I have a question,about my P4 2.6C on Abit IC7-G mobo using Apacer DDR333 (Infineon chipset)with default timing 2.5-3-3-7.I got try to o/c my RAM from 166Mhz to 218Mhz with CPU:DRAM=1:1 ratio.My CPU is 218 FSB.Result is stable after i run on benchmarks and also playing games.But another thing is i am not so understand about my RAM that it cant even reach 200Mhz with CPU:DRAM=5:4 while my CPU FSB is 250.It wont be stable in gaming but stable in benchmark.The pc just hanged when the game started about 5 to 10 minutes.Sometimes no hanged.My Vdimm default at 2.6v.But i have tried to increased the Vdimm to max 2.8 but also happenned the same thing.Then i put back to 245 FSB then everything run smooth in benchies and gaming.Even 246FSB will cause pc hanged also sometime.SAD...

I wish i can go above 250 FSB but i know my Apacer RAM is giving me a limitation.Can anyone help me in this?10q...

Stupid Apacer RAM Make my o/c limited. So disappointed with APACER. Maybe later might get myself a better pair RAM to o/c.

Could it be your mobo problem?Your mobo is limiting your o/cing.Since you are using 1GB KVR400,i assumed is Kingston KVR DDR400 rite?Another question on your KVR,What is the chipset on the RAM using?DT-43?

Your Intel 865 PERL does not have the performance mode on its' chipset.So no performance mode can be enable on your mobo.

Performance RAM will boost in overclocking because they have better chipset and better timing compare to the value RAM. If talk about faster,more RAM on your system definately faster.I think that you are talking about the speed of the RAM.Well RAMs can be overclocked to acheive more bandwidth and in faster speed.
About the PAT,Intel 865PERL cannot enable but the Intel 875PBZ or the other mobo with the 875P chipst will have the PAT function.Some other mobos like the AI7 which is using the 865chipset can also enable the PAT function via some setting on the board.But nowadays those 875P and 865P chipset mobos are very hard to get.I saw someone selling these boards in garage sales.Maybe you can try your luck there to get them.

Your processor P4 2.26Ghz is using the 133fsb by default.So the system bus speed is 4* 133fsb and you will get 533 bus speed.You have to increase the fsb to 200Mhz then you can get the 800Mhz bus speed by using the 1:1 division.You can't set 1:1 then you may try other division like 5:4.What is your setting for the division in bios?Because saw your CPU-Z report on the CPU:DRAM=FSB+66 and the RAM frequency is 208Mhz.A bit strange.

In his case,i don't think that he is asking about this PSB settings.If do,he can either put auto or psb 533.Changing that will give type many type of ratio?I think that have to depends on mobo bios.PSB 800 is suitable to use on processor which is running on 800 FSB.Not necessary all the time the ratio must be run on 1:1 but sometimes DRAM can run slower.

Wao,by setting the PSB 800 you can reach 4Ghz ah. Great o/c man.What is your division using?1:1?If 1:1 then the RAM is running on 235Mhz and DDR470 rite?Nice result you have.

I guess your RAM can go higher up to 250Mhz because saw you using the DT-D43 chipset RAM.I wander i have that RAM inside my CPU.Your cpu really powerful la.If you dare to o/c more until 4.5Ghz using better cooling that shall be great man.4500/18=250Mhz

Just asking by setting lower value of the psb like 533 or 400 can boost higher o/c?Because i am not sure about using lower psb values.Any hints for this?

"OTAI"?Not understand,don't know what is that.


Your V-core is very high.Using the 3:2 division can make your cpu go higher?By right your RAM should be running on 200Mhz(DDR 400).Now only on DDR333 speed and it's consider underclock.Your RAM is running on 174Mhz and the FSB is about 261FSB on your cpu.Why not trying the setting on 5:4 division to get the optimum performance between your cpu and the mobo?The RAM timing should be adjust to loose a bit if u want to go for higher CPU speed using your current division.What chipset is using on your Kingston KVR?If it's Hynix DT-D43 then you will have a very good result on 1:1 division one since those D43 series can go on 250Mhz on default setting very easily.


I hope that you understand what i am expressing here.

Anyone can help me to clarify this?Recently no extreme overclockers visit this thread already?Haha,long time din see ztlee already.

Any new results from Paile?Did you set the Vdimm to 2.8v as nelza said?Your RAM is BT,CT,or DT version?

Not to pump the Vcore beyond 1.7v is considered safe at your statement.

Celeron D is using prescott core,Vcore is lower but hotter.Althought like that,all Vcore not exceeding 1.7v is more safer and won't shorten the life span(for northwood and prescott core).

The CPU benchmark is a bit slow on a 3.5Ghz speed compared to the northwood proc on the almost same speed.But nevermind,just try on higher speed on the RAM.I believe you will be able to acheive on 260FSB with some tweaking.

(edit:typo mistake)

This post has been edited by raymond5105: Mar 30 2006, 11:31 AM

Wao,only using 350W PSU.A bit dangerous for your system.But can be o/c to 3.5Ghz is very good already.Keep up your work to o/c higher after getting new PSU.

Wah,your RAM slot one of them kong already?Unbelieveable......Cannot clear cmos also?Then no more dual channel running on?

For the 865 mobo,the mobo only will be running in performance mode enable in certain PSB setting.If i am not mistaken the setting is PSB667,the value only useful on the non type C processors.Correct me if i am giving the wrong info.

@ tone, you have qiute high o/c with your mobo.What mobo are you using?And for sure you have a pair of good RAM also.If not also your RAM cannot reach 387Mhz.Your Super PI 1M need about 28seconds+ to complete,nice result.