No info on GOOGLE on overclocking Athlon 4450B, as seen here ( https://www.google.com/#q=overclock++Athlon+4450B ) so I figured I would post here for reference in case anyone else some day wants to push a 4450B with an overclock. Below is information on the hardest I was able to push my Athlon 4450B before crashing.

Here is Hardware Info:

Biostar MCP6PB M2+ (Socket AM2+ Motherboard)
AMD Athlon 64 x2 4450B 1MB Cache 2300Mhz - Business Class CPU 45 watts
4GB Corsair DDR2 800Mhz XMS2 RAM
Windows 7 64-bit Home Premium
460watt Power Supply

- I was able to raise the FSB to 224Mhz from 200Mhz.
- I did not alter the voltages ( running default at 1.95VDC memory )
- Multiplier is locked at 11.5x for this CPU

* System crashes at 225Mhz FSB or greater, but was able to operate until crashing randomly at the 225 to 228Mhz range, and 229Mhz or greater the system will not boot and kicks back out to BIOS POST loop until the speed is reduced on the FSB to below 229Mhz FSB. I ran it EARLIER at 222Mhz FSB for 6 hours and no problems gaming at 2553Mhz at max CPU temp of 45C, decided to try for the maximum speed and no crashing, and reached 224Mhz FSB at 2576Mhz and at max CPU temp of 49C running both cores for 100% for almost 10 minutes.

Idle temp at 2576Mhz is 32C in a room that is 73F.

Going to lower this back to 222Mhz FSB from 224Mhz FSB because I WANT to have my max CPU temp back at 45C vs 49C and the extra 23Mhz is not worth the extra heat and running it to the max. 222Mhz FSB gives me a 11% overclock at 2553Mhz vs 2300Mhz native clock and is 1% less than the 12% overclock at 224Mhz FSB.

Note: In a different motherboard, and a better heatsink, you might be able to drive this CPU harder, but this is the maximum I could get out of this and have it trouble free. The heatsink I am using is rated for 65 watt CPU and this CPU is a 45 watt CPU overclocked, which makes it run hotter.

Attached is a screenshot of me forcing the cores to 100% by processing  3 raw video files concurrently with virtualdub64 as a way to give it a full load and watch the temps with speedfan. The red line is the video cards GPU from earlier testing in games with the overclock. With the game not running the GPU went idle and the temp plunged on the GPU.

*As far as system performance goes, it does feel snappier with the overclock enabled, however it is still just a Dual-Core with 1MB L2 Cache and so its still not as fast as my Athlon II X4 620 2600Mhz CPU system, but still a good CPU for games LIKE Skyrim, World of Warcraft MoP 5.4.2, GTA SA, Driver San Francisco, Need for Speed Carbon, Blades of Time, Scarlet Blade, Tera Rising, Allods, Aion, Neverwinter Online, and a load of other games with just the ATI Radeon HD5450 video card for normal game settings and 30-90fps at 1024 x 768 res, depending on the game played.

So this info is just here for reference so that if anyone ever searches for Overclocking a Athlon 4450B, now they will have some info to go with. I searched out the Athlon 4450E which is the cheaper CPU and there is info suggesting 2700Mhz out of that CPU, however temp issues at 65C due to inadequate heatsink to cool it. These CPU's are almost identical except for the fact that this 4450B has 1MB L2 Cache shared between 2 cores and benchmarks better as the Business Class CPU and the more common 4450E has 512k L2 Cache x2 for dedicated 512k L2 per core ( not shared ) and performs lesser on benchmark .

http://www.newegg.com/Product/Product.aspx?Item=N82E16819103256 Athlon 4450E info

http://www.newegg.com/Product/Product.aspx?Item=N82E16819103264 Athlon 4450B info

I bought this Athlon 4450B used off of ebay for $9.99 with free shipping. Not a bad $10 CPU



[recovering disk space, attachment deleted by admin]Cool!

I'll just add here for other people interested in doing this that overclocking is a massive case of "Your mileage may vary".  The settings above are good to compare to but that doesn't mean they should just be stuck into your system and used, all CPUs are different so you need to still work slowly tweaking clocks/voltages/multipliers until you reach a good point where it is stable and running cool.