Hello everyone

couple of days ago i start to hear a buzzing noise coming from my power supply, if i surf and work 27/4
on my pc its fine, but go to run a game, at some point it shuts down and reboots, also i have noticed
if i am changing web pages etc, the noise changes, higher and lower buzzing tone, but always the same noise...its like its sucking my power or something

pc specs + stuff i have done
quad core "renewed cpu paste"
gtx460 checked drivers "no break down in graphics when playing"
3 gb ram "checked with new memory tested with 4 gb ram"
vista 64
750 power supply "approx 4 years old" or more !!
3 hard drives, 750,500,150 2x sata's 1 mormal

my pc is about 4+years old but it as only had few times its been turn off due to beta game testing all hours of day and night..
the noise is like a sound you sometimes hear at the back of old tv's !
like i said above it will surf and do little work with no problems 24/7
put a game in and it switch's off like 5 mins into it approx, it does not freeze or lock up..

replie to "windows8"

no speed problems runs like it is running normal..for CPU goes how do i check that, but like i said its just like someone switching it off
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replie to "cytherian"

graphics card is nvid geforce GTX460 OC
1024mb directx 10
not even 8 months old !
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replie to "Patonb"
alpha A power Supply model ATX750

the systerm i built myself......
like i said before pc does NOT lag or freeze, just switches off then reboots

Unplug everything and open the machine. Check the and make sure the fan isn't rubbing against any wires or anything. If it's buzzing that's a dangerous sign and you don't want to take that lightly. Fix it ASAP. My father had his computer burst into flames on two separate occasions due to the power-supply.

replie to xBlackheart
the buzzying is 101% coming from the power supply, opened up the machine couple of days ago
to clean ainside it...wow could grow something in there, but its is now like new apart from this
noise, which i hate just right through me, high buzzy noise...so bad i turn it off and play on my
360 instead lol

no wires where touching anywhere, i now switch the machine off if i leave the house !
or finish using it

thanks for the replie

this is nearest shop
and looking at something like these, which would you say is best and which will run
my pc ok ? please look thankyou

OCZ ModXStream Pro 700w Silent SLI Ready ATX2 Modular Power Supply - Goldchip Computer Systems

Coolermaster GX 750W 80PLUS® Power Supply - Goldchip Computer Systems

right now i am about skint, but if its high priced power supply, i will have to wait longer..
sorry i can not afford top end unit