ASUS P2B Rev.1.02

[Daniel Mandic]

Is it possible to drive the Board with 150MHz FSB?

Are any undocumented Jumpersettings available? I miss 105MHz and the
second 133MHz setting, with 44.3MHz PCI instead of 133/4 33.3MHz!? It´s
described but only the setting for 133/33 operations is shown.



Best Regards,

Daniel Mandic

P.S.: I could have a Mushkin 128MB (SSided 16Mx8) PC150 Cl.2... but
could a P2B run at 150?

 

[P2B]

Is it possible to drive the Board with 150MHz FSB?

Nope - well, not unless you figure out how to install a 150Mhz-capable
clock generator, which would be quite challenging as no pin-compatible
chips were made AFAIK.

Are any undocumented Jumpersettings available? I miss 105MHz and the
second 133MHz setting, with 44.3MHz PCI instead of 133/4 33.3MHz!? It´s
described but only the setting for 133/33 operations is shown.

P2B 1.02 has an ICS9148BF-26 clock generator, with three FSB selection
inputs for bus frequencies between 50 and 133Mhz. You have three FSB
jumpers on the board, so all 8 possible settings are available to you.

The clock generator datasheet is available if you're interested:

http://www.icst.com/datasheets/ics9148-26.pdf

150Mhz-capable clock generators used on other P2B series boards have a
4th FSB selection input, and a higher pin count (56 vs 48).

P2B

 

[Daniel Mandic]

Nope - well, not unless you figure out how to install a
150Mhz-capable clock generator, which would be quite challenging as
no pin-compatible chips were made AFAIK.


P2B 1.02 has an ICS9148BF-26 clock generator, with three FSB
selection inputs for bus frequencies between 50 and 133Mhz. You have
three FSB jumpers on the board, so all 8 possible settings are
available to you.

The clock generator datasheet is available if you're interested:

http://www.icst.com/datasheets/ics9148-26.pdf

150Mhz-capable clock generators used on other P2B series boards have
a 4th FSB selection input, and a higher pin count (56 vs 48).

P2B

Thanks a lot.


Could you say a P2B 1.02 is running stable at 133FSB, everything other
properly set up? PCI GfX.




Kind Regards,

Daniel Mandic

 

[P2B]

P2B wrote:





Thanks a lot.


Could you say a P2B 1.02 is running stable at 133FSB, everything other
properly set up? PCI GfX.

Absolutely!

I have a P2B 1.02 running a P3-S 1.4Ghz CPU on a Slot-T adapter, 768MB
Corsair PC133 CL2, U2W SCSI controller, and a couple of 10K U160 disks -
stable as a rock 7x24. Video is GF4 AGP, but I've run Voodoo3 PCI at
133Mhz FSB on other P2Bs, no problems.

After building numerous systems with Tualatin processors and scrounged
P2B 1.02 boards, I haven't met one that doesn't play nicely at 133Mhz
FSB

P2B

 

[Daniel Mandic]

Absolutely!

I have a P2B 1.02 running a P3-S 1.4Ghz CPU on a Slot-T adapter,
768MB Corsair PC133 CL2, U2W SCSI controller, and a couple of 10K
U160 disks - stable as a rock 7x24. Video is GF4 AGP, but I've run
Voodoo3 PCI at 133Mhz FSB on other P2Bs, no problems.

After building numerous systems with Tualatin processors and
scrounged P2B 1.02 boards, I haven't met one that doesn't play nicely
at 133Mhz FSB

P2B

Wow, nice System. It´s sounds to be solid.


My main System is only at 103MHz with the P3-S 1.4GHz, but the
stability amazes me every time. Nice to hear from you that even 1.02
P2B´s are solid rock stable at 133MHz.


I am thinking around about RAM to CPU latency...... I take the liberty
to ask you something.
Does a lower Multiplier (i.e. X2) have a lower latency than a higher?
Maybe 133x2 gives me a better system-responsibility than 100x3!?
What would you say?

My first Instance is a good and fast (stable)connection to the
ISA-Card. MIDI-Games etc. etc. Abandon etc.. ;-)
Only Windows95 (Best 3.1 Windows ;-)) is of matter. DOS is working so
and so (at all). Maybe I get VXD-Errors, when going with 133MHz!?




Best Regards,

Daniel Mandic

 

[P2B]

P2B wrote:




Wow, nice System. It´s sounds to be solid.


My main System is only at 103MHz with the P3-S 1.4GHz, but the
stability amazes me every time. Nice to hear from you that even 1.02
P2B´s are solid rock stable at 133MHz.

P2B-S 1.04 is even better. My file server runs a Celeron 1A at 1.5ghz,
150Mhz FSB - so both CPU and motherboard are overclocked 50%. I was a
little surprised when the SCSI RAID controller had no problem with the
overclocked PCI bus, but it's rock solid - has now been up for 87 days
continuously (I turned it off while on summer vacation).

My main system runs dual P3-S 1.4s @ 1470Mhz, 140Mhz FSB, on a P2B-DS
1.06 (P2B-DS can run one CPU at 150Mhz, but not two - the second CPU is
too far away from the chipset).

I am thinking around about RAM to CPU latency...... I take the liberty
to ask you something.
Does a lower Multiplier (i.e. X2) have a lower latency than a higher?
Maybe 133x2 gives me a better system-responsibility than 100x3!?
What would you say?

I'm not sure I understand the question, but memory throughput is a
bottleneck on P2B series boards running faster CPUs - so you want the
FSB as high as possible. RAM timings make very little difference to real
world performance, so it's better to run the RAM at CL3 than reduce the
FSB to run CL2.

My first Instance is a good and fast (stable)connection to the
ISA-Card. MIDI-Games etc. etc. Abandon etc.. ;-)
Only Windows95 (Best 3.1 Windows ;-)) is of matter. DOS is working so
and so (at all). Maybe I get VXD-Errors, when going with 133MHz!?

My systems mostly run XP, which is more demanding on the hardware. You
won't have any problems running older Windows at 133Mhz provided your
RAM is decent.

P2B

 

[Daniel Mandic]

P2B-S 1.04 is even better. My file server runs a Celeron 1A at
1.5ghz, 150Mhz FSB - so both CPU and motherboard are overclocked 50%.
I was a little surprised when the SCSI RAID controller had no problem
with the overclocked PCI bus, but it's rock solid - has now been up
for 87 days continuously (I turned it off while on summer vacation).

My main system runs dual P3-S 1.4s @ 1470Mhz, 140Mhz FSB, on a P2B-DS
1.06 (P2B-DS can run one CPU at 150Mhz, but not two - the second CPU
is too far away from the chipset).

Hi!


My Adaptec 2940 (U) did run on many machines, and 37.5MHz were always
possible. At 41 it did´nt find drives, cd etc. anymore.

I'm not sure I understand the question, but memory throughput is a
bottleneck on P2B series boards running faster CPUs - so you want the
FSB as high as possible. RAM timings make very little difference to
real world performance, so it's better to run the RAM at CL3 than
reduce the FSB to run CL2.

I say exactly the opposite.

Well, 150FSB is the best playground for any further processing. Now I
have 5/2 112MHz FSB x2.5= 280MHz P2 (Xeon - I say... as this beast
really have a zero latency on the 2nd Cache, half clocked)
It´s pretty fast with windows 95 . My 280SE Benz

I should try 150x2 with cl.2, which gives also the océd PCI (37.5) and
a 2/1 divider... faster than 5/2. But I am also already satisfied.

My personal testings concerning cl.2 cl.3, are done with ATARI´s
Neverwinter Nights. The KT133A behaved with Cl.2 much faster .... with
cl.3 it lagged more and did never (caching) get better.
No No, Cl.2 is a must . Especially like me, swapping merely kb´s and
bytes through the system. I don´t have to fullfill quests of
megatexturing, of 2-3MB the smallest etc etc..
But why should I wait more cycles for some kb´s. Cl.2 is brisker.
Well, in benchmarks you see no difference even if you would use
5-5-5-10 ;-). Better is 2-2-2-? (0.5?)

My systems mostly run XP, which is more demanding on the hardware.
You won't have any problems running older Windows at 133Mhz provided
your RAM is decent.

P2B

Yes, of course. Now I remember.... seemingly working sys´s, are
crashing with NT (blue-screen), at last. Thanks.





Best Regards,

Daniel Mandic