Is this Psu good enough?

My computer has recently been plagued by a weird problem where it shuts off if theres a lot of heavy processing going on and then keeps rebooting every 3 secs after that and then sometimes freezing at the windows screen if it gets there... I realized it must be the psu and/or its fan since it was the oldest component on the rig and because I don't think my casings supposed to be super hot when I touch it...

I'm using a table fan right now to cool it with the case cover open and it works for now... but I want to get a new psu and wanted to ask if this 300 W one was a good one for my micro atx case.
HIGH POWER® SI-A300M3.From the other threads, I know wattage is less important than the Amp and Voltage comparison but so far this seems to be the easiest one for me to get.

My comp specs are:
Pentium D CPU 3.46 GHz
Asus P5VDC-MX motherboard (2 gb ram max)
768 MB DDR 400 (Pc 3200) Ram -> upgrading to 1512 mb soon
Inno3D 7300 gt (ddr 2 AGP version)
30 gb hard drive

Any helps appreciate, thanks =)

 

I wouldent use that PSU, never heard of the name before and dont really think the rating are that good, especially on the +12v. Hiper, Enermax, Antec, Seasonic etc.. are good brands.

Hiper HPU-4M580 Type R 580W ATX2.2 PSU - Black < That would be a good PSU, and you proberbly wouldent be able to buy the one in the link anyway because its in the US..

Check out the PSU Sticky, this is a very helpfull thread:
http://www.hardwareforums.com/power-supply-sticky-5218/

 

Dont use that PSU but you should definately read that sticky by BigB. it will tell you why

 

Thanks for the help guys, I've settled on the ThermalTake X550NP, its got 30A/5v and 18/12 v which should be fine till I decide to do a major upgrade on my system right?
X bit labs review of the Psu

I can get it for around 50 $NZ, I was originally looking for a good microatx psu but I think it should probably fit in well.

 

Yea that should be fine but when you decide to get a better graphics card such as a DX10 card one day, you will need to upgrade it again.

 

While I agree on the idea of a new PSU helping, you also might want to check the temps of the CPU. The best PSU you can buy won't help any if your CPU is overheating. You can check the temps in BIOS or get a program like [google]Speedfan[/google], or a multipurpose utility like [google]Everest Home Edition[/google] or [google]SiSoft Sandra[/google], which, among other things, can read the temperatures.

 

Thanks Big B, I used Speedfan to make sure that the new Psu had an effect, and luckily I was right, cpu temp dropped from 52C(with the case open!) to an average of 39-42C and the booting problems gone too . Thanks again Willz.