XP 1700+ MAX mult. 12.5x on 8RDA+???

[HaVoC]

I have an 8RDA+, 2 x 256MB Crucial PC2100 running at 2 x 150 Mhz and a T-bred "B" 1700+. It seems in the BIOS (version 12/10/2002) my max useable multiplier is 12.5x. The BIOS does allow me to change the mult. past 12.5, but then it reverts back down to lower mults on POST. I've tried all multipliers to 24x and I can't get it past an actual multiplier of 12.5. Is there no way for me to take the mult. farther without further increasing my FSB? I was under the impression that NForce2 boards treat T-bred "B" as factory unlocked processors without any L1 bridge modifications. Or am I stuck at this max multiplier and have to increase the FSB?

 

[adeno]

Since you have a lower end Tbred (xp1700+), only the lower multipliers are unlocked (12.5x and lower). If you had the higher end Tbred (xp2100+) the upper multipliers are unlocked (13x and up).

IIRC, if you want the upper multipliers you will need to modify one of the L3 bridges (the last one). That's the only way I remember

Otherwise, you have no other choice but to use 12.5x as your max and just increase the fsb as much as you can.

 

[m1ke101]

Originally posted by: adelacru
Since you have a lower end Tbred (xp1700+), only the lower multipliers are unlocked (12.5x and lower). If you had the higher end Tbred (xp2100+) the upper multipliers are unlocked (13x and up). IIRC, if you want the upper multipliers you will need to modify one of the L3 bridges (the last one). That's the only way I remember Otherwise, you have no other choice but to use 12.5x as your max and just increase the fsb as much as you can.

really? for some reason i can use the 13x multiplier on my 8k3a and 1700+

 

[adeno]

Originally posted by: m1ke101

really? for some reason i can use the 13x multiplier on my 8k3a and 1700+

Hmm.. maybe it all depends on the motherboard? I have the xp1700+ and have a maxed multiplier with my 8RDA+ at 12.5x

 

[HaVoC]

Otherwise, you have no other choice but to use 12.5x as your max and just increase the fsb as much as you can.

Crap...I was hoping there's a way around that. I don't know how far my Crucial PC2100 can go...a lot of people are hitting 166 DDR, but some are maxing out at ~155 Mhz.

Is it possible a BIOS upgrade will fix this issue? Can anyone confirm hitting higher than 12.5x on 8RDA+ / XP 1700+ "B"?

 

[johncar]

Originally posted by: HaVoCCrap...I was hoping there's a way around that. I don't know how far my Crucial PC2100 can go...a lot of people are hitting 166 DDR, but some are maxing out at ~155 Mhz.

Is it possible a BIOS upgrade will fix this issue? Can anyone confirm hitting higher than 12.5x on 8RDA+ / XP 1700+ "B"?

This has worked in the past..."open" the rightmost/5th L3 which controls the 8X Bit Value signal bus. That will enable it, set it HI.
Then depending on you mobo, you might be be able to "set and get" higher Multipliers in the 13X and up range. If that doesn't work, then set 8X LESS than you want in the bios and see what happens. Theory is that some mobos are unable to cope with/manipulate that 8X signal bus, so opening its L3 bridge manually does what the mobo/bios apparently can't.

As for experience, it has worked in the past, and just recently "Bowman" opened the 5th L3 on his 2600 12.5X166 and was then able to set 13X 14X 15X 16X even 20X(100MHz) which is an AMD undocumented/"Reserved" setting. He did this all on an 8rda, so we'd say you have a good chance.
And "Soulkeeper" got to 24X with a 1700 Tbred on an A7VKT133, posted right here at Anand's.
John C.

 

[Sushi]

Does anyone know if the following processor is a TBred A or B?

AXDA1800DLT3C

It was either AUIGA or AIUGA Stepping, but I would have to pull it out to make sure...

I cannot seem to get any other multipliers to work on my ASUS A7N8X mobo... I bought the processor as factory unlocked, but changing the multiplier in the BIOS has no affect on the processor???

Any Ideas?

 

[Dracos]

Originally posted by: johncar

Originally posted by: HaVoCCrap...I was hoping there's a way around that. I don't know how far my Crucial PC2100 can go...a lot of people are hitting 166 DDR, but some are maxing out at ~155 Mhz.

Is it possible a BIOS upgrade will fix this issue? Can anyone confirm hitting higher than 12.5x on 8RDA+ / XP 1700+ "B"?

This has worked in the past..."open" the rightmost/5th L3 which controls the 8X Bit Value signal bus. That will enable it, set it HI.
Then depending on you mobo, you might be be able to "set and get" higher Multipliers in the 13X and up range. If that doesn't work, then set 8X LESS than you want in the bios and see what happens. Theory is that some mobos are unable to cope with/manipulate that 8X signal bus, so opening its L3 bridge manually does what the mobo/bios apparently can't.

As for experience, it has worked in the past, and just recently "Bowman" opened the 5th L3 on his 2600 12.5X166 and was then able to set 13X 14X 15X 16X even 20X(100MHz) which is an AMD undocumented/"Reserved" setting. He did this all on an 8rda, so we'd say you have a good chance.
And "Soulkeeper" got to 24X with a 1700 Tbred on an A7VKT133, posted right here at Anand's.
John C.

Ok now how did he do that on the A7V...or is that the A7V133??? I have the A7V133 and the highest multiplier I can hit before the 1700 clocks down to the lower multi's is 12.5

 

[Sushi]

I can't get ANY multipliers to work... Whether they be higher or lower!!! I am frustrated. Humph!

How would I go about modifying the L3 bridges? What is the 8X HI 8X low business all about? Is that something that I have to set in the BIOS?

Felling kinda stupid here...LOL

HELP!

Thanks!

 

[KingofFah]

I posted about this before, since a lot of people were claiming that the tbreds (even the lower ones) had all mults allowed by default on the 8rda. I bought the mobo and a tbred to find out for myself, and it turned out that they were not all enabled.

 

[johncar]

Originally posted by: Dracos

Ok now how did he do that on the A7V...or is that the A7V133??? I have the A7V133 and the highest multiplier I can hit before the 1700 clocks down to the lower multi's is 12.5

Keeping track of people and systems is not easy. We said Bowman did his thing on an8rda, which is what HaVoC is coping with...neither have an A7V of any model...though Soulkeeper managed to get all Multis thru the Remapped "Reserved" 19X thru 24X settings on a 1700 on an a7vkt133, and believe L34n3R confirmed 20X for a Remapped "Reserved" setting. So the "workaround" of cutting the 5th L3 to set the 8X Bit Value signal circuit HI...then setting the 1st 4 bits using jumpers in the low 5X thru 12.5X...to get a combination of 5 bits in the high range..."worked" for SoulKeeper and L34n3R. But there must be so much variation in systems considering the number of mobo mfrs and their bios revisions...what works for one doesn't seem to for another, and extremely difficult to "keep score".

You can check Soulkeeper's posts in this forum, believesubject starts with "24X...."
John C.

 

[kodi]

You may want to try the same techniques used for the A7V:
http://www.a7vtroubleshooting.com/forum/cgi-bin/yabb/YaBB.pl?board=tweaking;action=display;num=1042602987
This has worked for me.

 

[Sushi]

Update Got my multipliers working. Looks like I just needed a little BIOS Flash...

12.5 X 133

 

[johncar]

HaVoC et al,
Here's another suggestion...open the 5th L3, but also ground the AJ27 socket pin (the wire trick), and open the 5th L1. Theory for this idea goes like this...

Some mobo/s currently do not respond to the "open 5th L3" mod. So perhaps we can fool them. Doing the wire trick grounds the 5th L3 8X Bit Value signal circuit (which is already grounded on a 1700) and so the system allows only 5X-12.5X Multipliers. But when the 5th L3 is opened and the 5th L1 is also opened, then the 8X BV is Enabled/set HI but it is also "isolated" from the mobo by the open 5th L1. So the system still thinks it's looking at a "closed" 5th L3, and so should still respond with settings in the 5X-12.5X range.

Now set 8X LESS than you want in the user-defined option of bios, like say set 6X if you want 14X. Then hopefully the system resets the 1st 4 bits of Multiplier code to 6X, BUT with the 5th L3 still open (bios is unable to reset it LO for 6X even if it tried cause of the open 5th L1), 8X gets added to the 6X = 14X.

The difference to "just opening" the 5th L3 is that now the Mobo/system will be told (if it's reading the 5th L3), that the 5th L3 is still LO, while it is actually HI...and this just might "workaround" whatever is preventing getting 13X and up when just the 5th L3 is opened. Worth a try??

But if you try it, 8X HI and others LO = a 3X setting for Mobile CPUs which might not post. So get into the bios asap before not posting and make the desired 8X less setting.
John C.

 

[bgeh]

Originally posted by: Sushi
Does anyone know if the following processor is a TBred A or B?

AXDA1800DLT3C

It was either AUIGA or AIUGA Stepping, but I would have to pull it out to make sure...

I cannot seem to get any other multipliers to work on my ASUS A7N8X mobo... I bought the processor as factory unlocked, but changing the multiplier in the BIOS has no affect on the processor???

Any Ideas?

it's a T-Bred A

 

[Sushi]

Thanks

 

[HaVoC]

Here's another suggestion...open the 5th L3, but also ground the AJ27 socket pin (the wire trick), and open the 5th L1. Theory for this idea goes like this

Thanks for the suggestion...a new BIOS just came out for the 8RDA+ so I am going to try that first. I'd rather not take off my HSF since I've got the SLK-800 on there and I'm getting good temps now. Don't wanna mess with a good thing not to mention all the hassle.

I have to think the 8RDA+ is targeted as an "overclockers" mobo so it should support all multipliers for unlocked T-bred "b"s. At this point it seems to be a BIOS issue. Will report back to the thread with the results.

 

[HaVoC]

UPDATE: Upgraded to 1/29/03 BIOS on my 8RDA+...still no luck! It frustrates me to read about others unlocking ALL multipliers for 1700+s on older mobos. I thought NForce 2 was supposed to be the best. Come on EpoX!.

Either I will have to try to creep the FSB/Memory upwards towards 166 Mhz or I have to pull my CPU out and open the last L3 bridge.