I'm doing a survey on BX and OC

[BBA]

Ok..Everyone here with a 'BX' motherboard should participate in this.

I'm looking at PCI divider ratios. I believe the original 'BX' chipset does NOT support a 1/4 PCI divider. I believe the 'ZX' chipset is really soldered in the boards that do 133MHz w 1/4 dividers, but they are being marketed as 'BX' boards.

Here's what I want:

Remove the heatsink from your motherboards BX chipset ( usually uses a pull thru pin mounted heatsink tab ) and list the board type, FSB/PCI Ratio options and chipset part number suffix...either 'BX' or 'ZX'

I think that the ZX is a superior chipset, but intel did not market it as that...because it was originally designated as a 'celeron motherboard' chipset and carried a low performance rap.

[BBA]

I'll start:
1. Abit BH6 R1.1, ZX chip, FSB/PCI-1/4 options.

2. Abit BF6, ZX chip, FSB/PCI-1/4 options.

3. Abit BH6 ( early ), BX xhip, no PCI ratio options listed ( 1/3 default )

4. Epox KP6-BS, BX chip, no PCI ratio options ( 1/3 default )


Oh...you should remove the heatsink and apply thermal compound on it anyhow...if not for the purpose of this study...but for stability in general.

[AuraEdge]

Now didnt this ZX have a 4 memory bank limit?
I remember my old SY-6BA+III having a 1/4 multiplier (142 FSB at one point w/ an old processor), but I had 2 double sided DIMM's an 1 single sided in it.
I dont have this board anymore, so I cant find out.

[BBA]

C'mon...all the people here, no one is interested to find out?

[AuraEdge]

I think this deserves a bump..I would have never thought the ZX that silently died down would have been used in the BF6.
Which would be a good reason for every motherboard manufacturer using those little green sinks.
Did intel find a way around the 4 DIMM bank limit? Are the slots all bus mastered like in the BX?

[Roy]

MSI 6163Pro ~ FW82443BX & FW82371EB.
Definitely x1/4.

Something in the back of my mind tells me that the smaller (second) member of the set manages the PCI/IDE busses.

[Mntsnow]

BBA, I will be happy to the check for you when I get home from work tonight...I've just been to busy to do it yet!! lol

[Ygor]

The MSI BX Master uses the same chip as the 6163 in Roy's post, 1/4 is available.
Sandra makes this info available too.

[Spencer]

I don't know about what it says on the actual BX chipset(too lazy to take the motherboard out and I already have thermal paste under the greenie), but my Abit BE6 has 1/4 PCI divider available after 124MHz FSB in the BIOS.

[BBA]

Hmmm

One BX that is verified to have 1/4.

My theory may be wrong. Roy...Can you double check the actual number on the chip? If your right on both counts, then the theory is gone.

[Mntsnow]

Sorry BBA My bx6-2 has a plain jane bx chipset and only a 1/3 divider

[Ygor]

What I saw from Sandra for chipset info was "82443BX/ZX 440BX/ZX PCI host bridge. (AGP implemented)" Probably the same chip as in Roy's 6163.

[alpha]

This is what I'm thinking:
Early BX's = 1/3
Next revision = 1/4
ZX is the second BX revision with a few pins missing. That's my theory. http://sysopt.earthweb.com/forum/smile.gif

[BBA]

Can't take Sandra's results with any seriousness, but ROY has a point.

There may be a way to sub in a different clock IC chip in a motherboard with a 1/3 divider and gain the 1/4 divider.

A new project I think.

[Mark]

ASUS P3B-F - In the bios it supports 1/3 and 1/4 at 124 and 133. Too much trouble to get the heatsink off.

[clockinfreek]

my bx6 rev 2 has 1/4 @ 117.
I have even been able to get my cel 566 to do 995 through fsb, but not stable for long.

[neo_otyugh]

abit bf6
supports 1/4 pci divider
sandra says...
i440BX-W977 and
82443BX/ZX

[bhess]

BE6-II
chip says FW82443BX
intel '98
1/4 pci I didn't have this option before I flashed the bios.
I bought the board 2-2000
hope I told everything you wanted.