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Asus P5B Deluxe Interesting Settings Result

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Luie

Member
Joined
Sep 6, 2001
Location
Irvine, CA
Special note
I just got this motherboard a few days ago: rev. 1.03G. After 20+ hours of testing, I have found:
There is no (or barely if any) performance gain with using 8 pin power to the 12V than using 4 pin.
Corsair ValueRAM PC2-4300 RAM works well, way better than expected.
OCZ's PC2-5400 EL Dual CH Gold Edition GX XTC does not work on tried BIOSs (versions 0204, 0804, 0910)

BIOS version used were 0804 (from Asus webpage) and 0910 (from http://starjojotrek2.free.fr/BIOS/)
There is an advantage of 7 FSB more (+1.7%) for using BIOS version 0910 (418 FSB max stable) over BIOS version 0804 (411 FSB max stable).


Summary
I got maximum stable FSB with:
RAM settings = 5-5-5-15 6-42 3-11-5-14

Vdimm = 1.95V
Vcore = 1.3375V
NB = 1.55V
SB = 1.50V
ICH = Auto
FSB termination voltage (aka. Vtt?) = 1.40V


Detailed analysis
Vdimm = 1.95V
If 1.90V, FSB lowers by 5 (-1.2%)
If 2.00V, FSB stays the same (0%).

Vcore = 1.3375V
If 1.35V, FSB lowers by 1 (-0.24%)
If 1.40V, FSB lowers by 2 (-0.48%)
If 1.325V, FSB lowers by 2 (-0.48%)
If 1.300V, FSB lowers by 2 (-0.48%)

NB = 1.55V
If 1.65V, FSB lowers by 2(-0.48%)
If 1.45V, FSB lowers by 40 (-9.6%) <- relatively big drop
If 1.25V, FSB lowers by 48 (-11.5%)

SB = 1.50V
If 1.60V, FSB stays the same (0%).

ICH = Auto
If 1.057V, FSB stays the same (0%).
If 1.215V, FSB lowers by 3 (-0.72%). <- sometimes does not POST

FSB terminate = 1.40V
If 1.45V, FSB lowers by 5 (-1.2%)
If lowerV, FSB *To Be Announced* (forgot to do an experiment for this)


Future
Future tests with PC2-6400 or above hopefully.
Any comments/advice/tips/suggestions welcome.
 
Last edited:
Thanks for sharing Luie. Got my commando last week & am just building up ocing experience on conroe, coming from amd. currently 24/7 @ 356x9. your findings particularly the voltage ones around fsb etc., will be useful guides.
 
You have awesome specs there. O.O
(I wonder if RAM prices will fall after Vista comes out) :-(
RAM prices would probably jump very high just before it comes out.
Just speculating...
 
Thanks Luie, took a lot of saving scheming & xmas came late(asked 4 the £:D), but yes im pleased with it.

I started planning this upgrade last august & whilst the £ of most components have come down marginally think ram has gone up. Think with ddr2 it's just the volume of new demand from pps upgrading from 939 & DDR rigs to conroe or am2. They say a new os launch promotes pc dsales, so can't see £ coming down soon i'm afraid.

luck:)
 
Great post there luie.

I've been experimenting like yourself for the past couple of weeks but not as meticulous with my notes I'm afraid.

I have just put together an E6400 and P5B-Dlx watercooled combo with a Corsair 2Gb 6400C4D kit (expensive bit relatively and took a few gulps to press the “buy” button :eek: ).
Coming from AMD Bartons I had a lot of reading around to do, including the strap guides about this mbd (like this one.......http://www.thetechrepository.com/showthread.php?t=30).

Once I got used to the P5B’s quirks (including false starting) and the “FSB Gap” at 360-399 MHz I’m very happy with this setup and the o/c is amazing (once past 401fsb the fun begins :beer: ).

I've stuck to the 910 bios for now because a few comments here put me off the 1004.
 
Awesome specs.

Thanks for the link. I haven't came across that thread before. O.O
Might learn something new. :)
Thanks.
 
I've had better success with my northbridge at 1.45v, getting up to 400 so far. At 1.25v though, I couldn't get it past around 320. Amazing what a little extra voltage can do.
 
Luie said:
Awesome specs.

Thanks for the link. I haven't came across that thread before. O.O
Might learn something new. :)
Thanks.

Loads more............

http://www.xtremesystems.org/forums/showthread.php?t=115765

http://www.thetechrepository.com/forumdisplay.php?f=7

http://www.thetechrepository.com/forumdisplay.php?f=15

http://www.bleedinedgesupport.com/ocz/forum/showthread.php?t=22297

http://www.overclock.net/intel-cpus...g.html?highlight=Intel+Overclocking+Redefined

(My NB is at 1.55 24/7 with cpu @ 490x8 1.45 Vcore with the Apogee watercooler, into windows but not yet tested)
 
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