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How much higher than 100fsb will BX boards go?

S

smp

Diamond Member
Me and a friend are upgrading our PII233 servers. We both have the same HP vectras that have EDO ram slots only. We both decided to grab newer boards off of ebay so that we can get SDRAM (lots of it since it's so cheap). I ended up getting a Asus P2B and he got the Abit BH6. I think that his board will support higher clocked cpu's than mine, but it's okay for now, because I got a celly 333a with mine. He is looking for a chip to get with his and I'm not too sure if he can run a 133 kind. I don't think that he can on that board, but I have heard of people running up to 1 gig.
I know that we should get socket converters for any socket PIII/celerons we might get, but I want to know if there is potential to overclock say a 700e to 933 or anything over 100fsb. I know I can oc my celeron to maybe 500 if it runs at 100fsb, but I don't know how you overclock PIII's on those boards. Thanks.. oh, and if anyone knows if the P2B will support coppermine.. I have heard both yes and no, so I'm not sure, it might have been the P2B F or the P2B S, same for the BH6, thanks. LMK
 
both those boards should be able to run a p3 with a slotket. make sure your video card, if its an agp card, can handle the higher clocked agp bus (2\3 of 133 = 88mhz) or just get a 100mhz fsb p3, maybe hard to come by tho. i would put my money on the bh6 getting a 133mhz bus p3 to work. i have a soyo sy6ba+3 which is a 440bx board, and it runs my p3 733 just fine in a slotket. (only supposted to support p3 600\100mhz bus) the p2b on the other hand is an older board, so im not sure if the bios can handle the newer 133mhz fsb p3's. there is support for p3's noted in the latest bios update tho. i think the most your gonna get out of it would be a 600\100 p3, maby a 650\100 if you can find one. and make sure to keep em cool with some thermal paste and a decent heatsink =)
 
smp, I can speak to the BH6. First off, before your friend drops a processor in there, he should put your Celeron in and flash the BIOS (ver SS if it's a rev1.0x board, ver SP if it's a rev1.1 board).

After he successfully flashes the BIOS, then get a good Slotket (Abit SlotketIII, Asus, IWill, MSI; just make sure it's for FC-PGA, not the earlier ones that were only for the first generation Celeron socket cpu's) and a decent HSF (lots out there for the P!!!s that won't sound like a hair dryer).

Plop the slotket, cpu and HSF on the BH6, go into the BIOS and disable Speed Error Hold in the SoftMenu section. Check to make sure the voltage, multiplier and FSB is correct, and you should be good to go.

RE applicable processors, I'd stick w/ one of the 100FSB PIII's, as getting a 133FSB to run on the BH6 will be a bit of a trick. And, at 133FSB you're pushing your AGP to 89MHz, and PCI to 44MHz, and the odds of at least one of your peripherals balking at this is good. So, the cheap way to go is w/ a CeleronII, maybe even one of the 100FSB CII's. Or, a P!!! such as a 700 or 850.
 
Both boards should support coppermines with the latest BIOS update, and both have the 1/4 PCI divider for 133FSB. Just get a tolerant AGP video card(There is an old anandtech article about overclocked AGP bus and which cards worked) or a PCI video card if you want to use a 133FSB cpu. If you're sticking with 100FSB, the highest P3 you can get is 900mhz cC0 or 1.1ghz cD0(Coppermine-T)
 


<< None of those boards support 1/4 PCI divider. >>

I think the P2B does. It's not mentioned in the manual, but I remember reading a post from some guy who O/Ced the fsb to 133 and found out that the PCI bus was (to his surprise) still running at 33.
 
I have just finished upgrading my Asus ATX P2B, revision 1.10. (rev no is printed on motherboard between ISA slots) I am running a PIII 1Ghz FCPGA 133Mhz FSB, cCo Stepping, S-spec SL4C8, 1.70 Volts core voltage which was set manually on the Asus Slotket S370-DL. The latest cDo stepping uses 1.75 Volts core and there is some doubt if the motherboard regulator is upto supplying power in increments/decrements of 0.05 in which case you may have to use a higher voltage that is 1.8 Volts. Andy Hui and Mkoh amongst many others on AnandTech forums held my hand through the whole process, many, many thanks owed to them. Mkoh said he was running a PIII 933 at 133FSB, on his rev 1.02 P2B. Not sure if he meant that or he was overclocking a 700/100 at 933. 100Mhz CPU's are difficult to come by.

You need to flash the latest bios 1013.007 beta from Asus, Germany, website. ftp://ftp.asuscom.de/pub/ASUSCOM/BIOS/Slot_I/INTEL_Chipset/i440BX/P2B
Set FSB jumpers on motherboard to 133Mhz. My motherboard had 2 options for 133 MHz. One with PCI at 33.3 and another at 44.33 Mhz. You want to stick with the former ONLY. The AGP is the only problem as it runs out of spec at 89Mhz, but my Matrox G450 is coping well so far, no problems thrown up as yet. CPU multiplier is supposed to be locked into the CPU, but i went ahead and set it at 7.5 on the motherboard. And I used 256MB PC133 Cas 3 Hyundai Ram. Everything seems to be working fine. Hope this helps. Good luck.

Ck

 
I'm pretty certain that all BX boards have a 1/4 PCI divider at 124/133fsb except maybe really early steppings. You just need the BIOS update.
 
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