I recently bought a new computer about 2months ago.

Everything has been working 100% and I've had absolutely nothing to complain about. A week ago I bought a new chassis for my pc since my old one was as cheap as I could get. Then this problem started.

My computer starts up fine and then after a while it just switches off and warning beeps start. This problem is not consistent and it isn't limited to just certain applications - the computer can be idling and it will still cut out. Most of the time if I switch it off for a second at the wall or simply hit the reset button it will start up again. If I start it up directly after a crash then it normally crashes very quickly again. The components run at OPTIMAL temperatures.

I took a look on the Intel website to check what the beeps mean. I get 8 system beeps when I start up. This is the page: http://www.intel.com/support/motherboards/desktop/sb/cs-010249.htm According to this 8 beeps idicate display memory read/ write error. How is this possible? Everything is brand new.

I have taken out the graphics card and dusted it. I put it back in - power is connected - and problem persists.

My pC:

Intel DH55TC Motherboard
Intel I5 750 2.66Ghz
2x Kingston valueselect DDR3 1333Mghz 1GB RAM
Leadtek GTS 250 512mb
Seagate 250GB .11 series HDD
Samsung super multi 22x DVD writer

Chassis : Cooler Master Cavalier 3

Os: WINDOWS 7 ultimate 64bit

Screen: Samsung B2030Well your statement is  "everything is brand new" =true= but NOT original. You changed the chassis=case i assume. In order to take all the hardware from your "new" computer and install it in your "new" case 2 things have happened.
1. You removed everything= possible DAMAGE to a component.
2.you had to install everything into your new case=
a)improper or faulty installation
b) damage to a component
So this ought to give you some idea what you need to do=recheck everything again.truenorth Quote from: JacoG7 on July 09, 2010, 03:24:39 AM

...I have taken out the graphics card and dusted it. I put it back in - power is connected - and problem persists.

Leadtek GTS 250 512mb