
PSu: 850w OCZ
Cooling: Artic cooling with nice pasting on cpu
Motherboard:
CPU Type QuadCore Intel Core 2 Quad Q9550, 3400 MHz (8.5 x 400)
Motherboard Name Foxconn BlackOps (3 PCI, 3 PCI-E x16, 4 DDR3 DIMM, Audio, Dual Gigabit LAN, IEEE-1394)
Motherboard Chipset Intel Beachwood X48
System Memory [ TRIAL VERSION ]
DIMM1: Corsair XMS3 DHX CM3X2G1333C9DHX 4 GB DDR3-1066 DDR3 SDRAM (7-7-7-20 @ 533 MHz) (6-6-6-18 @ 457 MHz)
DIMM4: Corsair XMS3 DHX CM3X2G1333C9DHX [ TRIAL VERSION ]
BIOS Type Award (05/09/08)
Communication Port Communications Port (COM1)

Display:
Video Adapter ATI Radeon HD 4800 Series (1024 MB)
Video Adapter ATI Radeon HD 4800 Series (1024 MB)
3D Accelerator ATI Radeon HD 4870 (RV770)

Anytime i play 3d game , i get a random crash.
If i do a system stability test i get a crash within 20min

You've answered your own question.

Your overclock is not stable; thus, nothing you do will be stable. Whatever you might be using to check system stability, if you can't pass 20 minutes of it, then that should tell you something?

Hi muplayer and welcome to the forums

I have had a look at the manual for your motherboard (you may need to refer to this to follow this post). You state that you are using DIMM1 and DIMM4. You should be using DIMMs1 and 3 or 2 and 4 (i.e. both blue or both white sockets). Make sure that all settings in your BIOS are set to 'Auto' and that the FSBSEL jumper is on pins 1-2 (default). Check that your graphics cards are in the correct slots.
Leave the side off your case and when you next start your system, enter the BIOS and select 'PC Health Status'. Keep an eye on this, and also keep an eye on the 'Onboard Debug LED'. If your system seems stable after 20 mins or so, reboot into Vista but don't run any programs. Again, monitor the LEDs. Next, run some programs and install other programs whilst monitoring the LEDs. Please post back with any codes shown on the LEDs and what you were doing when they appeared. If you get a code appearing whilst you are monitoring the 'PC Health Status', please enclose the readings from that as well.

Graphic card is correct slot running at 16x
I monitored pc health status in bios, and also check cPU/ Motherboard/and graphic card temperature, they on average 40C and max 57C on load.
All my settings in BIOS are in Auto or default
My case is left open there is good airflow

Did you check the minidump file i attached? it seem the same file appearing everytimethe computer freezes.

Dram voltage is at 1.7v
Cpu around 1.28 v

The freeze seem to happen when i play games

An Intel Core 2 Quad Q9550 is 2.83GHz. If you're running yours at 3.4GHz, then everything isn't at default. Again, your overclock isn't stable, you said as much when you said you could not pass 20 minutes of a system stability test.

Go into the bios and load the optimized defaults, then see if you still have problems. If you don't, then the "problem" is not your hardware or Vista.

Same issue even with default option.

As anyone viewed the minidump file i attached? its the same that keeps coming back after each freeze, the freezes seem to be more frequent when playing games

I've already done this.See How to read the small memory dump files that Windows creates for debugging how do that.
But in this way very little to help you...undentified trouble with your hardware...

This is a update guys, i dropped the oc to 15% , got 3.2 ghz , 1222 MHZ ram. So far only 1 crash every 2 hours, not sure why its not stable at 3.5 ghz , Temperature is 40-50c average so no overheating , so what could possibily cause the unstability every part in the computer are optimised for overclocking.

Perhaps i need to increase ram voltage its at 1.8 atm, and cpu voltage is at 1.3