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Well, 2X~ so far, its still been stable. Its about 10:20 here right now,
and its been on at 450mhz since around 11 am this morning. No lockups yet. I
have not really pushed it in any games yet, that will be the real test.
To overclock, though, it was not really a problem for me. I just put it in,
went to the bios cpu softmenu and selected user define. Then I set clock
multiplyer to 4.5, then bus to 100, then agp to 2/3 (agp bus speed will
equal system bus speed divided by 3 [100/3=33] multiplyed by 2 [2X33=agp bus
of 66mhz] you need to do this to get it to work properly at the 100mhz
system bus). Set sel 66/100 switch to high, and disabled the turbo
frequency.
Then I had to find the input output recovery times with the ram timings, and
set them to the Highest possible #'s which were 8 and 4. I dont remeber
which ones they are called, but its not too hard to figure out :)
I left cpu core at 2.0v then started up the puter. No good.... went past
post.. showed Celeron (tm) mmx cpu 450mhz, got to windows splash screen,
then locked up... :(
I shut er down and restarted and went to bios. At the cpu softmenu, I
selected 2.1v. Rebooted computer, got to windows, and CRASH!! locked up
before the taskbar could finish executing. Shut down and went to bios
again. Now I set voltage to 2.2v. Reboot and YAY! it went up all the way, no
probs so far. I ran quite a few benchmarks, and at most resolutions, then
after about the 4'th time through the crusher.dm2 demo, it locked up at
640x480 resolution. Just a total freeze... I think it may be more because of
the system ram, but it may be the cpu voltage. I set it up to 2.3v in the
bios now, and so far it is working good. No problems... If it does lockup
again, ill shut er down and reset er to 300, which I must say is still
FASTER than my p2 266.
Oh yeah.... I ran the zdnet cpumark99 cpu benchmark on my celeron, and also
on my p2 266 at both 266 and at 3.0x100 (300mhz). It ran about 21 at 266 and
23 at 300. My celeron running at 450mhz scores 35.1!!! Look at that
difference there! But then I went to an older benchmark.... norton system
information, and it reported 99 for my celeron at 300, and my p2 266 was
129. The celeron at 450 gets 143, the p2 at 300 gets 139. Almost the same
considering it is 150mhz faster in speed. Now I figured this one out before,
becuase of some posts I have read at another web site. This benchmark is no
good for any cpu's except p2's becuase it is a CACHE intensive benchmark
that will utilize the full 512k of a normal p2. This is why the celeron 300a
does not do as well as a p2 266, becuse of the AMOUNT of cache memory. But,
when you compare the two using other benchmarks that are cpu intensive (such
as cpumark99) the celeron scores higher, because it is a faster cpu... :)
Overall, so far, I am very pleased with my decision to go with this cpu.
Just a warning to you though, Get a really good celery sandwitch for your
333. They are not as easily overclockable as the 300, becuase you only wise
choice is 500mhz (5.0x100), and this is a push. You will probably get er
going, if you can keep it cool enough, but you will probably need to set it
to 2.3v to do it.
Oh yeah... to make a long post even longer... I would not recommend trying
any of the other available bus speeds. Such as 75mhz, or 83mhz or 112mhz.
You could try 103 mhz (enable turbo frequency).
83 mhz to me was INSTANT TRUNCATION of my FAT on my c-drive. Usually the cpu
will operate at this bus speed fine, but its you periferals that get upset
when you do it. There is no settings in the bios to adjust the pci or agp
bus speeds unless you run either 66mhz or 100mhz, so any other bus speed
will either mean overclocking the pci and agp bus, or under clocking, which
these buses like neither.
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