overclocking q6600 to 3.0ghz

WingZero30 · 3 Dec 2010 at 19:17

cablebaron said:
sorry for the ridiculus sizes

to confirm to change vcore to 1.35v am i changing "chipset over voltage" as there is no cpu vcore option in my bios

Hi cable

Can't you change the 'cpu voltage' as stated in the bios info? Usually that is cpu vcore

. You should also disable 'Intel speed step' otherwise known as EIST when overclocking. So your cpu speed will stay the same during idle and load. Otherwise when stressing your cpu with prime95, these powersaving features kind of throttle your cpu and it can't utilise it's full potential at doing those calculations

.

cablebaron · 3 Dec 2010 at 19:20

the first post is what i thought my bios would say but instead i have the following options only, but i don't know what any of them relate to:
AUTO PSI (ENABLED)
SB VOLTAGE (AUTO)
MEMORY OVER VOLTAGE (AUTO)
CHIPSET OVER VOLTAGE (AUTO)
VTT OVER VOLTAGE (AUTO)
CPU VCORE OVER-VOLTAGE (AUTO)
CPU SPREAD SPECTRUM (AUTO)
PCI SPREAD SPECTRUM (AUTO)
CPU CLOCK SKEW (AUTO)
NB CLOCK SKEW (AUTO)
CPU MARGIN ENHANCEMENT (OPTIMISED)

WingZero30 · 3 Dec 2010 at 19:27

cablebaron said:
the first post is what i thought my bios would say but instead i have the following options only, but i don't know what any of them relate to:
AUTO PSI (ENABLED)
SB VOLTAGE (AUTO)
MEMORY OVER VOLTAGE (AUTO)
CHIPSET OVER VOLTAGE (AUTO)
VTT OVER VOLTAGE (AUTO)
CPU VCORE OVER-VOLTAGE (AUTO)
CPU SPREAD SPECTRUM (AUTO)
PCI SPREAD SPECTRUM (AUTO)
CPU CLOCK SKEW (AUTO)
NB CLOCK SKEW (AUTO)
CPU MARGIN ENHANCEMENT (OPTIMISED)

I don't know all of them as I am not very familiar with asus mobos but the following are the common terms which I have specified.

AUTO PSI (ENABLED)
SB VOLTAGE (AUTO) Southbridge Voltage
MEMORY OVER VOLTAGE (AUTO) Ram voltage
CHIPSET OVER VOLTAGE (AUTO) Northbridge (MCH) voltage
VTT OVER VOLTAGE (AUTO) Cpu termination voltage
CPU VCORE OVER-VOLTAGE (AUTO) CPU Vcore

CPU SPREAD SPECTRUM (AUTO)
PCI SPREAD SPECTRUM (AUTO)
CPU CLOCK SKEW (AUTO)
NB CLOCK SKEW (AUTO)
CPU MARGIN ENHANCEMENT (OPTIMISED)

Cpu vcore over voltage is the cpu vcore

. The 'over voltage' can be confusing. Not sure about other terms.

cablebaron · 3 Dec 2010 at 20:00

i have tried changing cpu vcore over voltage to 1.35v and it automatically adjusts to 0.63000v. it shows on the right hand side of the bios when selected, "min 0.01000v max 0.63000v increments of 0.00625v

WingZero30 · 3 Dec 2010 at 20:32

cablebaron said:
i have tried changing cpu vcore over voltage to 1.35v and it automatically adjusts to 0.63000v. it shows on the right hand side of the bios when selected, "min 0.01000v max 0.63000v increments of 0.00625v

I am guessing that you have (0.63-0.01)/0.00625=99.2 =99 increments of 0.00625v.

Now your VID will be set within the intel/mobo specification range which is 0.85v-1.5v for Q6600. Now 1.5-0.85 = 0.65v which slightly varies from your mobo specification. If you divide; 0.65/0.00625 = 104 increments or notches of cpu vcore.

So if your VID is 1.2875v then roughly

0.85v ................................................1.2875v..................1.5v

70 increments between 1.2875v and 0.85v
34 increments between 1.5v and 1.2875v

1.2875-0.85 = 0.4375v/0.00625v = 70 increments of 0.00625v
1.5 -1.2875 = 0.2125/0.00625 = 34 increments of 0.00625v

70 +34 = 104 increments as found out

.

It's just in your case it 99 increments instead of 104

So going by the figure if you add 34 increments of 0.00625v to your vid of 1.2875v then you will reach intel max specified of 1.5v

Like wise if you subtract 70 increments of 0.00625v from your 1.2875v, you will end up at 0.85v which is intel specified minimum.

So it will be like this:

1.2875v + 0.00625v = 1.29375v
1.29375v+ 0.00625v = 1.3v
etc
etc

Keep doing it until you reach 1.5v which is intel max specified. Ofcourse we don't want that. For 3.0GHz just manually set cpu vcore to 1.2875v and up the fsb to 333Ghz (well I do 334GHz) and make sure your ram stays at rated speed or lower by making use of memory multipliers if you can. I hope I am right

. Obviously needs input from people who are familiar with asus mobos

.

bainbridge · 3 Dec 2010 at 20:35

Your v-core is displayed as overvoltage so I guess rather than select the exact voltage you want your cpu to run at you select how much voltage you want to add to the stock voltage, you select the over voltage.

Big Wayne has suggested 1.35v, your VID (stock voltage) is 1.1625v so you need to over-volt by 0.1875

1.1625v
+ 0.1875v
= 1.3500v

Might be worth waiting for someone more knowledgeable than me to confirm this but I think it's what you need to do.

WingZero30 · 3 Dec 2010 at 20:45

bainbridge his true VID is 1.2875v. The 1.1625v is a 'false' idle value due to EIST and C1E

.

cablebaron said:
my vid in coretemp on idle is 1.1625v and running prime 95 it is 1.2875v.

bainbridge · 3 Dec 2010 at 20:50

Ahh!

I was confused about this earlier in the thread Wingman.

So to achieve vcore of 1.35v an over-voltage of .0625 is in order?

PS how did you deduce this from the above?

bainbridge · 3 Dec 2010 at 20:52

I thought the VID displayed in Coretemp is THE VID which won't change, regardless of what features are on (never used EIST Speedstep myself)

WingZero30 · 3 Dec 2010 at 21:07

bainbridge said:
Ahh!

I was confused about this earlier in the thread Wingman.

So to achieve vcore of 1.35v an over-voltage of .0625 is in order?

PS how did you deduce this from the above?

. In my gigabyte mobo each increment consists of 0.00625v. Afaik the total number of increments slightly varies from mobo to mobo. If you count the increments from 1.5v to 0.85v you will have 104 increments provided each contains difference of 0.00625v. It just in his case he should have 99 increments.
Also in my mobo I have values lower than 0.85v and they go up to 0.5v minimum. Whereas on the other end max cpu vcore is 1.8v. However after 1.5v there are only 3 or 4 increments which include 1.6v. I was counting the number of increments in the bios and they go over 160.

Like I said I am not familiar with asus mobos but going by what Big Wayne is telling him he will need the amount you specified.

bainbridge said:
I thought the VID displayed in Coretemp is THE VID which won't change, regardless of what features are on (never used EIST Speedstep myself)

True but if you have EIST and C1E on and you turn on the computer especially in the morning, sometimes coretemp will momentarily show 1.1625v. It happens to me aswell even though my true VID is 1.2625v

.