Baby OC

J

joeswm8

New Member
I am planning my first OC, and I was wondering what my core, mulitplier, and other factors should be, and also how to go about it.

I know some of the basics, but tell me if this is what I should do:

I am getting this:
Core 2 Duo E6300: 1.83GHZ stock w/ DDR2-800 Corsair RAM

What should I change the core and multiplier to if I want to get is to 2.00GHZ initially?

Is there a certain core speed increment, and is a certain core speed too high, is a certain multiplier too low/high?

And does the core:RAM speed ratio matter?

could I do: 800MHZ(core)x2.5(multiplier)=2.00GHZ
core:RAM speed = 1:1
memory clock = 2000/2.5 = 800MHZ

will this work?


Thanks
 
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as even people with the same components will tell you, your timings might not work for them and yours might not necessarily work for their computer...

i would suggest that you read Overclocking 101 and go from there...
 
You will want to up the FSB slowly until it doesn't boot, and then clear the CMOS (if it doesn't automatically fix itself) and change it to the last good configuration. Probably you won't need to change anything else other than the FSB to get it to 2.0.
 
Is a certain core speed too high, is a certain multiplier too low/high?

And does the core:RAM speed ratio matter, or any other ratios I should worry about?

What is the CMOS?


I did read the OC 101 and it doesnt really answer these questions, and it is a little old.
 
joeswm8 said:
I did read the OC 101 and it doesnt really answer these questions, and it is a little old.
Click to expand...

if it doesn't answer the questions for you... are you sure you really want to be overclocking a CPU??? do you really understand overclocking at all???
 
you know what? can you just answer the questions, the OC 101 is over a year old and I want these questions answered! jeez


Its not in there

These answers:


Is a certain core speed too high, is a certain multiplier too low/high?

And does the core:RAM speed ratio matter, or any other ratios I should worry about?

What is the CMOS?
 
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joeswm8 said:
you know what? can you just answer the questions, the OC 101 is over a year old and I want these questions answered! jeez
Click to expand...

easy tiger...

joeswm8 said:
Is a certain core speed too high, is a certain multiplier too low/high?

And does the core:RAM speed ratio matter, or any other ratios I should worry about?

What is the CMOS?
Click to expand...

First Question:
Praetor said:
How much can I OC my system by?
This has gotta to be one of the most common questions people ask about OCing and the answer is nobody can tell you. This should be somewhat evident from the previous question (i.e., if two "identical" systems have different ceilings than how can anyone tell you how much you can OC by?).
Click to expand...
in short, just what i've said before if you would read, is that nobody can give you an exact amount of how far/high/fast you can push your system before crashing...

Second Question:
yes it does... certain ratios will promote stability... then again, no single person will be able to tell you the optimum ratios... there also core voltage, memory dividers, stock memory timings, etc. to worry about...

Last Question:
definition of CMOS, it's usually accessed by pushing Delete during the POST stage...
 
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it's okay... read my above post... i edited it... hope that helps... sorry for not coming out right away and saying it either... i kinda avoided it and didn't really realize it... no worries i hope :)...
 
Lets start from scratch here.

First what you should do is raise the Bus speed ~40Mhz each time, then boot into Windows to make sure it's somewhat stable. Once you reach the point where it's not stable, you will need to increase a few voltages.

Now depending on the motherboard and chipset, these will differ. But a good voltage for a high OC would be to set the CPU to 1.40/1.45V, the FSB to 1.4/1.5V, and Northbridge to 1.4V/1.5V. (of course for starters, just raise the vcore up a bit, dont worry about the rest now)

You have DDR2-800 memory, so make sure you dont go above ~DDR2-850, unless you want to start raising those voltages and lowering timings.

To give you an example, this is what I used for mine:

CPU Bus: 447MHz
CPU FSB: 1789MHz
CPU Speed: 3130MHz
CPU Voltage: 1.400v
FSB Voltage: 1.500v
Northbridge Voltage: 1.500v

I have a high-end motherboard, so I have more option to choose from, you may not have all of those. As for the RAM, I set mine to Sync mode so right now its running at DDR2-900.
 
Thanks a ton for the answers, but I have three more quick questions:


Can I change it to any bus speed at all, or only to certain increments?

And I thought the FSB is what gets multiplied, not the bus speed, so what do the FSB and bus speed actually mean?

And does the bus speed to RAM speed ratio matter, and how would I change the RAM speed?

Because you(OMEGA) set your RAM speed to sync mode, what did it sync with?


Thanks Again
 
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joeswm8 said:
Thanks a ton for the answers, but I have three more quick questions:


Can I change it to any bus speed at all, or only to certain increments?

bus speed is the fsb X 4 in intel chips

And I thought the FSB is what gets multiplied, not the bus speed, so what do the FSB and bus speed actually mean?

fsb is the external clock of the cpu (what gets mulitplied by the multiplier to generate the clock of the cpu (266x7=1862mhz)

the bus speed is what moves info to various hardware (ram, cpu, gpu, nb etc)
it has to increase with the fsb for the overclock to work.

And does the bus speed to RAM speed ratio matter, and how would I change the RAM speed?

the ram speed depends on the cpu front side bus speed, NOT the system bus speed. As for the divider: cpu is at 400mhz fsb, running a ratio of 5:4, the ram wuld run at 320mhz or 640mhz DDR (400/5 x4 = 320 = 640 DDR)

Because you(OMEGA) set your RAM speed to sync mode, what did it sync with?

the fsb so the ratio is 1:1 (fsb of 450mhz = 450mhz or 900 mhz DDR)

DDR means double data rate so the clock is equal double the physical clock rate

Thanks Again\

:)
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AHH Im so confused!! Omega said:

[-0MEGA-];512051 said:
To give you an example, this is what I used for mine:

CPU Bus: 447MHz
CPU FSB: 1789MHz
CPU Speed: 3130MHz
CPU Voltage: 1.400v
FSB Voltage: 1.500v
Northbridge Voltage: 1.500v
Click to expand...

OMEGA said his FSB is 1789MHZ, but Bradan just said that the FSB is what gets multiplied by the multiplier to get the clock of the CPU, but that would be what OMEGA called the bus speed. Brandan and OMEGA just contradicted each other then, and now I am confused...

You guys each said the opposite definitions of each other for the bus speed and FSB speed, so which one is which?
 
yes he was wrong sorry
he accidently interchanged fsb and bus speed

bus will always be much higher than fsb

open cpuz
my fsb is 220 my bus is 880

OR google will be friendly
 
Wait, I think you are wrong, Bradan, because I just checked CPUZ and my bus speed is 99.7MHZ, my multiplier is 16, my CPU is 1595MHZ, and my FSB is 399MHZ, so I believe you are wrong (i know the computer is bad, its old)

i dont get it.....
 
joeswm8 said:
Wait, I think you are wrong, Bradan, because I just checked CPUZ and my bus speed is 99.7MHZ, my multiplier is 16, my CPU is 1595MHZ, and my FSB is 399MHZ, so I believe you are wrong (i know the computer is bad, its old)

i dont get it.....
Click to expand...

Taking OMEGA's example and adapting it to yours:

CPU Bus: 100Mhz (some fluctuation is normal)
FSB: 400Mhz
CPU Speed: 1600Mhz

The CPU bus is what everything is based off of. FSB almost always equals 4x the CPU Bus (as OMEGA calls it, I still am searching for the correct term) for Intels, but AMD you can change it between 3x and 5x. CPU Speed is always a multiplier off of the CPU Bus. For instance, mine is 200Mhz x 14 = 2800Mhz.
 
finally, the true answer. So when you find what the CPU bus is actually called, can you tell me?


And one more question, what does the FSB do then, what is its purpose?
And is the divider then the FSB:RAM Speed or CPU Bus:RAM Speed?
 
its called the FRONT SIDE BUS or EXTERNAL CLOCK

FSB X MULTIPLER = CPU CLOCK

FSB X 4 = SYSTEM BUS (THE LITTLE COPPER LINES ON UR MOBO)

here is an example:
lets say the cpu:ram ratio is 3:2

FSB - 300 mhz
MULTIPLIER - 10
CPU FREQUENCEY - 3000 mhz (FSB X MULTI)
BUS - 1200 mhz (FSB X 4)
RAM - 200 mhz (FSB/3 X 2)

IN BIOS THE IT WILL BE SHOWN AS FSB:RAM OR CPU:RAM

jet is thinking the front side bus is the bus, it is not,

BUS = system bus which moves infor from northbride-->ram-->cpu--->gpu--->southbridge etc etc ect
it moves infro around the computer via the mobo (you can actually see the bus as little copper lines on the mobo)

ALL CLOCK FREQUENCEYS ARE DEPENDANT OF EACHOTHER, THERE IS ONE CLOCK GENERATOR.

LOOK --->
bus.jpg

THE PCI/AGP/PCI-E BUSES ARE ALSO DEPENDANT.
THAT IS WHY THEY HAVE IMPLEMENTED LOCKS ON THOSE BUSES SO YOU CAN OVERCLOCK WITHOUT MAKING THE FREQUENCEY SENSITIVE PCI/AGP/PCI-E BUSES CHANGE

hope that clears it up

intel processors have a quad pumped fsb too, so the actual 100 mhz fsb is shown as 400mhz

EDIT - The cpu bus you are reffering to is called the backside bus, this is within the cpu

CORRECT ME IF IM WRONG AND PLEASE BACK IT UP
 
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What I am saying is this: Many advertisers say that they have a 800Mhz FSB, when in reality it is 200Mhz that is 4 lanes wide. So, this is what I really mean:

FSB: 100Mhz
"FSB" (Like it would be marketed): 400Mhz
CPU Core Speed: 1600Mhz
CPU Multiplier: 16X

BTW, I am not stupid, and hopefully all the time you spent didn't go to waste..maybe you can find someone else to explain things to :)

joeswm8 said:
finally, the true answer. So when you find what the CPU bus is actually called, can you tell me?


And one more question, what does the FSB do then, what is its purpose?
And is the divider then the FSB:RAM Speed or CPU Bus:RAM Speed?
Click to expand...

The Divider is the ratio between the FSB and the RAM speed. The optimal ration is 1:1, but many others are used. For example, a Core 2 Duo system with DDR2 800 RAM:

FSB: 266 Mhz
Bus Speed: 1066Mhz
RAM Speed: 400Mhz
Divider: 2:3 (anyway, it is 1.5X)

EDIT - The cpu bus you are reffering to is called the backside bus, this is within the cpu
Click to expand...

No. Forgive me, but I hadn't totally gotten the names right, however, I know the relation between them. I stand corrected on the names.
 
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