Brand new P4B533-V and no clue, OC'ers -- help.

Ghostx

Junior Member
Jul 27, 2002
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I just bought the Asus P4B533-V and it will be arriving on either monday or wednesday.
Along with the Asus MB I also bought;

Intel 2.26GHz
2 * Kingston 256MB DDR333 PC2700

Gfx card and such seems irrelevant, though I could use some tips on the BIOS configuration.
So far I've figured I'll go with the 4:5 ratio on the mem, and possibly go from 17 * 133 to 18 * 133 on the frequencies, though then I notice that the AGP drops ... bad thing? Good thing?
But as for voltage and those other nifty details... no clue. Help. Am I on the wrong track here?

 

XDataChildX

Member
May 13, 2002
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Intel CPU's cannot change multipliers, therefore to overclock you must raise your fsb. After raising your fsb, your agp bus will actually go faster.
 

CrazySaint

Platinum Member
May 3, 2002
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As DataChild said, you can't change the multiplier on Intel chips. If you're going for max. OC, the process should go something like this:

1) Set mem ratio at 1:1
2) Increase FSB in 5MHz increments, running prime95 for at least one hour with no errors after each increase.
3) Keep increasing the FSB until you start encountering errors in prim95.
4) Once you start getting errors, increase the vcore by one notch.
5) Repeat steps 2-4 until:
A) The vcore is set at 1.65 (if you're using the stock HSF) or 1.7 or
B) Increasing voltage doesn't improve stability.
6) Increase vdimm by one notch in case its your RAM holding you back.
7) Repeat steps 2-5 until:
A) The vcore is set at 1.65 or 1.7v and the vdimm is set at 2.7 or
B) Increase the voltage doesn't improve stability.
8) Note your max. stable FSB speed and multiply it by 2 to determine your memory speed (IE 166FSB = DDR333).
9) To determine whether your max RAM speed.:
A) Reduce FSB back to 133MHz.
B) Increase mem ratio to 4:5
C) Set your FSB so that your mem speed is equal to your fastest stable OC (ie, if max stable OC was 166FSB and mem ratio is set at 4:5 then just keep the FSB at 133 (133 * 1.25 * 2 = 333)
D) Keep increasing FSB by 5MHz until your system becomes unstable (i.e., can't run Prime 95 for one hour without errors)
10) If you reach your maximum CPU OC before your memory reaches its limits, increase the mem ratio to 3:4 then repeat steps 8-9.

Once you reach your max stable FSB at 3:4 mem ratio, you will know your RAM's limit, as well as your CPU's (the FSB speed form step 8), chance are you won't be able to run your max CPU speed and your max RAM speed at the same time, so you will need to do a little experimentation to find the best balance between the two.

[EDIT: Bah, the forum software ruined my formatting]
 

CrazySaint

Platinum Member
May 3, 2002
2,441
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Originally posted by: Ghostx
And. Thanks a'lot! :) I hope to get it up to at least 2.5+ GHz :)

You're welcome! Oh, and one thing I forgot, DO NOT, under any circumstances, use the thermal pad that comes with the CPU. Buy some thermal grease (preferably Arctic Silver III, which you can buy for $5 w/free priority shipping from here, and use that instead.