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question about (cF)Eclipse's OC guide..

M

maxiedaniels

Gawd
Joined
May 25, 2005
Messages
1,006
I would post this in his thread, but since it's a sticky, I don't think I will get a fast response.

I was reading through Lukano's thread about his OC'ing, and he said that he changed the HTT multiplier. What I don't get is, in Eclipse's OC guide, there must have been a typo with the HTT multiplier... it says this:

LDT/FSB Frequency Ratio: another term for the HT link multiplier. the final HT link speed = FSB (HTT) * this number. It has virtually no effect on performance, so do not worry about lowering it to get a higher overclock. As a general rule of thumb, you don't want the final HT link speed going over 1000mhz.

Ok, well FSB * the ratio.. I thought that was the clock speed... well maybe it is.. because look at this...

CPU/FSB Frequency Ratio: This is the CPU multiplier. basically, CPU speed = FSB (HTT) * this number. you have the option of setting it anywhere between and including the stock multi and 4x.

They both say the same thing. Is it a typo? If it is, which im guessing, why would it say that it won't effect performance if Lukano got a better OC with lowering it?
 
There are two multipliers to deal with on the A64 platform. HTT multi and CPU multi. HTT multi goes from 1x to 5x with half steps. Those determine the final HTT speed (1600MT/s on Socket 754, 2000MT/s on Socket 939, and up to 2400MT/s on the future Socket M2.) CPU multies are what determine the CPU speed. They range from 4 (you dont want to use) to 20 (only on FX's.) They also come in half steps, but those screw up the memory speed as the memory divider has to be an integer.

As for lowering the HTT multi, it's best to, because, the HTT speed itself wont hurt single core performance (it might bottleneck dual core) and lowering it will put less stress on the northbridge, allowing for more CPU oc'ing overhead.
 
actually, it shouldn't bottleneck dual core either. just dual cpu :D
and the ht link multi comes in 1x, 1.5x, 2x, 2.5x, 3x, 4x and 5x.
cpu multi is from 4x to stock in 1/2 increments, unless you have an FX, then you have 4-25x

aside from that, baron is correct. HT link multi sets the HT link speed.. the data path between the cpu and chipset. (and other cpu's in dual cpu rigs)
the cpu multi should be straighforward, setting the cpu's final clock speed :D
 
Good info in the above post, but this line bothers me

As for lowering the HTT multi, it's best to, because, the HTT speed itself wont hurt single core performance (it might bottleneck dual core) and lowering it will put less stress on the northbridge, allowing for more CPU oc'ing overhead.
Click to expand...


nooooo northbridge on A64!!!!!!!!
 
depends on the chipset. the nvidia nf3 and nf4 remain to be the only ones without a dual chip solution. ati, via and uli still have two, a north and south bridge. ;)
 
ULi seems to be surprisingly popular over in asia... i found this out not too long ago and was somewhat surprised :eek:
 
I saw that in the Anandtech (I think) Computex write-up. We'll see if they make it over here.
 
_mike_ said:
nooooo northbridge on A64!!!!!!!!
Click to expand...

Via chips have southbridges and northbridges. I call the chipset the northbridge in order to pander to the newcomers to A64's.

Hito Bahadur said:
There's other chipsets????



;)
Click to expand...
Yeah, and for some odd reason, people buy them. I have nooo idea why though, honestly, because you just cant beat the stability of a good modern nForce chip. Working PCI/AGP/SATA locks? What an amazing concept!
 
All AMD chipsets have a Northbridge. VIA has a Northbridge and a Southbridge. nVidia incorporates the functions of both into a single Northbridge chipset.
 
robberbaron said:
<snip>Via chips have southbridges and northbridges. I call the chipset the northbridge in order to pander to the newcomers to A64's
Click to expand...

You effete snob you, “pander?” you are getting almost as bad as some of those guys in the cooling forum ;) :D
 
well bill, think about the FSB. i have to pander to those same people to not confuse them about the true nature of the a64 and it's crazy naming scheme ;)
 
(cf)Eclipse said:
well bill, think about the FSB. i have to pander to those same people to not confuse them about the true nature of the a64 and it's crazy naming scheme ;)
Click to expand...


Lol, The truth is I was going to go into a discourse about FSB and HTT and the difference. I didn’t because you have already done it so well, and often.

Just couldn’t resist giving Baron a bit of a hard time though ;) :D
 
BillR said:
Just couldn’t resist giving Baron a bit of a hard time though
Click to expand...
don't we all... :D

*pokes fun at baron cause red baron pizza is yummy*

moving on, while we have a thread about it, anyone else have any suggestions for the oc guide? i'm thinking of putting in a bit about how the 4x cpu multi is misleading with ram speeds due to an incident earlier :p
if anyone can think of anything else, please, do say so :cool:
 
(cf)Eclipse said:
<snip>moving on, while we have a thread about it, anyone else have any suggestions for the oc guide? i'm thinking of putting in a bit about how the 4x cpu multi is misleading with ram speeds due to an incident earlier :p
if anyone can think of anything else, please, do say so :cool:
Click to expand...

I don’t think you can emphasize enough the most important part of over clocking a 64 for the noobs and even the experienced folk.

Patience.

With practice and time it does get easier but I been handed way too many machines that “won’t over clock” only to find that they would indeed over clock and some to a very high degree.

Each motherboard, piece of RAM, the CPU etc are all variables even when purchased at the same time from the same batch. Finding the key to each system can be time consuming but very rewarding in the end.
 
good idea.. that never really occured to me :p

so far on the todo list:
mention something about the 4x multi
make sure people are patient :p
 
(cf)Eclipse said:
don't we all... :D

*pokes fun at baron cause red baron pizza is yummy*

moving on, while we have a thread about it, anyone else have any suggestions for the oc guide? i'm thinking of putting in a bit about how the 4x cpu multi is misleading with ram speeds due to an incident earlier :p
if anyone can think of anything else, please, do say so :cool:
Click to expand...

Here is a new overclocking guide over dfi-street that you could look over and see if there is anything you could add out of it.

http://www.dfi-street.com/forum/showthread.php?t=12960

Updated links to the newest versions of the best stability testing programs and benchmarking programs is always a plus.
 
I still like reading new guides like Eclipse's, but it's funny to think that when I flash my BIOS now, I can set all my options as they were before in the first boot...pretty crazy I have them all memorized now. :p
 
ha, you have a neo, there's like 5 options total :D ;)

i'll look into that, thanks BG :D
 
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