Unlocking xp 1800 t-bred

[JayWill321]

quick question

on the xp 1800 tbred what do i have to do to unlock it....it cant be the 5th L3 bridge cuz its already closed..


Jason

[Drake]

If the L1 bridges aren't closed, then do so.

What core is it? I think B cores come factory unlocked.

[JayWill321]

the L1 Bridges are already closed.....how do i tell what core it is?

[mdzcpa]

HERE (http://www.overclockers.com/tips00173/) is a good article on how to tell what core you have.

[Drake]

Very helpful, Mike :)

[JayWill321]

well i already installed it.... i didnt get a chance to see if its a b core or not... i tried to do a very little over clock.. i have a A7N8X deluxe version motherboard and when it restarts it says cpu over speed .... and wont go anywhere....is that normal....is there a setting to turn that off?

[mdzcpa]

As long as you are only changing the FSB speed, and not the multiplier, you should not be getting that message. if your processor is locked (which it would be if it is not a "b" core Tbred) then trying to change the mutliplier won't work.

If you have BIOS version 1001G, then I also suggest you flash back to 1001C. 1001G is a real headache when trying to overclock (not to mention it's a generally sucky buggy BIOS).

[JayWill321]

i got just the fsb to work but when i change the multipliers it wont work.... what do i gotta do to unlock it.....the L1 bridge is all closed and only the first bridge on l3 is opened

[mdzcpa]

Originally posted by JayWill321
i got just the fsb to work but when i change the multipliers it wont work.... what do i gotta do to unlock it.....the L1 bridge is all closed and only the first bridge on l3 is opened

Hmmm...are u absolutely sure? Usually the CPUs with the closed L1s have an open 5th L3 (Tbreds), and visa versa (Paliminos).

Either way you will need to flash to the 1001C BIOS if you have 1001G. The 1001G does not allow multiplier changes.

[JayWill321]

how do u flash the bios? ive never done it before....and for the cpu im definetly sure i used a magnyfying glass before i installed it

[mdzcpa]

Flashing the BIOS is easy....this is what you need to do.

First go HERE (http://www.asus.com/support/download/selectftp.aspx?l1_id=1&l2_id=10&l3_id=23&m_id=1&f_name=aw1001c.zip~zaqwedc) and download the 1001C.bin file.

Next format a floppy disk and copy the 1001c.bin to the floppy.

Insert the floppy and reboot the comnputer. When the BIOS screen comes first comes up, press ALT + F2 and you will enter the Built in AwardBIOS Flash Utility. Type in the name of the BIOS file (1001c.bin). The utility will do the rest. Your manual also has a full set of instructions on this.

As far as the chip is concerned, I'm not sure what to think. Try flashing the BIOS to 1001C and see if your mutlipliers work. Perhaps you have a XP1800 B core and it is already unlocked.

[Snowman]

Originally posted by mdzcpa
As far as the chip is concerned, I'm not sure what to think. Try flashing the BIOS to 1001C and see if your mutlipliers work. Perhaps you have a XP1800 B core and it is already unlocked.

I have the B core 1800, it came unlocked, Have tryed 10x, 10.5x and 11x no prob

JayWill321.. look at your chip and see if its a AX1800DMT3C, that's a Palomino. AXDA1800DLT3C, that's a Thoroughbred A. AXDA1800DUT3C, that's a Thoroughbred B.

Your looking for an M or L or U

BTW My L1 were closed and only the 5th on the L5 was open

[tripodal]

same here, 1800 comes unlocked, i believe the the 5th l3 is just for multipliers above 12.5.... which i wont use anyways

[mdzcpa]

Hmmm..okay.

JayWill321,

If this is the case all you will need to do is get to the 1001C BIOS and you should have the mutlipliers at your disposal.

[LoRdKyRoN]

ok so i was reading this forum and now i got a question i just got an 1800+ not sure if its a palo or tbred yet going to pop it out and see in a min but. i have not unlocked my chip yet and i can change the multiplier in the bios and the chip works. ie right now its set at 11.5 266 144 and its oc'd to 1667 the 2100+ specs now if i change the multi to say 12 it says i have a 1900+ and at 12.5 it says i have a 2000+ ... is this right? and how does this differ if i unlock the cpu?

[tripodal]

you have b core, and its unlocked already.
the biggest point in unlocking is to lower the multiplier
then you turn up from 133 to much higher
memory speed is increased that way.

[LoRdKyRoN]

ok so just ripped the cooling out and found that i have a Thro a in my box. so now im like really confused.

[mdzcpa]

What was the stepping code on the CPU?

[LoRdKyRoN]

not sure what your asking for exactly but the number the artical told me to check was the AXDA1800DLT3C. which means i have a TBredA.

[mdzcpa]

I was referring to the number on the sticker on the CPU. If you indeed have AXDA1800DLT3C on the sticker, then it is indeed an A core.

It sounds like the chip is unlocked, but that would not be expected with an A core Tbred.

What you should do is try different multipliers (other than the spec 11.5 for the XP 1800) then confirm the mutliplier is working with WCPUID (which you can get HERE (http://hp.vector.co.jp/authors/VA002374/src/download.html) ).

[LoRdKyRoN]

ok so getting things set up heres what i had found already.

at 11.5x 266, 140 the bios reports i have a 1800+ at 1.53GHz
12x 266, 140 1900+ at 1667Ghz
12.5x 266, 140 2100+ at 1733GHz

now if i messed with the voltage it changed things too and the FSB to 275 said i had a 2400+ running at 2.1 GHz but windows failed to load. lol i accually started backwards on this process trying to find where my processor should be set up normal like.

is this what you wanted to know?

[LoRdKyRoN]

ok, on my cpu if i set the mulitplier to say 12 at 266 FSB clock and 144 FSB my bios says i have a 1900+ cpu. if i set it at 12.5 266, 144 it says 2000+ ... so someone said i had an unlocked processor already and to set my multi as low as possible and crank up the FSB...so i played around today and set the multi to 6 266 and i cant get the fsb above 145 or my system reboots. i tried it at all the differnt multipliers and no matter what multiplier i set the box at i can not get my FSB above 145. what am i screwing up?

i tried setting the Cvoltage from 1.50 to 1.575 to help smooth things out and all that did is cranked up the speed of the cpu but didnt help me out on getting my fsb stable above 145. so now im confused. if i set the mulitplier to 6 and the fsb to 144 @266 it says im running an 850MHz cpu......but if i change to 145 fsb it reboots and hangs. dont make sense since i can set it to 144 at 11.5 and 12.

[WesM63]

Hi LoRdKyRoN,
You've even confused me. LOL. I don't know where your gettin all these extra numbers. The speed of your cpu should look something like this
133FSB (Double Pumped)x 12 multiplier.

Your total FSB is determined by that 133 above x2 for 266. So say you set your FSB to 166 in the bios, the total FSB will be 333 then.

I might be missing something since that is an Nforce 2 board and have never messed w/them. Even at that your default core Voltage should be 1.65v if your Cpu is a T-bred. Wich in order to tell if you have and A or B core you need to know the second line in the stepping. You can tell by the 5th letter in the second line. Such as
AIUGA

I'am sure mike can help yah since he's owned the A7N8X.

[LoRdKyRoN]

ok lol this is what i know. in the bios i can change 3 things for the cpu. 1 the multiplier. witch i have at 11.5 at the moment. Next it says FSB Clock wich can be set from 1 to 280. i currently have it set to 266. the last thing i can set is the core voltage. which is set to 1.575v. in windows MSI gives you a program called fuzzy logic 4, there i set the fsb to 144. witch in turn sets the bios to amd 1800+ processor. thats where i get all the numbers. thats why im so confused. lol. the DDR i have set to 400MHz right off the start also ..which im not sure shoudl have set at cuz if i speed up the fsb wont that affect the DDR speed or are they separate?...

[mdzcpa]

Holy smokes this is confusing! Okay one thing at a time.

First off, are you using the MSI KT4 Ultra mobo that is in your sig?
If so, you have a VIA KT400 chipset mobo.

Next, as Wes indicated, there are only two settings that determine CPU speed...the FSB speed and the multiplier. For the XP 1800 which runs 1.533ghz stock, the settings are 11.5 x 133 (11.5 x 133 = 1.533ghz).

All XP CPUs run at at default FSB speed of 133mhz, except for the new XP 2700 and 2800 which run at 166mhz FSB. The XP 2600 comes in both 133 and 166 flavors.

When you hear that a CPU runs at 266mhz, that is the CPU bus which automatically runs at 2x the FSB speed, or 2 x 133. You never need to set that speed. So even though you have a 266mhz CPU bus chip, that means you set the FSB to 133 for spec settings.

Now, to adjust the FSB, only do this in BIOS or in the Fuzzylogic program in windows...NEVER both places. So for now, just use the BIOS. Make sure any fuzzylogic settings are disabled on boot up.

Under the frequency/voltage control screen in the BIOS set the CPU FSB clock to 133mhz. The CPU Ratio setting is the multiplier. So by leaving that on Auto, you will get 11.5 for that XP 1800. Boot the computer and check your settings with WCPUID. Make sure you see the multi at 11.5 and the FSB at 133.

Next, check to see if you have mutliplier control. To do this go into the BIOS and change the multiplier to 11, save the changes, and exit. Reboot and check with WCPUID that you are now running at 11 and 133mhz. If you can do this, than your chip is unlocked.

If your chip is indeed unlocked, then you can try lowering the multiplier to 9 and the FSB to 166mhz. This would give you about 1500mhz (or 9 x 166). At this point you are not overclocking the CPU because you are still under the stock 1533mhz. See if this works.

Now, work things up from there in 1 mhz FSB increments. You will be overclocking things as you move up. you will need to add a small amount of CPU core voltage as you go.

Adding Core voltage on its own does NOT overclock the chip (or change the speed the chip is running at in any way). More voltage only stablizes the chip when it is being run faster then spec.

You memory speed is set seperately and is adjusted under the DRAM Timing Control Page under Advanced Chipset Features. What you want to do is set that to Auto for now and leave it. It will read that you have PC3200 (DDR400) memory in there and run the memory at that speed. Now, when you run your FSB up to 166 or above, the memory speed will automatically be run synchronously at the same speed as the FSB. So at a FSB of 166, the memory will run at 166. That is exactly what you want to happen for best performance. As you increase FSB above 166, the memory will increase too.

Remember, make the changes in the BIOS...not fuzzylogic. And get WCPUID to check the results of your changes. Do not rely on anything else.

Try all this and report back.

[WesM63]

Sorry about that LoRdKyRoN, I thought you had a Nforce2 board, but it was actually JayWill321. Sorry bout the mishap, sounds like Mike has pointed you in the right direction anyway.

[LoRdKyRoN]

OK SO NOW IM SOOOO CONFUSED. all this time i have been running 11.5 x266 in the bios and getting a amd 1800+ at 1533Mhz. so i changed it to 11.5 x133 and it says i have an amd 1800+ a 1533MHz. so i did what you said and dropped it to 11 x133 and got amd 1700+at 1467MHz. so does that mean it resets at 266? or do i have like a confused mobo. and it is a via chipset. this is my 5th MSI mobo and they all work sweet BTW i havent seen any of the problems that people seem to relate msi too. so anyway. it seems that my cpu is unlocked so whats my next step?

[Drake]

Strange. You change the FSB but it doesn't change. Use WCPUID to check what's happening.

BTW, Kyron, you need to delete the spaces and put in your SETI@Home email for your sig to work.

[LoRdKyRoN]

well when i change the fsb it does the change the clock rate of the cpu. a little but thats not the problem the problem is i can set it at 133 or 266 to start out with and eitherway that shows the same in wcpuid.

[Drake]

From what I've heard about MSI mobos, their BIOS overclocking options are crap and FuzzyLogic is where you should do it.

[lechumbl]

Hi Drake,

I have two MSI mobo's running now, and I have to disagree with you.
The BIOS options are fine.
Fuzzylogic 4 is crap. It is not for a serious overclocker, just for someone who does not know how to get the most from the BIOS adjustments.

I tried both, and I get a higher clock from BIOS than I can get from Fuzzy. And it is still very stable.

Take care....

[Drake]

May have been the other way 'round :rolleyes: thanks for the input, Lee

[lechumbl]

Hi Drake,

No sweat.
As you get older, the mind is the second thing to go.
Let's not ask what is first. :D

Take care.......

[mdzcpa]

LoRdKyRoN:

Hmmm...it sounds to me like things are working just fine.

If you set the BIOS to be 133 x 11.5 and it says you have 1533mhz than that is coorect (133 x 11.5 = 1533).

If you then changed the mutliplier to 11, left the fsbb at 133, and you got 1467mhz, then that is correct too (11 x 133 = 1467).

What's the problem?

Do not use the Fuzzy Logic program.

Are you checking your results with WCPUID?

[mdzcpa]

BTW, I think when you set the Clock Rate to 266, the board knows that you are making a mistake and resets the FSB to run at 133...default for the processor you are using.

To overclock, start at 133 and increment up one mhz at a time. In order to achieve higher FSB speeds, you will need to drop the multiplier. Like I said, a good place to start is 9 x 166. That will get you CPU to 1500mhz. Then up the FSB 1 mhz at a time. For every mhz you move up, the cpu moves by 9mhz.

[LoRdKyRoN]

ok i went through the numbers and am currently running my 1800+ at 183 fsb, x9 , 1.575v and am getting 1653 MHz. at 184 the comp locked up. i set the voltage to 1.6 and still locked up. so i just set it back down to 183. so the next question is should i take it up 9.5? and if so what should is start the fsb at 166 again?... oh btw i redid my 3dmarks at this setting and nailed a 10809. so its comming up muuuhahaha. again thanks for your guys help.

[Drake]

I'd just put it up to 9.5x without messing with the FSB. If you don't boot or become unstable scale back.

[mdzcpa]

Your at the point where you may not be sure if it is the memory or CPU becoming unstable. Your choices are to raise the multiplier to 9.5 are drake suggested, or lower the multiplier and go for more FSB.

What I suggest is upping the multiplier to 9.5. You should also drop back the FSB from 183, down to say 173, and begin incrementing back up. Since you know 1653 is stable for the CPU, starting out at 173 x 9.5 (1644 or so) should be easy. Now begin upping the FSB again. If you lose stability only moving up a few mhz, then you'll know it was the CPU becoming unstable above 1653. If you can take the CPU above 1653, you will know that it was you fsb of 183 holding you back.

So far...good overclock! Keep playing with it. Don't forget to add core and DDR voltage as you go. As long as your CPU temps are okay, you'll be fine.

[LoRdKyRoN]

OH yea baby 9.5 180x 1710.. and holding nicely. think ill leave it here for a few days and see how she runs ...thanks for all the help with all the reading and yourguys' help i have gathered alot of info fast. you guys rock. :D :D :D

[Drake]

No prob and congrats on the overclock :D

[mdzcpa]

Good job on the OC:)