the psu looks a little on the light side for the system and would cause it to heat up
one thing: the efficiency of a psu is NOT the max load it can take, the efficiency is the rate at which the psu converts ac into dc. so, if there is 300w load on the psu, and it is 70% efficient, it will draw 430w from the outlet, so 130w of that will get dissipated as heat in the conversion process. therefore, low effiency psus are low quality ones in that they get very hot since theyre wasting alot of power. he doesnt have that powerful of a system though, so his psu isnt overloaded, its probably just something wrong with the fan control, is there any way to just put the fan to run all the time?Yeah; I must agree with Dai. I am surprised you got that far with it really!
I recently replaced two PSU's from systems very similar to yours with antec TP-550's in them. They werent causing any trouble yet, but the 12volt rails were drooping down into the low 11volt readings like 11.7 to as low as 11.4 when the customers were gaming
your system is just to much "draw" for it your PSU will soon enough pop its cork, thats when you fry motherboards or memory sticks or video cards etc. Dont mean to alarm you, but feel obligated to tell ya!
The trouble with the SP & True Power Series is they are only 70% efficient thats means they are really at full load with 70% of the MAX rated wattage.
(Max rated wattage is their "selling" wattage
I suggest you look for the Antec Trio rail 650 watt PSU at newegg.com for $99.00 after rebate. This unit is 85% efficient! and is a head and shoulders above the SP and Tru Power product line. The Trio rail is antec answer to the ever more demanding computer voltage needs these days.
The Antec units are decent built, as evidenced by your 450 is trying to pull the wagon!
you could sell off your old unit on ebay to take some of the bite outta the new purchase ???? :4-dontkno