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View Full Version : Alright, I'm finaly going to do it!---DISABLE MY L2 CACHE TO REACH 800mhz!!!!

Spleen
10-11-01, 07:28 PM
:eek: :eek:

Yep! It's true! Since my multiplier is at 1/2 still, and i'm running at 755mhz, so my BSRAM (hehe...BSRAM) is running at 377.5mhz. (even tho it's only 3.1ns ram, and runs at 325 w/ my 650 not overclocked). That's quite high.

Here's the info on the slot A Athlons, i'm almost 100% sure that i have a .18 athlon:

- 500MHz: 4.0ns BSRAM, 1/2 L2-multiplier, 1.6V VCore, 0.25 micron.
- 550MHz: 3.6ns BSRAM, 1/2 L2-multiplier, 1.6V VCore, 0.25 & 0.18 micron.
- 600MHz: 3.3ns BSRAM, 1/2 L2-multiplier, 1.6V VCore, 0.25 & 0.18 micron.
- 650MHz: 3.1ns BSRAM, 1/2 L2-multiplier, 1.6V VCore, 0.25 & 0.18 micron.
- 700MHz: 2.9ns BSRAM, 1/2 L2-multiplier, 1.6V VCore, 0.25 & 0.18 micron.
- 750MHz: 3.3ns BSRAM, 2/5 L2-multiplier, 1.6V VCore, 0.18 micron.
- 800MHz: 3.1ns BSRAM, 2/5 L2-multiplier, 1.6V VCore, 0.18 micron.
- 850MHz: 2.9ns BSRAM, 2/5 L2-multiplier, 1.7V VCore, 0.18 micron.
- 900MHz: 3.3ns BSRAM, 1/3 L2-multiplier, 1.8V VCore, 0.18 micron.
- 950MHz: 3.1ns BSRAM, 1/3 L2-multiplier, 1.8V VCore, 0.18 micron.
- 1000MHz: 2.9ns BSRAM, 1/3 L2-multiplier, 1.8V VCore, 0.18 micron.


How to do calculations:

- L2-cache chip (BSRAM) max rated speed: 1000 / access = rated speed [MHz],
where access ranges from 4.0ns to 2.9ns and can be read for each Athlon
processor from the table above.
Example: Athlon-750MHz: 1000 / 3.3 = 303MHz.

- L2-cache chip actual speed: CPU speed * L2-multiplier.
Example: Athlon-750MHz: 750MHz * 2/5 = 300MHz.



Alrighty, so here's whats i'm gonna do:

Disable L2, and bring up my processor to 8.0 x 100 @ 1.75v and see if it boots up OK. If it does, then i know that my L2 is holding me back. :)

Do you think that i'll need to raise my vcore to 1.85 to get 800? I needed to raise it to 1.75 from 1.65 to go from 700 to 750.

Thoughts?
Slurgi
10-11-01, 07:59 PM
I dont think you would need the 1.85 Voltage...

But if it wont boot or isnt stable at 1.75, hit the 1.85!
asmodean
10-12-01, 02:02 AM
Disabling L2 cache can only lead to a slower chip, altough the MHz could be higher. My previous chip, Pentium 2 350MHz, went to 399MHz with L2 cache on, 466MHz with off... 466MHz was MUCH slower than 399MHz...

I wouldn't advice keeping it off, but for testing purposes, why not?
Spleen
10-12-01, 02:08 AM
Originally posted by asmodean
Disabling L2 cache can only lead to a slower chip, altough the MHz could be higher. My previous chip, Pentium 2 350MHz, went to 399MHz with L2 cache on, 466MHz with off... 466MHz was MUCH slower than 399MHz...

I wouldn't advice keeping it off, but for testing purposes, why not?

Exactly :)

Well, i didn't reach 800! :( :( :mad:

How can I tell if I have a .18 or .25 Athlon?
-=UR=- Ranger
10-12-01, 02:10 AM
Change your Cache divider to 2/5 that should be enough. I´m using 2/5 for 954 no problems!
You can use this utility to change level 2 cache in Dos...
I used it until I got the latest bios for my Board which lets you change Level 2 dividers in Softmenu III (Bios)
Hope that helps!
pm me if you have further questions!
-=UR=- Ranger
10-12-01, 02:14 AM
Originally posted by Spleen


Exactly :)

Well, i didn't reach 800! :( :( :mad:

How can I tell if I have a .18 or .25 Athlon?

Ok, give it a little more voltage then...
1.85 isn´t a problem if you have good cooling.
I´m using 2.05 for about 4 moths now...no problems so far..
If the first line of the stepping code on the case ends with an A you got 0.18 Micron!
SpEeDyGoNzAlEs
10-12-01, 10:58 AM
What's the use of having a HOTTER and SLOWER CPU?

You disable L2 cache, and increase MHz speed.You loose performance, gain heat...

Do you really think it's advisable?

I think you shouldn't only think of MHz... You should think of a better and more performant processor... And that way, you will be on the bad way... Thus decreasing you CPU lifetime ...

I guess it's a bad idead but.. It's your call, though...
Spleen
10-12-01, 03:27 PM
Originally posted by Spleen
[BAlrighty, so here's whats i'm gonna do:

Disable L2, and bring up my processor to 8.0 x 100 @ 1.75v and see if it boots up OK. If it does, then i know that my L2 is holding me back. :)
[/B]

I was just doing that to see if my L2 Cache was the one ****ing me over. :rolleyes: I wasn't going to keep it that way! lol...i got 14fps in quake 3 when I normaly get 55!