Need help with First time A64 Overclock!

Osirus · Oct 19, 2004

Ok, well I went from an Intel setup, to a AMD Setup, Ill list my stuff.
CPU - A64 3000+ s939
Mobo - Neo2 Platinum , bios 1.3
Ram - Geil PC3200 512mb,
Cooling - custom watercooling setup

Well I have been having some trouble trying to overclock my cpu, I want to get above 2ghz, and for the life of me, I cant figure it out!

a little help will be MUCH appricated! THis is my FIRST AMD system, and Im pretty frickin excited about it!
hehe.

First time overclock, with the help of hitechjb1

Know Nuttin · Oct 19, 2004

have you locked the AGP/PCI bus.

Try decreasing the HTT multiplier down to 3x. Some boards have problems with going over 220 (especially mine).

I'm assuming you know how to overclock. It's not much different than an intel.

Do you know how high the memory can overclock?

Osirus · Oct 19, 2004

Well Im not sure how to 'lock' the AGP/PCI on the Neo2.

Ill try the HTT down to 3x.

Yes I can overclock, had my 3.0E at 3.75 all day long.

The highest Ive had my memory is 250fsb

*edit*

I assume you change the FSB to what ever you want it to, provided you use the correct settings?

Know Nuttin · Oct 19, 2004

just make sure AGP Frequency is set to 66. that's it.

FSB is the same as any FSB. Stock is 200, so just go from there.

FWIW, it seems that the 90nm cpu's seem to overclock as well as the CG 130nm, so with a little luck, 2.4ghz should be obtainable.

Osirus · Oct 19, 2004

Well Im trying new settings now. and let me tell you, DAMN, this chip is WAY faster then my old Intel setup.
woohoo!

*edit*

First overclock,

FSB - 230
vcore - stock
vdimm - 2.85
Timmings - 2.5, 3, 3, 6

my multipler is x9.0

Current speed - 2.0ghz

I think Ill give 240fsb a try.

With the HTT settings, is the lower or higher the better?

hitechjb1 · Oct 19, 2004

Since you have a 3000+ 939 with max multiplier of 9,

try this:

Set AGP to 66 MHz
FSB or HTT set to 267 MHz
memory_FSB_ratio at 166:200 or 5:6
CPU_multiplier to x9

so CPU will run at 2400 MHz (not aggressive)
memory will run at around 222 MHz (with timings that worked)
(you said your memory can run at 250 MHz)
set HT multiplier to x3

Eventually and hopefully, try this
HTT to 278 MHz
CPU will run at 2500 MHz
memory will run at around 232 MHz (also with memory_FSB_ratio 5:6).

For more,
HTT to 289 MHz
CPU will run at 2600 MHz
memory will run at around 241 MHz (also with memory_FSB_ratio 5:6), assume you memory can handle this.

Osirus · Oct 19, 2004

How do you go about setting the HTT to 267?

These right here
FSB or HTT set to 267 MHz
memory_FSB_ratio at 166:200 or 5:6
is what Im a little confused on.

In my BIOS, i have the following
DRAM Config
High Performane Mode - manual
aggressive timing - disabled
dynamic overclock - disabled
ht frequency - 3x
cool and quiet - disabled
adjust cpu ratio - startup
adjust cpu fsb - 230
adjust agp - 66
cpu vid - 1.525
cpu voltage - by cpu vid
memory voltage - 2.85

Im not clear on the ratio thing.
Pardon my noobness on A64 overclocking

hitechjb1 · Oct 19, 2004

Somewhere in the memory section of the bios, there should be something like:

Max memory lock frequency
Auto
100
133
166
200

200 means 1:1 memory_FSB_ratio
166 means 5:6 memory_FSB_ratio
133 means 2:3 memory_FSB_ratio
100 means 1:2 memory_FSB_ratio

Other motherboards such as DFI may have more, .... But the 5:6 should keep you going for now.

Osirus · Oct 19, 2004

Yep, seen that option, so I want to run at 1T then? I believe that sets the memory to 166.
so I change the FSB to 267, then change to 166:200
Then 3x HT?

and I should hit 2.4

hitechjb1 · Oct 19, 2004

Your memory may not be able to run 1T at certain high frequency, since your memory is rated at PC3200. But that is a separate issue as far as setting up the overall system first for CPU, HTT, and memory with as high frequency as possible.

The 1T vs 2T is just a matter of system performance, a difference of around 15% on effective memory bandwidth.

Get the whole thing set up first, even with 2T. After that, you may look at using better modules if 1T is needed after some performance evauluation, ....

Osirus · Oct 19, 2004

Well 2.4 is a success!!! Woot woot!!

Ill get a screen shot right now.

hitechjb1 · Oct 19, 2004

Osirus said:
Well 2.4 is a success!!! Woot woot!!

Ill get a screen shot right now.

Congrats. Another success for my paper overclocking.

Osirus · Oct 19, 2004

hehe..
First post edited for screenshot.

hitechjb1 · Oct 19, 2004

Go for 2.6 GHz (refer to my earlier post for setting if necessary).

You may need to use memory_FSB_ratio 2:3 (if your current memory modules cannot handle 241 MHz), until you get better memory.

Osirus · Oct 19, 2004

Ill try it after a week or so, Im problaby going to drop it to stock speeds and stuff for the first week, after a little burn in period. Dont want to waste my new toy!

And man, going from Intel to AMD, Yes you can tell the differnce. Everything is running faster.
Love it!

Zac42 · Oct 19, 2004

Thats a nice OC right there, all the way up to 3800+ speeds for far less cash. I wouldnt worry too much about running the memory slower than the CPU, 'cause A64s are far less memory bus dependant than P4s.

Osirus · Oct 19, 2004

Well so far, I love it. Great CPU/MOBO.

Osirus · Oct 21, 2004

Well I am able to hit 2.5ghz.
2.6 seems impossible with my current ram. I cant even get it to boot into windows

Gautam · Oct 21, 2004

Decrease your multiplier to 8x, increase your HTT to 325MHz, but set your memory to the 133 divider. This will give you a CPU/12 divider, allowing your memory to run at a much more reasonable 217MHz. 241MHz is sort of a lofty expectation here.

Osirus · Oct 21, 2004

I dont think I can change the mulitplier. if I can, I dont know how.
am I going to lose performance running at 133?

Need help with First time A64 Overclock!

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