AMD OC using FSB or Multiplier?

[Turk]

Well me again. Now my AMD athlon XP 1800+ works like a charm, and I can use FSB or Multipler OC. AGP and PCI is locked (pending from 30-37Mhz). So the question is which one should one use, FSB or Multiplier? I'm now using 14X instead of the original 11.5X Unfortunately almost none FSB OC is working now the best I can get seems to be 14*135=1890 or I can go with the original 11.5*159=1828. Multipliers 8 to 14 except 9 and 12 is working!
Temp is at load about 50c and the voltage I use at the moment is 16.5V, originally 1.5V.

Any suggestions?

And as allways thanks guys!

Turk

 

[umheint0]

Said before, and I'll say it again. Multipliers are split into the 5.0x-12.5x and 13.0x + categories. To access one set or the other requires a physical modification to the CPU.

In your case, it involves cutting the last L3 bridge on your CPU to get the higher multipliers, as I've been told. I've never been stupid enough to try it, though some have, I've been told.

umheint0's phat setup --> <A HREF="http://home.cc.umanitoba.ca/~umheint0/system.html" target="_new">http://home.cc.umanitoba.ca/~umheint0/system.html</A><--

 

[Stain]

Are you sure thats true for all XP's? Or just Bartons?

 

[umheint0]

I am positive it is for all XP CPUs. It is a limitation of the XP core.

The multiplier is sent to the CPU as a four-bit character. This only allows 16 different multipliers to choose from. To get higher multipliers, something else needed to change, again doubling the number to 32. This happened to be the L3 bridge on the CPU. It needs to be connected for lower multipliers and cut for higher ones.

If your CPU is stock with a multiplier of 12.5 or less, it falls in the smaller category, requiring the L3 bridge to be cut to get access to only the higher multipliers, and vice versa if the stock multiplier is 13.0 or greater (actually, there is a wire trick that involves connecting two of the pins on the back of the CPU. Pretty bloody hard to do, too.)

umheint0's phat setup --> <A HREF="http://home.cc.umanitoba.ca/~umheint0/system.html" target="_new">http://home.cc.umanitoba.ca/~umheint0/system.html</A><--

 

[speeduk]

This may suprise you but i have ALL multipliers available to me on my 2100xp tbred B. I have the epox 8rda3+ and it lets me use any one i want.

2100xp @ 2.24ghz
2x512mb 3200
ATI 9700 pro

 

[umheint0]

I never said you couldn't SELECT them in the BIOS, it just means it won't be enabled. If you select, say, 13.0x, it will actually only be selecting 5.0x.

umheint0's phat setup --> <A HREF="http://home.cc.umanitoba.ca/~umheint0/system.html" target="_new">http://home.cc.umanitoba.ca/~umheint0/system.html</A><--

 

[svol]

No it is only for T-breds and Bartons... the Palomino uses a different type of multiplier setting (4 L3 bridtges instead of 5).

My CPU fan spins so fast that it creates a wormhole

 

[svol]

Not true... in some cases nForce2 boards are known to override the pin settings and give you the ability to change them to everything you want.

My CPU fan spins so fast that it creates a wormhole

 

[svol]

Hmmm... first place your multiplier at stock and start increasing the FSB till it wont go further... if needed lower the multiplier. FSB overclocking gives always more performance then multiplier OC'ing unless you slow down the memory timings.

My CPU fan spins so fast that it creates a wormhole

 

[umheint0]

Well, there are different settings to adjust Palominos to give the higher multipliers.

And about the pin overriding - I have not found a motherboard capable of that yet. Got names, or pages with proof?

umheint0's phat setup --> <A HREF="http://home.cc.umanitoba.ca/~umheint0/system.html" target="_new">http://home.cc.umanitoba.ca/~umheint0/system.html</A><--

 

[svol]

Yes, but Palomino's have access to all multipliers when unlocked, they don't need fifth L3 pin braking because there simple enough isn't a 5th L3 pin.

And yes if you do some searching around here you can find people that have succesfully used all multipliers on nForce2 boards from Epox, Asus, Abit and MSI.

My CPU fan spins so fast that it creates a wormhole

 

[umheint0]

I have an Asus, and I know for a fact it only has 4-bit multiplier addressing. Same with the Epox.

umheint0's phat setup --> <A HREF="http://home.cc.umanitoba.ca/~umheint0/system.html" target="_new">http://home.cc.umanitoba.ca/~umheint0/system.html</A><--

 

[speeduk]

Im currently running at 11x204 on a 2100 that should only have the 13 and higher multipliers available because the 8rda3+ unlocks them all.

2100xp @ 2.24ghz
2x512mb 3200
ATI 9700 pro

 

[svol]

Check it... read the first reviews, read old threads. There are people that have access to all multipliers with nForce2 boards.

My CPU fan spins so fast that it creates a wormhole

 

[Turk]

Hi! thanks for the advice but I CAN use multiplier 14! Only that I can't raise Vcore to more than 1.7V I can also use multipliers down to 8! Haven't done anything with the CPU.

I'll now try to raise the FSB instead of the multiplier! (thanks SVOL) Ofcourse I would like to be able to use 14X multi with some FSB OC but that dosen't seem to be reachable.

Anyway thanks guys.

 

[umheint0]

Never said you couldn't just that it would detect at 6x instead of 14x. Check WCPUID to see the true cpu speed.

umheint0's phat setup --> <A HREF="http://home.cc.umanitoba.ca/~umheint0/system.html" target="_new">http://home.cc.umanitoba.ca/~umheint0/system.html</A><--

 

[svol]

You still don't beleive some people can select multipliers that are not in the multiplier range of their CPU with nForce2 boards? Read Speeduk's reply?

*sigh*

My CPU fan spins so fast that it creates a wormhole

 

[Turk]

I did as you suggested and well, you are wrong!

WCPUID: (copy to clipboard, nothing altered)


[ WCPUID Version 3.1a (c) 1996-2002 By H.Oda! ]

Processor #1 : AMD Athlon XP (Model 8) / 26460086
Platform : Socket A (Socket 462)
Vendor String : AuthenticAMD
CPU Type : Original OEM Processor (0)
Family : 6 (7)
Model : 8 (8)
Stepping ID : 0 (0)
Brand : ----
APIC : ----
HT Log.CPU Cnt : ----
Name String : AMD Athlon(TM) XP 1800+

Internal Clock : 1857.54 MHz
System Bus : 265.36 MHz DDR
System Clock : 132.68 MHz
Multiplier : 14.0

L1 I-Cache : 64K Byte
L1 D-Cache : 64K Byte
L1 T-Cache : ----
L1 Cache : ----
L2 Cache : 256K Byte
L2 Speed : 1857.54 MHz (Full)

MMX Unit : Supported
SSE Unit : Supported
SSE2 Unit : Not Supported
MMX2 Unit : Supported
3DNow! Unit : Supported
3DNow!+ Unit : Supported

Host Bridge : 1106:3189.00 [VIA Apollo KT400]
South Bridge : 1106:3177.00 [VIA VT8233A]
VGA Device : 1002:4966.01 [ATI RADEON 9000 Series]
Memory Size : 512M Byte
Memory Clock : ----

OS Version : Windows XP Version 5.01.2600 Service Pack 1
-------------- : -----------------------------------
StdFunc 0 : 00000001 68747541 444D4163 69746E65
StdFunc 1 : 00000680 00000000 00000000 0383FBFF
ExtFunc 0 : 80000008 68747541 444D4163 69746E65
ExtFunc 1 : 00000780 00000000 00000000 C1C3FBFF
ExtFunc 2 : 20444D41 6C687441 54286E6F 5820294D
ExtFunc 3 : 38312050 002B3030 00000000 00000000
ExtFunc 4 : 00000000 00000000 00000000 00000000
ExtFunc 5 : 0408FF08 FF20FF10 40020140 40020140
ExtFunc 6 : 00000000 41004100 01008140 00000000
ExtFunc 7 : 00000000 00000000 00000000 00000001
ExtFunc 8 : 00002022 00000000 00000000 00000000
C0010015h : 00000000 060B1008 00000000 823A14C8
C0010016h : 00000000 00000000 00000000 823A14C8
C0010017h : 00000000 00000000 00000000 823A14C8
C0010018h : 00000000 F0000018 00000000 823A14C8
C0010019h : 0000000F F8000800 00000000 823A14C8
C001001Ah : 00000000 20000000 00000000 823A14C8
C001001Bh : 00000000 60031223 00000000 823A14C8
C0010111h : 00000000 000A0000 00000000 823A14C8
C0010112h : 00000000 00000000 00000000 823A14C8
C0010113h : 0000000F FFFE0001 00000000 823A14C8

##--- Date 06/17/2003, Time 13:45:51

 

[umheint0]

There's something more I can appreciate. Emprical evidence was all that was needed. I rarely take someone's word on something I can't prove for myself.

Now, what's the list of motherboards that can do this, and have been proven to do this, without any physical mods to the motherboard, CPU, or otherwise?

umheint0's phat setup --> <A HREF="http://home.cc.umanitoba.ca/~umheint0/system.html" target="_new">http://home.cc.umanitoba.ca/~umheint0/system.html</A><--

 

[Ryan_Plus_One]

My MSI K7N2 board sure as heck won't let me get past 12.5. Thats all I know.

<font color=red>Proudly supporting the AMD/Nvidia minority</font color=red>

 

[svol]

And if you take my word for a chance (or look back the proof in old threads) I will say that there are no mobo's that 100% sure unlock them all. Some report fully unlockment with the A7VN8X, some not, ditto for the Epox 8RDA(+)... both for CPUs with default high or low range multipliers. I tried to figure it out... but there is just no way to make a list.

My CPU fan spins so fast that it creates a wormhole