Hi All, I have seen many posts claiming that an AMD X2 4200 cpu can be oc'd to around 2.45ghz. I have tried to do this but the most I can reach is 2.30ghz. After that I get audio warnings of overload or various strange black screen messages from which I have to reboot. (Here's a link to an example - I wish I could just paste the pics into this post). http://www.imagef1.net.nz/files/100_05961200191820.jpg sometimes I just get an audio overclock warning and a nice little purplish coloured icon. or after POST it will hang with the name of my mobo at the bottom of the screen with no other cues or description. This doesn't happen when it boots normally. I'm a complete novice to overclocking and I'm getting a bit confused with terminology. Trying to follow guides and faq's has been frustrating as definitions/layouts differ with motherboards. My system specs are: AMD X2 4200 cpu A8N-SLI Premium mobo 2 x 1GB dual ddr pc3200 (200 mhz) RAM Vista Ultimate 64 bit OS Here are links to shots of the screens I have in BIOS which I'm having trouble interpreting. This link refers to an initial screen which seems to split the CPU from the Hyper Transport options. This I am a bit confused about. http://www.imagef1.net.nz/files/100_0593.JPG because then it gives me this option which I thought would be in the 'Jumper free' menu http://www.imagef1.net.nz/files/100_0594.JPG Then of course I can go into the 'Jumper free' screen and am confronted with a plethora of options. About the only one I can change that will not hang the system on boot-up is 'CPU frequency'. http://www.imagef1.net.nz/files/jumper_free_menu.JPG However the best I can get is maybe 235mhz then it will hang. I know that overclocking is a combination/balance of settings. How can I progressively up them? Then of course I have the RAM settings to consider and these are a bigger mystery. http://www.imagef1.net.nz/files/DRAM.JPG I've tried my best to give as much information as possible. I hope someone can shed some light on this.