EP-8KHA+ & FSB/PCI ratio

[ares]

This is for 8KHA+ users mainly..
Of course it has two diferent sets of FSB/PCI multiplicators :
- FSB 100 -> 1/3
- FSB 133 -> 1/4
But, I heard that it (EP-8KHA+) has a new set of multiplicators at FSB 166 (1/5) - is it true ?
If it is true, that ratio is enabled automatically by mobo or I have to set it manualy ?
If somebody is using 166 FSB - please tell me the value of PCI and RAM.

 

[Maximus Nickus]

Nope there are not PCI dividers over 133FSB.

There is however a 3/4RAM Divider with the new Beta BIOS' which enables you to run high FSB (if your AGP/PCI can take it) and have your memory running at a lower frequency.

So at 200FSB the memory will be at 150FSB.

Hope this helps,
M_N

 

[ares]

Bad news.... You see, RAM could go highter (eg. I can use DDR333 instead DDR266 or I can push it to 150-160) but the real problem I think it's PCI clock.
If MB use 1/4 multiplicator for FSB 133+ I think is hard to go over 160.... safely .

This new beta BIOS seems interesting - I'll go for it - but the PCI clock will remain the problem.

Thank you anyway....

 

[Maximus Nickus]

I can go to 180FSB with no problems.
Muskin Rules over at www.amdmb.com can get to 200FSB fine.

M_N

 

[FRANK]

The PCI divisor issue has been the subject of an ongoing debate between people much more knowledgeable than I am, they can't agree so who am I to argue. The general consensus is that they don't exist.

The bottom line is that most users of this board have been able to run ungodly FSB settings, most are getting into the 150 to 160MHz FSB range with no problems, and many have cracked 200MHz when utilizing the 3/4 memory divisor, myself included. I have two of these boards and have had several CPUs ranging from DURON 600s to an XP1600 over 200MHz FSB on each, my best being 207.

Quality peripheral components are a must to achieve this. Good NIC, RAM, top notch HSF etc. These boards have been reported to be rather finicky as to the power supplies as well, with the +5v line being the most critical. You need to have a "STABLE" +5v with minimal fluctuation and maintaining voltage above 4.9v or so.

Once you get this board set up you should have a good system that will serve you well until the "next good thing" comes out. Oh it already has, now there’s the 8K3A with the ability to run an "official" memory bus of 166MHz and begin your overclocking from there.

Good Luck!

 

[ares]

A few minutes ago I received an answer from the happy boys from EPoX but it is like a glass of water in the Pacific...

Now,
----------------------------------
FRANC :
Good answer, but I want to keep this MB. To achive a stabile 5 V line it seems to my like tring to go to the moon - but you are right - I see for myself that the 5 V is not rock stabile...
But you made me curious.... you say that you achived 200 FSB on a Duron ?! I don't know what to say.... I couldn't reach 133 with my TBird (only 950->1050 / 1100 ).

----------------------------------
Maximus Nickus :
Please tell me the clock for your PCI,AGP and memory when you work at 180.

 

[Maximus Nickus]

His CPU is unlocked, he could run 200FSB at stock CPU speed.

As for my AGP/PCI the PCI is around 47Mhz the AGP I haven't read yet (dead CPU at the mo) the key to a high FSB is lots of voltage through your memory.

Using Crucial 2100 memory, and having quality PCI cards is the correct slots with the correct IRQ's.

For example AGP IRQ is 11, Sound card is PCI 3 or 5.
If you want to know the rest I'll let you know, its proven that these settings are more stable at high FSB.


M_N

 

[FRANK]

Yes the Processor is unlocked, easy to do on the Morgans, just like the old T-BIRDS/DURONS. The temeratures here have skyrocketed this week so I've backed it down a bit to, 150 FSB/150 MEM bus with lower voltages. I did just jump them up to get some current screen shots for you, My memory scores are usually higher, I backed the memory timings back as well to facilitate these tests.

Here's a couple of screen shots of a DURON with a FSB of 200MHz+, first the memory (202 FSB, 152MEM bus);

 

[FRANK]

CPU 201 FSB, 152 MEM bus;

 

[RainMaQer]

His CPU is unlocked, he could run 200FSB at stock CPU speed.

As for my AGP/PCI the PCI is around 47Mhz the AGP I haven't read yet (dead CPU at the mo) the key to a high FSB is lots of voltage through your memory.

Using Crucial 2100 memory, and having quality PCI cards is the correct slots with the correct IRQ's.

For example AGP IRQ is 11, Sound card is PCI 3 or 5.
If you want to know the rest I'll let you know, its proven that these settings are more stable at high FSB.


M_N

Alright... start talking bud







What can I say... you got my curiousity

 

[Maximus Nickus]

Ok here we go:

In the PNP section of the BIOS these are the most stable/fastest options.

First is: INT Pin1 > AGP Card set to IRQ11
Second is: INT Pin2 > PCI slot 2 Raid/Scsi Card > IRQ10
Third: INT Pin3 > PCI slot 2&5 onboard sound/soundcard > IRQ5
INT Pin 4 > PCI slot 4&6 > Onboard USB/NIC/Modem > IRQ9.

It means that say PCI slot 2 can have a Raid or Scsi card, set to IRQ 11.

These settings are quicker and more stable, I got about 5FSB more.

Hope its not to complicated
M_N

 

[ares]

About FSB/PCI ratio I have no other question....

FRANC :
You say that your CPU is unlocked... so is mine... or at least I think it is.
Do you mean the pen trick ? (L1 contacts)
If yes, I couln't know how could you reach 200 MHz - I set the FSB at 133 (from CPU FSB jumper on mobo not from BIOS) but my thunderbird (oficial : 950) didn't started....
Or it is another lock in the processor ?

all : thank you and see you on forum...

 

[ecky]

after u unlock ur cpu, u will have to lower ur multiplier to achieve high FSB. and yes it is the pencil trick