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Hi Kurt,

If you can get to 166/166 with SpeedFan or CPUCooL, then I'd advise you to use CPUCooL's 'Fine-tuning' feature to go up from there.

Click here to get the proper version of CPUCooL for your motherboard
http://www.pcworld.com/downloads/file_download/0,fid,22842,fileidx,1,00.asp

When you are first installing CPUCooL, set it so that it loads with every Windows start-up. (this is not a 'critical' step, but you MUST install it)

Reboot

First thing it asks, when it comes up for the first time, is "Which mobo & Model"
You need to select the motherboard brand, version etc., before you can use it to change the FSB, which is what we want to do, first and foremost

Your "Mainboard" is ECS, and your "Mainboard type" is K7S5A

Now, click "Functions"> "Change front side bus/change CPU speed"
This will open a new page called "FSB"
Your PLL manufacturer is ICS, and the type is 9248-199 (get DF-EF)
Select the above, from the 'drop-down' list, on that FSB page, if it isn't already.

This 'Fine-Tuning' Option in CPUCooL is relatively easy to use, but is is definitely not 'intuitive', or 'user friendly'.
Now, click in the 'Fine tuning' box, on the FSB page.
This will open another new page, with NO title.

What we are trying to accomplish is to increase your FSB speed, by just a couple of MHz
To do that, you simply click the +60 button ONCE, and the box called 'Frequency', at the right-hand end of that row will increased by a few MHz
Pay no attention to the 'Divider', 'Gear', or 'FSB', just the number in the box below 'Frequency'.
Your monitor screen should now look SOMETHING vaguely like this one of my own M810L...

Whatever that 'Frequency' number is, if you divide it by your current multiplier, (15.0x ?, 15.5x ?, 16.0x ?), it will give you your 'new' CPU and DRAM FSB speed

click 'Freq Set' at the end of that particular row.

Click 'OK' twice and your true FSB speed, SDRAM speed, and consequently your CPU speed, should be set up a MHz or two. This is what we call 'fine-tuning'

Check out what your new speed actually IS, with CrystalCPUID, or WCPUID

If this 'new' speed seems to be stable and reliable, Exit CPUCooL, and this frequency will now be 'locked' (until you change it), into CPUCooL's memory


Re-open CPUCooL, and keep repeating the above sequence, (click the '+60' button TWICE, but this time do so in the next lower 'box', ('fine 2'), on that 'page-with-no-name')
That 'page-with-no-name' should now look something like this one...

Keep repeating this sequence, until things start getting 'flaky' on you... (freezes, crashes, reboots, blue screens, etc.)

Then, enter a 'Frequency' that's a couple of MHz LOWER, into the 'top' line, and, if you want this speed to load automatically, then 'check' the box at the end of that line that says "Use frequency in tray and CPUCooL startup".
Re-boot into Windows, check that it is increasing your speed, and play a game, to be certain that it's stable.
Now on every boot, or reboot, (or when you re-start CPUCooL), it will automatically set your CPU / SDRAM to that speed.

Good luck! And have some fun! Play a game... see if it's stable