More P5B secrets uncovered

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11-05-2006, 10:18 AM
Revv23

Quote:

Originally Posted by tam2

hi all, pardon me for jumping in
Im curious bout this strap thing. Mr. Tony said that 400fsb has an added tweak. I already have bios settings that quite stable (SPI 32M & 3DMark 2005) @470 with P5B-D & E6300, and when i tried to boot @400 and clock it way up to 470 it seems there werent any improvement at all. I mean it gave me the same result as if i booted from 470fsb. But then i tried to boot @399 but it was very2 hard to keep it stable.
Any idea guys?

-tam2-

yup, the strap is already set a 400, the reason the board clocks so high is because of the looser timings past 400, which is why when you boot at 399 its hard to keep stable.
11-06-2006, 05:02 AM
ridczak

Quote:

Originally Posted by Revv23

yup, the strap is already set a 400, the reason the board clocks so high is because of the looser timings past 400, which is why when you boot at 399 its hard to keep stable.

Not 400 / 401 MHz? I saw it in many tests that strap switches at 401MHz (i.e. peformance @401 is lower than @400).
11-06-2006, 12:24 PM
ScottFern

Are most people using the 0804 bios? I am having an issue trying to use 4 SATA hard drives, and I am using the 0614 bios. Thinking this may help the issue.
11-06-2006, 02:50 PM
Revv23

Quote:

Originally Posted by ridczak

Not 400 / 401 MHz? I saw it in many tests that strap switches at 401MHz (i.e. peformance @401 is lower than @400).

i never tested personally but if he is clocking up to 470 from 400 then he is definetly on the higher strap already... unless hes got some high end vmch cooling with lots of volts.
11-09-2006, 09:42 AM
deadlock7

With 1066 strap (<400fsb and raise by windows) you can reach about 480-490.The differences are quite noticable..
11-09-2006, 10:12 AM
K404

what MCH volts are you using for that Deadlock? I cant remember exactly, but clockgenning past the 400 mark didnt get me anything like as far as that, 415? 425?
11-09-2006, 10:44 AM
Revv23

Quote:

Originally Posted by deadlock7

With 1066 strap (<400fsb and raise by windows) you can reach about 480-490.The differences are quite noticable..

Thats pretty hard to do without modded vmch for most...are you watercooled?
11-09-2006, 02:24 PM
deadlock7

Quote:

Originally Posted by Revv23

Thats pretty hard to do without modded vmch for most...are you watercooled?

Hmm..that's strange.I had two mobos that both do this.I used vmch 1.65 and did 32M at 485.I didn't gain a lot with vmch mod..

EDIT:I use the stock cooling at mch with ceramique.
11-09-2006, 02:36 PM
Viss

Up to 440 with CG for me, not a mhz more. Unmodded board.
11-09-2006, 02:39 PM
K404

thanks for the headsup then guys :)

oh...FWIW... my MCH voltage undervolts by 0.05 compared to BIOS (no mods....yet)
11-09-2006, 02:48 PM
Viss

And only 1:1 in me case, 4:5 is a no go. I remember i read somewhere this could be a certain mem timing but i cannot find the post anymore... Anyone?
11-09-2006, 02:50 PM
deadlock7

Give us a memset screenshot to help..
Off course i use pcie at 118(no more because i get raid corruption) that helps a lot.
11-09-2006, 02:58 PM
K404

the 4:5 divider on the P5B is a mess. I cant get it to play above 440x8 or 445x7, think its a board thing

Quote:

Originally Posted by deadlock

Off course i use pcie at 118(no more because i get raid corruption) that helps a lot.

PCI-E frequency helps FSB clocking?! I never thought of that! DOH.....
11-09-2006, 03:08 PM
deadlock7

Quote:

Originally Posted by K404

the 4:5 divider on the P5B is a mess. I cant get it to play above 440x8 or 445x7, think its a board thing

Are u sure that your memory can play around 550?I don't have problems with 5:4 either..:stick:

Quote:

PCI-E frequency helps FSB clocking?! I never thought of that! DOH.....

Try it..;)
11-09-2006, 03:20 PM
K404

My RAM is good to 590-600 ;)

A number of others have had trouble with 4:5, think theres a few other posts in this thread about it.

450+ 4:5 might be more work than e.g.
500+ 1:1
380+ 2:3 etc????

I`ll definately try the PCI-E frequency, thanks for the idea, no clue why I didnt make the connection! :D
11-10-2006, 12:28 AM
K404

Tried 4:5 with PCI-E at 115, couldnt CG past 415 :(. Will try 1:1 in a bit, hope that does better
11-10-2006, 04:35 AM
Dani

Quote:

Originally Posted by deadlock7

With 1066 strap (<400fsb and raise by windows) you can reach about 480-490.The differences are quite noticable..

Yeah and it's boosts nicely when you boot under 400FSB (1066)
We booted up with 398FSB and benched @ 533FSB :D
11-10-2006, 04:56 AM
funkflix

Strap change exactly on 401MHz. :)

Straight boot with 423MHz:
http://img241.imageshack.us/img241/7...t423mhzew2.jpg

Boot with 401MHz, pushed with SetFSB to 423MHz:
http://img241.imageshack.us/img241/2...upto423lm1.jpg

Boot with 400MHz, pushed with SetFSB to 423MHz:
http://img90.imageshack.us/img90/178...upto423yy9.jpg

My first P5B did 465MHz without mods on 1066 strap, but i'm on watercooling.
11-12-2006, 07:21 AM
GrimReaper

Quote:

Originally Posted by K404

My RAM is good to 590-600 ;)

A number of others have had trouble with 4:5, think theres a few other posts in this thread about it.

yup here it is
http://www.xtremesystems.org/forums/...d.php?t=122155
11-12-2006, 03:11 PM
Vito

So, the Abit AW9D-MAX, has strap options :'(

Is this the board you were talking about tony?

Will there ever be a strap option for P5B?

http://www.bit-tech.net/hardware/200...w9d_max/1.html
11-12-2006, 04:00 PM
Revv23

Quote:

Originally Posted by Vito

So, the Abit AW9D-MAX, has strap options :'(

Is this the board you were talking about tony?

Will there ever be a strap option for P5B?

http://www.bit-tech.net/hardware/200...w9d_max/1.html

The abit has a 1066 strap IIRC, but no 1333.
11-13-2006, 06:38 PM
shimmishim

sorry. late comer to this thread but...

are you saying that the reason why the p5b is clocking so well is actually a possible 1600 strap, rather than the 1333 strap?

and also... where is the switch occurring?

from what it looks like it happens between 400 and 401, is this correct?

so if i boot up at 400 and i clockgen up then i'll be using the 1066 strap.

if i boot up at 401 and i clockgen up then i'll be using the 1333 strap or 1600??? :)

thanks!
11-13-2006, 09:30 PM
Tony

We will have software soon with strap detection, this will show us exactly what is happening.

I have a feeling they are using both 1333 and 1600 straps
11-14-2006, 03:48 AM
K404

Quote:

Originally Posted by shimmishim

from what it looks like it happens between 400 and 401, is this correct?

so if i boot up at 400 and i clockgen up then i'll be using the 1066 strap.

if i boot up at 401 and i clockgen up then i'll be using the 1333 strap or 1600??? :)

thanks!

spot on. Maybe for clockgen clocking, try booting at 395, just to be sure. When I first got the board, booting between 398 and 402 was a write-off for me, was like a no-mans land, tho I think more MCH volts help
11-14-2006, 04:27 AM
torahtrance

newb Q's

hey guys I am new to this whole OC system but I am a techie in general, got P5B deluxe + Zalman water cooling and e6600... the RAM is just standard 667 PNY 2gb in dual channel...

I am learning a lot about overclocking but there are some basics im missing what exactly is this strap?? I know the FSB is standard at 1066... I wanna play around with this monster computer I have here...

So can u guys toss me some links to get up to par? this thread is very interesting from what I can understand tho :)

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