New to overclocking, need a little help...

[REDtoLINE]

Ok, so i have an AMD Athlon 64 4000+ San Diego, and i was hoping to get this guy up to 2.8GHz, but have hit a brick wall at 2.7GHz. My last run was an FSB of 220MHz, and my cpu multiplier is on the default 12x. I have already increased my vcore 6.6% (1.492v) and do not want to risk increasing it anymore. While i was running prime95, i monitered my CPU temp, and it maxed out around 55C. After i restarted and set my FSB to 225, windows would no longer load. I am wondering what might be the bottleneck right now, as i have already set my HTT Frequency down to 3X, and my memory clock index value to 133MHz. I find it hard to believe that i cannot get more out of this processor. My specs are as follows:

AMD Athlon 64 4000+ San Diego
MSI K8N Neo4 Platinum
OCZ DDR400 2GB Dual Channel (2x1GB) @ 2-3-2-5 1T

Is there something i am missing here, or have i really just hit my max? Should i continue to increase my vcore, or is 1.5v pretty much the max? Also, what is a good temp to be at while stress testing small FFTs on Prime95?

 

[Mogadon]

You may well have hit a wall at that voltage, you can safely go up to 1.55V on the VCore with no worries as long as your temps are good, though 55C is getting up there, i'm presuming you're using the stock heatsink?

 

[SparkyJJO]

that would stink if you hit a wall, cuz I just got my 3700+ san diego up to 2.86GHz today, which seems to be my limit. Your temps look a bit high, what cooler you using? Mine was at 48C max while running prime95, using a zalman CNPS9500, also in a really warm room (computer heats the room nicely and the AC isn't functional )