Why my e6600 won't overclock beyond 3.6GHz on P5W DH?

[tareq]

This is how my rig is setup:
-->6600 (1.5V) @ 3.6 [i've tried increasing the Vcore even more but wih no use]
--> P5W DH@ 400 FBS [the chipset is setup to the max 1.65V and with rest of V specs are set to the max]
-->Crsair DDR2 800 at 4-4-4-12 [i've tried to relax the timing 5-5-5-15 overvlock further but with no use too]
-->ATI 1900XT 512MB over clocked to 662 and 547
--> power supply is 600W
--> the cpu and GPU are cooled with swiftech water blocks. [ i know its not an overheating problem bc the temps are very good.]

 

[tareq]

yeah, i agree. that's a given but i'm asking this question bc i've seen ppl reaching 4Ghz wiht 6600 but with a faster Ram. so im not sure if its the ram or not? 800 is pretty fast too, i think.

 

[enforcer22]

I was going to state each electronic componant never comes out the same as the rest so results would vary but he beat me to it

 

[djplanet]

Your whole system is fine. The thing is someone else can have your exact system specs ad get a better OC then you. You may have a better OC then sumone with your same setup. Each chip, CPU and RAM, is diffrent. So each system will OC diffrently.

Agreed. Every chunk of silicon is different. Personally, I don't know why you're complaining. You're mananging to squeeze more than 1 GHz above clockspeed out of that thing.

 

[tareq]

i know that already. of course each chip has different capacity and so forth. i just thought maybe there is a way to make it overclock even further since the temps and V core are "low." i thought maybe a faster ram would do it, any ideas?

 

[enforcer22]

If your exceeding the rams specs on frequancy then the awnser should be apperant. Otherwise no but maybe better over clocking ram could help assuming its the ram holding you back.

 

[enforcer22]

yeeeeeeeeeeeeah me to but he asked i told.

 

[tareq]

Personaly i thing he has reached the limits of the CPU.

I guess so. in any case, if anyone has any ideas plz share and i'm greatly thankful!

 

[tool_462]

You have tried everything except to drop the speed of the RAM to maybe 667, and try the next step up.

I am still going with the crowd and saying the chip hit it's limit. My friend and I have nearly identical systems (Mobo/RAM/CPU/GPU) and with my D805 on air I can hit 4.0 and he has a Thermaltake Bigwater SE and cant get above 3.9 on his identical CPU.

Either way, congrats on squeezing 40% more for your money out of the processor!

 

[tareq]

hummmm, thats something i have not thought of. i wonder if it works would the preformance be better with the extra Mhz and lower ram speed or as is it now with the faster 800 speed?

 

[GrimReaperGuy]

Have you set the RAM to follow SPD timings? I found that got me past an FSB wall at 380.
Also, try increasing the FSB, ICH, and MCH voltages slightly.
If after all that has been said has been done, and still no improvement, then I would say thats as far as your E6600 will go.
Still, have pity on folks like me who cant get past 3.4!
(My apostrophe button isnt working.)

 

[tareq]

Have you set the RAM to follow SPD timings? I found that got me past an FSB wall at 380.
Also, try increasing the FSB, ICH, and MCH voltages slightly.
If after all that has been said has been done, and still no improvement, then I would say thats as far as your E6600 will go.
Still, have pity on folks like me who cant get past 3.4!
(My apostrophe button isnt working.)

As i have said before the all of chipset V [expect teh FSB at 1.5v] is maxed out. And about the ram its ranning at its spd timing 444-12, i did try to relax the timing for 555-12 but wiht no luck to overclock furhter.

 

[tareq]

O, btw, I need the asus optional fan that comes with board. I found it at eBay for 15 bucks including shipping! However, this price tag is too expensive for that lousy fan. Does anyone know where to find it for cheaper? Or have a better solution to cool the asus chipset and CPU power regulators?

 

[Scooby2]

I have an Abit board not an Asus to go with my E6600. For me, nuding up the pcie clock up a few points really helped with my oc.

Currently only running at 3.5 but I'm pretty sure I can go a fair bit higher when my board gets a bios that allows it. I'm only running Corsair 5400c4 (set at 533 4,4,4,12) so I doubt its a RAM issue.

 

[tareq]

i did change the PCI to a 100 already, i dont think changing it further will be a good idea, anyone?

 

[Scooby2]

Again different board but I am running fine at 104. At 100 I could not get past 3.3ghz. (Fsb 365)

Pic

 

[tareq]

Not many 975X can beyond 400Mhz. It's a real gamble.
What you can do at most is do the usual things to get higher FSB assuming CPU cooling has been taken care of.

1. Give chipset-heatpipe-MOSFETsink the royal treatment
2. Slap a fan on it
3. vMCH mod to allow 1.90V for up to 480Mhz

OK, i thought of cooling the NB but as u know the heatsink is connected to heatpipe that goes around the cpu so i dont think its possible to upgrade that. plus how do i do the V mod? do u have a soultion of installing a better cooling method for the NB and MOSFET?

 

[shata]

Your whole system is fine. The thing is someone else can have your exact system specs ad get a better OC then you. You may have a better OC then sumone with your same setup. Each chip, CPU and RAM, is diffrent. So each system will OC diffrently.

Agreed. Every chunk of silicon is different. Personally, I don't know why you're complaining. You're mananging to squeeze more than 1 GHz above clockspeed out of that thing.

Yeah no joke when your getting like a 80% overclock thats fkin insane compared to before the c2d came out.

I mean your lucky like me when you buy a 4000+ and run it prime stable at 2.83ghz.

 

[1Tanker]

Not many 975X can beyond 400Mhz. It's a real gamble.
What you can do at most is do the usual things to get higher FSB assuming CPU cooling has been taken care of.

1. Give chipset-heatpipe-MOSFETsink the royal treatment
2. Slap a fan on it
3. vMCH mod to allow 1.90V for up to 480Mhz

OK, i thought of cooling the NB but as u know the heatsink is connected to heatpipe that goes around the cpu so i dont think its possible to upgrade that. plus how do i do the V mod? do u have a soultion of installing a better cooling method for the NB and MOSFET?
You clean the gunky TIM off and replace with any thermal paste you like. Only 50cent for a tube of slicon paste. And gasoline is free for cleaning use.

Basically all described here.I'm moving to NZ....gas is free there !!

 

[tareq]

looool, thanks guys for the help anyways.

 

[Swagman]

I have a question about Ram as well, Wusy just said you must stick to SPD on Asus Pw5 DH, which I have... these are my timings so far. I have a E6600 (all timings taken from CPU-Z)

I'm gradually upping my FSB so far I'm on

340.5 X 9 = 3064 Ghz
Rated FSB 1361.8

using 1.35 V Core

I have the Ram set to 1:1... and SPD on.. and at 1.9v as the spec for this memory says....

Now I have Corsair XMS2 800Mhz rated at 5/5/5/12.. but they say with SPD programmed at 5/5/5/15

http://www.corsairmemory.com/corsair/products/specs/TWIN2X1024A-6400.pdf

I'm sorry this is such a newbie question, but I'm learning so please bear with me..

In CPU-Z under the memory tab it says I'm running my memory at

340.5 MHz
1:1
5 cas
6 ras to cas
6 ras
18 cycle
24 bank cycle

now I dion't pretend to know what these mean, but shouldn't I try to run them at the quoted 5/5/5/12...

even in the SPD tab of CPU-Z in the timings table, it says at 400 Mhz the timings would be

5/5/5/18/24, so why doesn't this say 5/5/5/12 ?? or at least 5/5/5/15 like they say it's programmed at ?

Please any answer would be appreciated, this is my first OC