a friend of mine got Gigabyte GA-81PE1000G, P4 1.5, 512MB DDR266, MSI GF5200 Seagate 80GB SATA HDD... I OC'd it to 1.7 and the timing i set to 2-2-3-7 but got slower windows loading... y is tat...? same case wif my current rig on my siggy if i go beyond 2.5...

I read an article showing that the memory controller will be throttle at certain frequency after overclock.I think i found back the page,you can try to refer here.

Intel Strap
I can't read the page already as i didn't register in this forum.You can try to read it up here.

1:1 bandwidth lower ar? i thought 1:1 divider gives you better performance over 5:4?

I got 75 - 76% in the Sandra testing using 1:1.. Tthis % is going to give huge effects on the whole system.I think the higher the memory bandwidth the better it does.

im back.. will update it tonite

yeah.. i tot 1:1 will give better performance rite?

Thanks as need you to update the info. Well i am also thinking that the 1:1 will be giving the best performance in memory.I am doubt with the 5:4 divider.

systool ?
my ram is just Kingston KVR PCF normal chipset only, 2.5v..(default 3-3-3-8, but can set it to 2.5-3-3-6 manually) i think cant set the timings to 2-3-3-5..
and this intel mb, cant add voltage at all..

divider can cause the system unstable is it ?

Not to say like that but the divider is always the best that you can run on 1:1.This will make the proc and memory speed be synchronize.

maybe 1:1 is too low as the processor is using 100fsb. higher ram speed may be better. i think by default it is 100:133(cpu:ram). if set to 1:1, try to push fsb to 133, 133*15=1995MHz just at the default ram speed of DDR266.

can oso

eg : if ur ram limit is 210Mhz, lets say u r running on 210x18 = 3.8Ghz
then u cannot use 4:5...it will make ur ram ram speed higher than 210Mhz. so 1:1 is the best.... highest fsb with highest ram speed rite?

I got one question that is blur about that.How to differentiate between the P4 "C" proc and a normal P4 HT proc? Since both of them also got the HT function on the processor there,it's hard to define them. I thought that all the procs that came with HT are P4 C not including the P4 "B" 3.06GHz with HT.

Not necessary that 1:1 will give u the best in performance, it depends but most of the time 1:1 serves you best results. For C users, your RAM is the most important factor. B and A Prescott users no need to worry, best to use 1:1 instead.

For C users and E users, best example would be with BH-5/6 or UTT RAMs, they can't scale as high as the proc ( most of the case unless your CPU suck ) so ppl use 5:4 instead, performance wise in sandra, nearly the same with 300Mhz FSB 1:1 with TCCD due to the bandwidth efficiency.

Same with my case, my 5:4 bandwidth efficiency is better than my 1:1 so it depends

raymond5105: HT procs started off with the P4B 3.06Ghz, after that all the C procs with HT are out. And what do you mean by normal HT proc? Those days the "C" is just to differentiate between non HT with HT as well as the 800(200)Mhz FSB with the 533(133)Mhz FSB. As for the rest of the specifications, B and C are the same.



Yup, some RAMs don't like dividers. It can cause your system unable to boot or hang



This post has been edited by shinjite: Jan 24 2007, 12:14 PM

p4 c = northwood
p4 e = prescott

correct me if im wrong

That's under Northwood core.You can see from attachment below.


Attached thumbnail(s)

From the pic, the place where you highlighted, it is still considered under the C category, due to its being Northwood, 0.13micron, HT and with 200Mhz QDR FSB and 1.5V

Prescott onwards different already, 0.09micron, 1MB L2 cache, lower Vcore

This post has been edited by shinjite: Jan 24 2007, 07:35 PM

i think later p4'B' uses northwood core with 533fsb non HT. The 'C' is the northwood that with 800fsb with HT. Northwood only having 512kb L2.

E is prescott that features 800fsb with HT, the low end prescott with 533fsb, non HT is the p4'A'. Both A & E having 1mb of L2 cache.

Just my 2 cent.

Why they don't make those P4 800FSB HT under "C" ?Just little bit confuse with it.But i know that those P4 800FSB HT are called "C" type proc. The table might be confused up other poeple as some of them are not declared with "C" in the table.

You are worng.P4 A type got 2 versions. Earlier version is just having 512kb L2 (Northwood)with the later one is based on prescott which is having 1MB L2.

i know la.......the 1st old p4 is fsb100 with 512kb L2. damn.....miss that..

But eventhough it state like that, normally when sell p4 northwood with 800fsb & HT sure is 'C'. maybe that is for OEM??

The table i have atteched is confusing me. Then conclusion is all the 800FSB proc with HT are categorized in " C " .

@ shinjite, the normal P4 HT proc i meant was pointing at the attachment that i posted,why is not P4 "C" ?

Regarding divider,i don't have experience on using the CH or BH chips but i know that those RAMs are good in overclocking. Bandwidth efficiently i think should be more or less the same with the Hynix chip right?