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KT133a Owners-running stable at 133fsb?

G

gnoymyguy

Senior member
Does anyone have trouble running at 133fsb? I ran a Duron 750@931 on 133fsbx7 and found I couldn't cold boot. I can run @972 perfectly stable on 108fsbx9, cold boot perfectly too. I can't underclock less than 7x either.
 
The MSI has problems with the multiplier, especially when set to 133MHz FSB. Nothing wrong with the KT133A chipset itself.
 
Durons run at 100MHz FSB (200MHz) so your default multiplier is 7.5. You can increase the mulitplier with no problem but when you decrease it, that is when you might run into problem. Your settings are 7.0 X 133 but since you CPU default mult is 7.5, it seems your system is trying to do 7.5 X 133 and it can't hit the soft menu in the BIOS fast enough to drop it to 7.0 X 133. So infact, your system thinks it is trying to boot up at 998MHz which the chip can't do. 😉

 
JackBurton, I know what you mean-does that mean I'll have to do the L6 bridge to get it to boot at 7x by default?
 
heng1028, that Infineon you're using, is it rated at cas2 originally and what chips does it use cos' mine is cas3 and using Siemens chips, dunno if it is the bottleneck stopping me from running more than 144.😱 Could be the crap oem MX I'm using, that can't overclock 5%:disgust:
 
Did you see anand's article about the 100-132Mhz/133+Mhz FSB Jumper?

It's like Jack burton described, becuase of that jumper the FSB is set to 133Mhz at power on time, but the multiplier isn't lowered to 7x until the BIOS initializes...apperntly your chip can't run at 1Ghz even for that long.

I had a chip...it would run ok at 824 (8x103), but 832 (8x104)was flaky, 840 (8x105) wouldn't load windows and 850 (8.5x100) woudln't POST.

But after fiddling around with my cooling a bit I can get the chip to run stably at 900.

It's possible your chip won't POST past 972Mhz, but you might want to check your cooling...do you have good thermal paste? Too much thermal paste? Not enough? (In my situation above I had too much, in which case it acts as an insulator)
 
gnoymyguy:

i was hoping my infineon can hit over 150 but unluckily it can only stable at 147 CAS222 🙁

it is either your north bridge problem or the ram problem in this case
 
133 222 here...

Stupid thing won't post above 136 MHz, though, no matter how low the multiplier is set. The RAM works fine at 150 MHz (120 FSB, 150 memory), so I know it's not the problem.

Viper GTS
 
The Infineon RAM is Garbage when you want to overclock. Mine would only take me to 143 CAS2 5-2-2. I'm perfectly stable at 155 Cas3 but I get better performance at 143. I need some better RAM.
 
Viper GTS - I don't know I upgraded the fan before I installed the mobo. One look at that dinky fan and I new it was time to beef it up. Which mobo dou you have? Some don't even have a fan on the heatsink and I don't think any of them have any heatsink compound on them. Take that thing off, put some arctic silver on it, and put a good fan on it.
 
im using the iwill kk266 and i have run stable up to 167 ffsb, with ram settings to the lowest. currently its running at 155 everything fastest (gotta love mosel). works like a charm. the iwill kk266 cant be beat when it comes to fsb overclocking.
 
I had my 256MB Crucial running at 150MHz at CAS2 no problem.....had to bump back down to stock speed until I get better cooling, though
 
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