Unable to Boot w/ PAT on P4P800D

[Ken Fox]

Hi,

I've posted in an earlier thread about trying to OC my P4P800Deluxe, which
contains a P4c 2.6GHz CPU plus a couple of 512MB sticks of the cheapest
PC3200 Corsair Ram run in dual channel mode. I've not had a problem
attaining a stable error free OC with a FSB of 220 (freq=880, e.g. 10% OC)
which includes not only the CPU but also the RAM, (ratio of 1:1) which
currently runs at DDR440. >30 passes of Memtest86 have confirmed error free
performance at this level. I've not had any excessive temps, either.

In the process of trying out some suggestions others on this board have
made, I've tried to enable PAT but the machine will not boot. I realize PAT
is disabled if you are set for OC'ing, but the PAT won't work even when the
machine is run at stock speeds with FSB=200 (800), CPU:RAM ratio of 1:1
(e.g. stock settings all the way). When I try to boot with PAT enabled the
machine will not post, period; the first time after I change it nothing
happens, then after a hard reset it boots into the bios with tagline of
"Overclocking Failed," with the option screen many here may be familiar
with.

My bios level is 080009 dated some time in November. Granted, I could flash
the bios and I may end up doing that in an attempt to accomplish the OC with
PAT enabled as referenced by Gene in an earlier thread, but I am somewhat
surprised that even at stock settings the dog won't hunt, so to speak.

Any suggestions or observations?

Thanks,

ken

 

[Splitskull]

I got the same problem with bios 1012 or 1014 now. It worked fine with 1012
but after I flesh to 1014 now it doesn't work anymore. It doesn't matter if
I downgrade to 1012 anymore. It won't boot with PAT enabled. Everything is
on auto. Is there an asus forum?

--

------Splitskull-----

| Hi,
|
| I've posted in an earlier thread about trying to OC my P4P800Deluxe, which
| contains a P4c 2.6GHz CPU plus a couple of 512MB sticks of the cheapest
| PC3200 Corsair Ram run in dual channel mode. I've not had a problem
| attaining a stable error free OC with a FSB of 220 (freq=880, e.g. 10% OC)
| which includes not only the CPU but also the RAM, (ratio of 1:1) which
| currently runs at DDR440. >30 passes of Memtest86 have confirmed error
free
| performance at this level. I've not had any excessive temps, either.
|
| In the process of trying out some suggestions others on this board have
| made, I've tried to enable PAT but the machine will not boot. I realize
PAT
| is disabled if you are set for OC'ing, but the PAT won't work even when
the
| machine is run at stock speeds with FSB=200 (800), CPU:RAM ratio of 1:1
| (e.g. stock settings all the way). When I try to boot with PAT enabled
the
| machine will not post, period; the first time after I change it nothing
| happens, then after a hard reset it boots into the bios with tagline of
| "Overclocking Failed," with the option screen many here may be familiar
| with.
|
| My bios level is 080009 dated some time in November. Granted, I could
flash
| the bios and I may end up doing that in an attempt to accomplish the OC
with
| PAT enabled as referenced by Gene in an earlier thread, but I am somewhat
| surprised that even at stock settings the dog won't hunt, so to speak.
|
| Any suggestions or observations?
|
| Thanks,
|
| ken
|
|

 

[Eric]

May sure "serial presence detect" is set to auto.

Make sure performance mode is set to "auto"

I assume you are trying to enable PAT by turning on Memory Acceleration?

 

[Tator Totor]

Splitskull,


Yes, see on www.abxzone you've got there most popular Asus users forums...

you clic on:

http://www.abxzone.com/forums/forumdisplay.php?s=7c88621ed6716fefe3d9cd9afb0
a6e29&forumid=41


and/or (same with reduced minilien) at

http://minilien.com/?8oTxsagTLi

 

[Ken Fox]

May sure "serial presence detect" is set to auto.

Make sure performance mode is set to "auto"

I assume you are trying to enable PAT by turning on Memory Acceleration?

Hi Eric,

I went back through the settings and changed 2 of the 3 above to what you
described. The result was that the machine DID boot into performance mode.

I reran all the benchmarks I've been using from Sandra and compared to what
I've been getting with a 10% OC (220FSB on both CPU and RAM), the new
benchmarks with Performance Mode "on" (but no OC), were in general a little
worse than with Perf. Mode "off" and OC on. For example, the Arithmetic
Benchmark was 10029 (PAT) vs. 10911 with OC; CPU MM Benchmark was 34576
(PAT) vs. 37968 (OC); Memory Bandwidth combined index 8152 PAT (slightly
better than) OC=8067.

Maximum Memory Bus Bandwidth was 6400MB/s with the PAT and 7040MB/s with OC.

"Bandwidth Efficiency," however was 63% with PAT and 56% with OC (estimated
values).

Finally, under Performance Rating for the CPU, the result was PR2867 with
PAT vs. 3145 with OC and no PAT.

Exactly how any of this translates into real world performance is anyone's
guess. Probably the best solution if it can be made to work on a given
system is the "Big Toe" mod suggested by Gene, but this involves monkeying
with the Bios several times and if that went poorly your system could be
dead!

Any thoughts you or anyone else has on this are most welcome, as before!
For now, I think I'm better off with the very stable 10% OC than with OC off
and PAT on.

rgds,

ken

 

[Eric]

Well I would try it with performance mode set to either "standard" or
"turbo" and memory acceleration "enabled" (no overclocking) and see what you
get too.

As far as PAT -- both Memory Acceleration and Performance Mode (when set to
"standard" or "turbo") turn on PAT. Thus, there are two ways to turn on
PAT:

1. Enable memory acceleration in bios

2. Set performance mode to either "standard" or "turbo"

Either or both of the above will enable PAT (assuming no overclocking).

However, number 2 also messes with your memory timings (tries to make them
tighter).