Like most motherboards there's no way for me to monitor the temperature of the chip other than physically feeling it
You mean "unlike" most motherboards as clearly, most motherboards and CPUs do have sensors that can be monitored by the HW monitor provided with the motherboard (see your MSI utilities disk) or computer maker, or by one of the many 3rd party HW monitors out there like CoreTemp (temps only), SpeedFan and Motherboard Monitor.
PSU with a multimeter is really not a good or conclusive way to test a power supply. Like ALL
power supplies (including PC PSUs, gasoline engines and batteries), the proper way to measure the output is when the supply is under various "realistic loads". A bad power supply will often report good voltages with no load, then drop drastically as soon as any load is applied. To measure properly with a multimeter, you have to have the PSU connected to the motherboard, then jam hard, sharp, highly conductive probes into the connector, deep in the heart of the computer. This is very risky, even with steady hands. One slip and a dozen circuit traces could be damaged - not to mention potentials for ESD damage.
But even if skilled with a meter and have a steady hand, that test is not conclusive because typical multimeters cannot test for ripple
and other anomalies. The PSU may "appear" to be suppling correct voltages but excessive ripple is often the cause of unexplained computer problems likes freezes, sudden reboots, no-boots, and sudden shutdowns. So proper, conclusive testing can only be done a qualified technician using an oscilloscope or a power supply analyzer - sophisticated (and expensive) electronic test equipment requiring special training to operate, and a basic knowledge of electronics theory to understand the results. Therefore, conclusively
testing a power supply is done in properly equipped electronic repair facilities.
The better method for most "normal" users is to swap in a known good supply (with necessary ESD precautions), take it to a shop where it can be professionally tested by a trained electronics technician (often done free or for a nominal fee), or use a PSU tester, preferably one with a digital readout such as one of these
I keep one of those testers in my toolbag in the truck. They too are NOT conclusive because they do not test for ripple either. They do
incorporate a dummy load
however, though it is not large enough to be called "realistic". It is however, much more realistic than the "no" load provided by a multimeter.
Other advantages of these testers is they are keyed so you don't need to know the connector pin-out specifications or number patterns. They are also great for enabling a spare PSU to start up, then used for fan and drive motor testing.
No doubt, if all you have is a meter you can verify your PSU is outputting voltages (or not) - you just cannot tell, or assume the voltages are "clean" and stable under load.
Originally Posted by c0rr0sive
DO NOT open the PSU
I am often amazed how so many people think their computers are harmless. If it plugs into the wall, it can kill! There are deadly voltages inside the PSU. I agree with c0rr0sive - unless you are a certified electronics technician, stay out of the PSU! If you stick anything in there, make it wooden glue stick to hold the fan still while you blast out all the accumulated heat-trapping dust.