|"Board: MICRO-STAR INTERNATIONAL CO., LTD MS-7142 1.00"|
I believe what you have is the MSI K8MM-V. Does it look like this one:
System performance will improve significantly if you add more RAM. 512MB isn't enough these days. And if you're still using the onboard graphics, you'd be better off adding an AGP video card. Even a cheap card will be better than the crappy Unichrome IGP.
As for overclocking, you can't just raise the CPU frequency. There are a number of changes that have to be made at the same time. But to do it, you HAVE to know what speed RAM you have. Try running CPUZ, then click on the SPD tab. What is listed for Max Bandwidth? Then click the Memory tab...what is listed for DRAM Frequency?
I can give you some BIOS settings to look for & make some general recommendations, but if you don't have all these options, you're not gonna accomplish much, if anything:
Cool 'n' Quiet = disabled
Spread Spectrum = disabled
AGP frequency = 67MHz
DRAM frequency = 133MHz (if you have DDR333), 166MHz (if you have DDR400)
CPU frequency = 250MHz
CPU multiplier = 8x
CPU voltage = 1.45v (may need to go higher)
HT (HyperTransport) multiplier = 3x (or 600MHz)
If the above works, the CPU will run at 2.0GHz, the RAM at either 166MHz (DDR333) or 200MHz (DDR400) & the HT bus at 750MHz.