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AMD 
Overclocking Guide
RAM Tweaking
Which Codes Mean What
AMD
Stepping's
Beginner's
Guide to Overclocking
Overclocking
Basic Traning
Testing Stability
Very Important
Tips!
Fanbus Mod
Clear
CMOS Switch
XP
1700+ Clocks
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PiLsY's guide to Ram Tweakage!
I would
suggest you go about things this way.
1) - remove all non essential pci
cards (lan etc) so youre just left with your gfx card plugged in.
2) - turn
off usb if youre not using it, if you are turn it off for now just for testing.
3) - set your cpu multiplier to something like 8x (if its not unlocked then
unlock it!
4) - set cpu voltage to 1.85v
5) - set ddr voltage to 2.7v
6) - boot into windows at your previous highest stable fsb
7) - run the
sandra burn in wizard set to do 10 loops of cpu bench, cpu multimedia bench and
memory bench. Should take around 11 - 12 minutes for all 10 loops.
8) - If this passes
reboot and increase your fsb by 2mhz, boot into windows and test again.
9) -
repeat above until you fail the burn in test (lockup).
10) - when you lock
up reduce mem timings to minimum (cas 2.5, no interleave, 3/6/3 timings, 2-level
queue depth, 2t command rate) and try the same fsb again. If this fails then
something else is holding you back. If it doesnt fail then keep going all the
way until it does or you reach 166mhz.
11) - when your done testing for fsb
then go back to 133mhz and set your cpu multiplier to say 11x, then increase
your fsb 1mhz at a time running the sandra loops again until it locks up. This
will find your max cpu speed. When youve found your max cpu speed do the
following :
Set your cpu to say 1400mhz and run a sandra memory bench
(old sandra not new! - 2001TE) starting at your max stable fsb with max timings
and increasing the fsb and decreasing memory timings as you have to. This will
help you find out at what fsb speed you get the most memory bandwidth. Try and
keep your cpu speed as close to 1400mhz as possible by adjusting the multiplier
in order to keep the tests as fair as possible. Make a note of at what fsb you
had to decrease timings. 4way interleave is usually stable arse the way thru,
youre most likely to have to change the command rate and timings, maybe the cas
rating. The most important timings in terms of bandwidth are highlighted below :
2/4-way/2/6/2/4-level/1T
And in terms of importance :
4way
interleave
command rate
the third timing (trcd?)
the first timing
(trp?)
cas rating
queue depth
the second timing (tras - should
always be set to 6 anyway)
Divide your max cpu speed by your best fsb to
find what sort of multiplier youre aiming for. If for example your max cpu speed
is 1500mhz and your best fsb is 162mhz then your best setting would be either 9
x 162 or 9.5 x 158. Test both settings to find which is fastest, again using
sandra memory bench, and possibly 3dmark 2001 as well. You may well find that
lower than max cpu speed and a higher fsb will be faster than highest cpu speed
and lower fsb. You can also try rounding up or down to the fsb where you had to
change timings, adjusting the multi as necessary. You should basically find
yourself with 3 or 4 combinations to check.
Once you have found your
desired FSB then add back your components one at a time testing with sandra
after each one is installed to find if one of them is crapping out on you. First
enable the usb, and then add in your cards in order of importance (ie sound then
modem then lan).
=============================================================
So, in general terms: it all relates to your fsb.
Step 1. Jack ram
voltage up to the max.
Step 2. Set it to slowest timings
2.5/4-way/3/6/3/4-level/2T
Step 3. Jack fsb up to the max. It should still
be stable and run folding.
Step 4. Bench it with sandra and see if you like
the speed.
Try changing the slower settings to faster settings. Read his
thingy for more on that. You may find that dropping the fsb a point will allow
faster settings which may give you more throughput for your memory bandwith.
Thats a good thing. Also, you may have to jack with the multiplier. A low
multiplier and high fsb is sometimes just as good or better than a high
multiplier and low fsb.
You gotta be patient. You gotta keep it cool.
You gotta live with it when you burn up your memory and processory and stuff. Or
when your system crashes and you lose whats on the harddrive. Thats the fun of
overclocking!
Buddy Jesus gave
me this, so if you want to know where it's from, ask him
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