Argghhh! Please help me unlock the high multipliers on my 1700+

[zephyrprime]

So I got a 1700+ yesterday but how exactly do I unlock the high multipliers on this thing? I have a 8kha+ and it's multipliers only go up to 15x. For some reason, only multipliers up to 14x work for some reason. And yes, I have the most recent BIOS. I've already tried John Carr's website and I find that place extremely confusing. I've also tried searching the web too but I got mostly irrelevent information.

I tried blowing the 5th L3 bridge to enable the high multiplier range but that caused my computer to not start at all. Apparently it's because the multiplier encoded on a 1700+ after the 5th L3 bridge is open is reserved for mobile processors. So I then tried blowing the 3rd L3 bridge per the recommendating on John Carr's website and that restored my computer to life but I'm still unable to access high multipliers and now I have the added problem that only multipliers up to 12.5x work! So what's the deal? Do I have to do some sort of wire mod? Am I up the creek? I'm very frustrated right now.

Oh, I've got the revision 1.3 board, not the 2.0.

 

[ChampionAtTufshop]

i chopped up the last 3 to get higher mults to work for mine

 

[zephyrprime]

i chopped up the last 3 to get higher mults to work for mine

Does that let you access all the higher multipliers or only one multiplier?

 

[ChampionAtTufshop]

all of the ones selectable on my a7v (kt133 chipset)

 

[zephyrprime]

Is there any more information I can get on what you did anywhere on the web? Is there anything special about the three bridges you opened?

 

[ChampionAtTufshop]

whatever's at johncars website is all i read

it will "default" to a mult of 15x i believe, but aftrwards you can mess with mults all you want

 

[johncar]

Originally posted by: zephyrprime
So I got a 1700+ yesterday but how exactly do I unlock the high multipliers on this thing? I have a 8kha+ and it's multipliers only go up to 15x. For some reason, only multipliers up to 14x work for some reason. And yes, I have the most recent BIOS. I've already tried John Carr's website and I find that place extremely confusing. I've also tried searching the web too but I got mostly irrelevent information.

I tried blowing the 5th L3 bridge to enable the high multiplier range but that caused my computer to not start at all. Apparently it's because the multiplier encoded on a 1700+ after the 5th L3 bridge is open is reserved for mobile processors. So I then tried blowing the 3rd L3 bridge per the recommendating on John Carr's website and that restored my computer to life but I'm still unable to access high multipliers and now I have the added problem that only multipliers up to 12.5x work! So what's the deal? Do I have to do some sort of wire mod? Am I up the creek? I'm very frustrated right now.

zephyr,
"I've already tried John Carr's website and I find that place extremely confusing." But you managed to blow the 5th L3 and "understand" about the mobile/reserved "no boot" issue, as well as the recommendation to open the middle L3.

Suggest you also read about the "no boot" issue in the 13X thru 14.5X range, (except maybe default or hard modded setting does boot in 'Auto" mode). You'll see that the FID signals to Northbridge/system timing issues may be involved and there's no easy workaround yet. The one we suggested didn't work for KF.

Try this, if only to eliminate it. Set 8X less than you want in bios, but leave the 5th L3 open...middle L3 can also stay open., ie, set 6X for 14X, 7X for 15X, stay away from 14.5X and 15.5X as they remap to 21X and 22X...too high. If that doesn't work, then only current recourse is to hard mod the L3s...as far as we know now.

And don't be so hard on the article, understand that it's the "combination of circumstances" that makes Multiplier setting so complex...we are only the messenger. Nobody ever said life was a bed of roses.;-)
John C.

 

[zephyrprime]

Try this, if only to eliminate it. Set 8X less than you want in bios, but leave the 5th L3 open...middle L3 can also stay open., ie, set 6X for 14X, 7X for 15X, stay away from 14.5X and 15.5X as they remap to 21X and 22X...too high. If that doesn't work, then only current recourse is to hard mod the L3s...as far as we know now.

Yeah, I tried that technique before after learning about in an old thread here. It didn't work for me. 6x and 7x only gave me 6x and 7x.

I don't mean to be disrespecting your site. It is by far the most informative I've found on the web but it's also confusing.

 

[KF]

> It didn't work for me. 6x and 7x only gave me 6x and 7x.

Likely your motherboard has the pin permanently set low that sets the 5th bridge. To get around that, what should work is opening the 5th L1. Then your mobo can't make it low.

You might need a voltage boost to boot at all with the high multipliers. Some mobos (like ASUS) automatically drop back to a "default" when a boot fails, without notifying you. That can be very confusing.

I have to say that I understood johncar's site well enough. It is putting it all together and figuring out what applies to yourself that takes a lot of figuring. There is "more than you ever wanted to know." That's good. Elsewhere there usually there isn't enough info.

 

[zephyrprime]

Some mobos (like ASUS) automatically drop back to a "default" when a boot fails, without notifying you. That can be very confusing.

Something like that happens with my board too. I've set the multiplier on my chip to 13 which my board only understands as 6. However, on occasion, the board will not boot at all. On these occasions, I can get things to work by wimply pressing reset. For some reason, this causes the board to boot with a multiplier of 13x.

 

[ChampionAtTufshop]

so youve chopped the last 3 bridges?

 

[KF]

> I then tried blowing the 3rd L3 bridge

Did you blow it with a battery or what?

>only multipliers up to 12.5x work

Have you tried them all? Do they all give you the expected speed when you boot?

>6x and 7x only gave me 6x and 7x
How about 5x?
If you are using an FSB of 133, 13x would give you 1729MHz. Set the FSB to 100 until you get the mutlpliers working right.

>I've set the multiplier on my chip to 13 which my board only understands as 6

Very strange.

12345 bridge
CCOCO = 13x
COOCC = 6x ???
CCOCC = 5x would make sense.

>On these occasions, I can get things to work by simply pressing reset. For some reason, this causes the board to boot with a multiplier of 13x.

The only way it might get 13x would be from the multiplier on the CPU, so this confirms the bridges are set to 13x. I think the mobo must just leave the multiplier alone in this case, which gives you 13.

I still think your motherboard might be setting the 5th bit low. If you lock the 5th bit by opening the 5th L1, it won't be able to.

 

[zephyrprime]

Very strange.

12345 bridge
CCOCO = 13x
COOCC = 6x ???
CCOCC = 5x would make sense.

Wait, you're right. It's going to 5 not 6. I was messing up my math. 666/133=5 not 6 (whoops!).

Did you blow it with a battery or what?

Yes.

Have you tried them all? Do they all give you the expected speed when you boot?

I've tried several multpliers and they give the expected speed except for 13x, 14x, and 15x. 13x give 12.5x. 14x & 15x give 5x. This is a common problem from the looks of things over at the amdmb forums.

I still think your motherboard might be setting the 5th bit low. If you lock the 5th bit by opening the 5th L1, it won't be able to.

It really does seem like the MB is setting the 5th bit low no matter what. I'll have to give it a try. First I'll have to try some FSB overclocking though. Wish me luck!

 

[zephyrprime]

so youve chopped the last 3 bridges?

No, only bridge 3 & 5. I'm not convinced that cutting the 4th bridge would do anything.

 

[ChampionAtTufshop]

Originally posted by: zephyrprime

so youve chopped the last 3 bridges?

No, only bridge 3 & 5. I'm not convinced that cutting the 4th bridge would do anything.

well it did for me
on both my old a7v and my new a7n8x (without the bios that unlocks all mults...i think it was 1001E ) i was only able to get 13x and higher...
anything lower would result in not posting

this was on an xp1700+ tbred b JIUCB 0251
now that i've got the new bios 1002.A it unlcoks all mutls...but thats not exactly relevant lol