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> Fundamentals of Overclocking, NEWBIES PLS READ THIS BEFORE POSTING

J-Slade
post Dec 24 2006, 01:50 PM
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RAM Handbook

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In most motherboards, numerous settings can be found to optimize your memory. These settings are often found the Advanced Chipset section of the popular award bioses. In certain instances, the settings maybe placed in odd locations, so please consult your motherboard manual for specific information. Below are common latency options:
Command rate - is the delay (in clock cycles) between when chip select is asserted (i.e. the RAM is selected) and commands (i.e. Activate Row) can be issued to the RAM. Typical values are 1T (one clock cycle) and 2T (two clock cycles).

CAS (Column Address Strobe or Column Address Select) - is the number of clock cycles (or Ticks, denoted with T) between the issuance of the READ command and when the data arrives at the data bus. Memory can be visualized as a table of cell locations and the CAS delay is invoked every time the column changes, which is more often than row changing.

tRP (RAS Precharge Delay)
- is the speed or length of time that it takes DRAM to terminate one row access and start another. In simpler terms, it means switching memory banks.

tRCD (RAS (Row Access Strobe) to CAS delay) - As it says it's the time between RAS and CAS access, ie. the delay between when a memory bank is activated to when a read/write command is sent to that bank. Picture an Excel spreadsheet with a number across the top and along the left side. They numbers down the left side represent the Rows and the numbers across the top represent the Columns. The time it would take you, for example, to move down to Row 20 and across to Column 20 is RAS to CAS.

tRAS (Active to Precharge or Active Precharge Delay) - controls the length of the delay between the activation and precharge commands ---- basically how long after activation can the access cycle be started again. This influences row activation time which is taken into account when memory has hit the last column in a specific row, or when an entirely different memory location is requested.
These timings or delays occur in a particular order. When a Row of memory is activated to be read by the memory controller, there is a delay before the data on that Row is ready to be accessed, this is known as tRCD (RAS to CAS, or Row Address Strobe to Column Access Strobe delay). Once the contents of the row have been activated, a read command is sent, again by the memory controller, and the delay before it starts actually reading is the CAS (Column Access Strobe) latency. When reading is complete, the Row of data must be de-activated, which requires another delay, known as tRP (RAS Precharge), before another Row can be activated. The final value is tRAS, which occurs whenever the controller has to address different rows in a RAM chip. Once a row is activated, it cannot be de-activated until the delay of tRAS is over.


This post has been edited by J-Slade: Dec 24 2006, 01:50 PM
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vailance
post Dec 24 2006, 02:41 PM
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woot! thx.. ive done my ram oc.. now running test.. dunno stable or not.. manage to go 2-3-2-6 .. if go for 2-2-2-5 will boot for a while only then restart.. maybe i need to set voltage to high? current is normal state.
or i set to auto?
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PVCpipe
post Dec 24 2006, 06:37 PM
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how do u test the ram ?.... why people burn ram?
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bobtiang
post Dec 29 2006, 04:54 PM
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hi guys, i have a trouble booting up my PC after trying to mod the timing from 2.5, 3, 3, 6 to 2.5, 2, 2, 6

now it just show me big black blank screen... sad.gif
how do i tell the mobo to reset?

take out CMOS battery or dunno what jumper thingy?
please help ..... i lost my lovely desktop ...
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karom
post Dec 30 2006, 09:44 PM
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I am a AMD FX-62 user. I suddenly faced system crashed problem as my CPU clock rise 5% from its original clock. May i know the how to properly clock the CPU without crashing the system?
And to what certain extend do i have to check in order to make sure that the clock is already stable.
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akachester
post Jan 1 2007, 05:47 PM
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I just recently change my processor to the AMD Opteron 165.I heard that the Opteron is quite a good OCer but i am a pure noob in term of OC.Can anyone give me some guidelines on where should i start and what i need?

I have read the first few post which was really helpful.Would those AMD64 OCing guide can still be applied to the Opteron?
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akachester
post Jan 4 2007, 07:47 PM
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Hi, i had recently tried to OC my Opty 165.I never tried OC before and had read several article posted in the first post to learn how to do so.Anyway, from what i learned, i could OC my proc simply by changing the Clock Frequency of my proc which is at default 200Mhz..

Anyway, there is a problem.When i pushed my Clock Frequency to 210Mhz, it already cant boot into windows.Keep on restarting.What might be the problem now?What else should i change in order to clock even higher?What might be holding my OC from going up?

This is my spec :

AMD Opteron 165
2 * 512 Corsair PC3200 Pro LED (3-3-3-8)
Gigabyte K8N-SLI
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kalakatu
post Jan 5 2007, 01:09 AM
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QUOTE(bobtiang @ Dec 29 2006, 04:54 PM)
hi guys, i have a trouble booting up my PC after trying to mod the timing from 2.5, 3, 3, 6 to 2.5, 2, 2, 6

now it just show me big black blank screen...  sad.gif
how do i tell the mobo to reset?

take out CMOS battery or dunno what jumper thingy?
please help ..... i lost my lovely desktop ...
*



both methods also can do..but juz do either one only..
normally when u set ur ram timing lower,u have to lower ur ram frequency also..unless if u use a high performance ram..
so lower ur frequency,maybe to 266mhz,133mhz or lower..
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gtoforce
post Jan 8 2007, 12:38 AM
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believe it or not
i never oc my fx
i dunno bout the unlocked multiplier
haha
but never really believed in oc'ing

*just spamming*
haha

thanx
bye
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sHawTY
post Jan 8 2007, 12:58 AM
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Guys, one question here, before this, i'm using an ATI X1800XL card, so i can use ATI Tool to manage the card, however, i didn't use ATI Tool to overclock my graphic card as i'm afraid of losing my graphic card... sweat.gif

**However, my afraid of overclocking doesn't attached to overclocking CPU & Rams laugh.gif

The question is, i can use ATI Tool to set my graphic card heatsink fan to run at maximum speed 24/7, this is my question, is there any software that i can use to set my graphic card heatsink fan to run at maximum speed just like what ATI Tool did for my X1800XL?

Can i use ATI Tool for that purpose? blink.gif

Help me... icon_question.gif
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goldfries
post Jan 8 2007, 01:14 AM
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QUOTE(sHawTY @ Jan 8 2007, 12:58 AM)
The question is, i can use ATI Tool to set my graphic card heatsink fan to run at maximum speed 24/7, this is my question, is there any software that i can use to set my graphic card heatsink fan to run at maximum speed just like what ATI Tool did for my X1800XL?

Can i use ATI Tool for that purpose? blink.gif

Help me... icon_question.gif
*



ouhh kay. can you help us understand what you just said? biggrin.gif

1. i can use ATI Tool to set my graphic card heatsink fan to run at maximum speed 24/7,
2. is there any software that i can use to set my graphic card heatsink fan to run at maximum speed just like what ATI Tool did for my X1800XL

erm........me confused.
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sHawTY
post Jan 8 2007, 01:20 AM
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QUOTE(goldfries @ Jan 8 2007, 01:14 AM)
ouhh kay. can you help us understand what you just said? biggrin.gif

1. i can use ATI Tool to set my graphic card heatsink fan to run at maximum speed 24/7,
2. is there any software that i can use to set my graphic card heatsink fan to run at maximum speed just like what ATI Tool did for my X1800XL

erm........me confused.
*



Hmm...
How can i explain it sweat.gif

Ok, before this, i'm using an ATI X1800XL card for my pc, and i'm using ATI Tool to control the heatsink fan speed to run at the maximum speed all the time when the pc is turned on...

And right now, i've changed my X1800XL to Nvidia 7900GT, my question is, is there any software that can do the job like the ATI tool?

What i meant is, is there any software that can be used to control the fan speed on my stock heatsink fan for my 7900GT?

Right now, i'm using Riva Tuner, but i don't quite understand that program as it's rather confusing me more than the ATI tool, ATI tool is quite easy to understand while Riva Tuner is bringing me a headache... rclxub.gif

Ni kalau soalan aku still memeningkan, terpaksa la aku tulis dalam bahasa melayu plak... laugh.gif

Edit: Can i use ATI Tool on my Nvidia 7900GT card?
I'm not going to overclock my card, as i'm afraid of losing my graphic card, i just want the fan speed on the stock heatsink to run at maximum speed, that's all... notworthy.gif

This post has been edited by sHawTY: Jan 8 2007, 01:26 AM
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goldfries
post Jan 8 2007, 01:26 AM
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QUOTE(sHawTY @ Jan 8 2007, 01:20 AM)
And right now, i've changed my X1800XL to Nvidia 7900GT, my question is, is there any software that can do the job like the ATI tool?

What i meant is, is there any software that can be used to control the fan speed on my stock heatsink fan for my 7900GT?


tu la, you change to 7900GT but you didn't say mah. biggrin.gif your siggy also not updated......still MSI ATI Radeon X1800XL Crossfire :: Arctic Cooling Accelero X2 tongue.gif

now you understand why confusing? smile.gif

anyway, have you tried nVidia Control Panel? it allows you to set 2D / 3D mode fan speed.
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sHawTY
post Jan 8 2007, 01:29 AM
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QUOTE(goldfries @ Jan 8 2007, 01:26 AM)
tu la, you change to 7900GT but you didn't say mah. biggrin.gif your siggy also not updated......still MSI ATI Radeon X1800XL Crossfire :: Arctic Cooling Accelero X2 tongue.gif

now you understand why confusing? smile.gif

anyway, have you tried nVidia Control Panel? it allows you to set 2D / 3D mode fan speed.
*



I'm trying to understand the control panel, but there's too many tabs, and i can't find it, where does it stated?

Sorry, newbie sangat ni, dalam hidup aku baru dua kali aku guna Nvidia nye graphic card... sweat.gif

Help me... icon_question.gif icon_question.gif

Edit: one more question:
Can i use SLi 7900GT on my Asus P5WD2-E Premium motherboard?
[It's using Intel 975X chipset and it only supports crossfire but not SLi]
I've heard that there is some motherboard bios modification that can be done to enable my motherboard to run SLi mode rather than just Crossfire.
Or is it Nvidia Driver mod? blink.gif

Help Me, really newbie in using Nvidia Cards... sweat.gif sweat.gif

This post has been edited by sHawTY: Jan 8 2007, 01:33 AM
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goldfries
post Jan 8 2007, 01:44 AM
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QUOTE(sHawTY @ Jan 8 2007, 01:29 AM)
I'm trying to understand the control panel, but there's too many tabs, and i can't find it, where does it stated?


erm. yeah that darn panel very confusing. keep a look out for Adjust GPU Setting. you might have to click Change Display Configuration or whater first. smile.gif

i donno about the SLI part.

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sHawTY
post Jan 8 2007, 02:33 AM
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QUOTE(goldfries @ Jan 8 2007, 01:44 AM)
erm. yeah that darn panel very confusing. keep a look out for Adjust GPU Setting. you might have to click Change Display Configuration or whater first. smile.gif

i donno about the SLI part.
*



Can't find it... sweat.gif
Before this, i've used a 7600GT before, IINM, even the overclocking menu can be easily found, but right now after i've switched to 7900GT, it's nowhere to be found... sweat.gif

Anyone can help me by giving a screenshot on where should i find that thing? sweat.gif
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goldfries
post Jan 8 2007, 03:06 AM
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QUOTE(sHawTY @ Jan 8 2007, 02:33 AM)
Can't find it... sweat.gif
Before this, i've used a 7600GT before, IINM, even the overclocking menu can be easily found, but right now after i've switched to 7900GT, it's nowhere to be found... sweat.gif

Anyone can help me by giving a screenshot on where should i find that thing? sweat.gif
*



hehe. i face same problem with you. my previous interface and current interface like different tongue.gif

mine's using Forceware 91.31 and Control Panel 1.2.1.32
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s[H]sIkuA
post Jan 8 2007, 06:32 AM
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QUOTE(goldfries @ Jan 8 2007, 03:06 AM)
hehe. i face same problem with you. my previous interface and current interface like different tongue.gif

mine's using Forceware 91.31 and Control Panel 1.2.1.32
*



BTW goldfries, the CP u mean is the new nvidia 1, why got different version? The new CP is so confusing for me too rclxub.gif , I still using the old CP (can choose) btw tongue.gif

And shawty, I am 99.999% sure your board won't run SLI , AFAIK, 965/975x dont support SLI ,only Xfire wink.gif

This post has been edited by s[H]sIkuA: Jan 8 2007, 06:34 AM
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goldfries
post Jan 8 2007, 06:36 AM
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QUOTE(s[H]sIkuA @ Jan 8 2007, 06:32 AM)
BTW goldfries, the CP u mean is the new nvidia 1, why got different version? The new CP is so confusing for me too  rclxub.gif , I still using the old CP (can choose) btw  tongue.gif
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i donno ler. it's something i install with the card and never bother to open. tongue.gif

in fact i never liked NV's CP. there's classic version some more........... that one you access using Desktop > Properties > Advanced blabalbal while another you use something that come out like Windows folders.
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s[H]sIkuA
post Jan 8 2007, 06:39 AM
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Yes, the windows folders interface ,that one is darn confusing , with all the eye candy , i still prefer the old and easy Tab version thumbup.gif
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