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Dividers for Newbies

post #1 of 16
Thread Starter 
Lets start with the basics:

What is a divider?

-A Divider is used when you need more FSB (HTT), but your ram just wont reach that speed.
-It can also be used if you want tighter timmings because lower fsb and lower timmings go hand in hand.


What do i look for to find my dividers in the Bios?


- It will most likely be under the names Dram Freq, or mem clock index What settings would I look for in my Bios?
- Most bios's will have thier Dividers in ratios, some have it in frequencies. Here is the frequency to ratio chart. Some bios's will display their ram in double data ie: 200 could be seen as 400.
Freq Dram:FSB
200/100 1:2
240/120 3:5
266/133 2:3
280/140 7:10
300/150 3:4
332/166 5:6
360180 9:10
400/200 1:1

Okay, I see the chart, but I still dont understand how 100mhz is 1:2 of 300htt.

- Your Dram (actual ram speed) is not being set to 100mhz. Its frequency is being set to 100mhz.
- The default frequency of ram is 200mhz. now running it at 100mhz gives you a ratio of 100:200 or 1:2. - Your ram will not sit at 100mhz, it will increase accordingly to your htt(fsb) keeping it's 1:2 ratio

How do dividers effect performance?

- Contrary to popular belief, running a divider can infact enhance performance.
- For the new Overclocker, a 1:1 ram to cpu ratio is optimal.
- For the Advanced Overclocker, a 1:1 may not be the best. It may be better to run a lower fsb to yeild tighter timmings. The trick to this is no easy answer. The only way to find the totally optimal settings is to try many different settings.

Does different ram work better with dividers than others?

- Yes, Different types of ram are a big part in dividers
For Example:
- TCCD will usually run very high fsb's with not the tightest timmings, which means its best to run a 1:1 divider
- BH-5 and CH-5 are high voltage ram that run low fsb(250ish) but can hold 2-2-2-5 timmings, this is best to run a divider but keeping the ultra tight timmings. -drop me a pm


Still dont quite understand, or If i have left something out.

-Drop me a pm.
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post #2 of 16
This is very helpful bro!
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post #3 of 16
Thread Starter 
Thanks for the feed back! Keep it comming positive or not guys.
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post #4 of 16
great chart, exactly what i needed.
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post #5 of 16
I got confused with dividers alot so thank you

PetrolHead
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post #6 of 16
Thread Starter 
Okay, i've gotten some questions about performance and dividers, so I put in some more information about that. Keep questions comming, I want to try and answer as much as possible.
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post #7 of 16
Iny my BIOS, setting the ram frequency to 400mhz will be a 1:1 ratio, and setting to 200 will be a 1:2 ratio.
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post #8 of 16
Thread Starter 
Easy way to explain that is that you are seeing the ram in double data rate.
so what i had written down as 200 you will see as 400, and so fourth, I re wrote the chart so it will fit the bios's like yours.
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post #9 of 16
okay...thank you
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post #10 of 16
My bios has those dividers but it also has dividers like 3:2 ,4:3, and 2:1. Why is that?
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