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Old March 12, 2007, 06:19 PM
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Default What is the RAM ratio frequency?

What is the RAM ratio and what is the guide line for OC?

My memory is clocked at 667 MHz, what will be my RAM ratio?
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Old March 12, 2007, 09:16 PM
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intel or amd. guessing intel from your sig. your ram ratio will be whatever you set it to. 667 ddr2=333.5 real speed. you could run it 1:1 and get a decent oc with the ram running stock
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Old March 12, 2007, 09:20 PM
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Don't the latest batch of boards have the memory completely de-linked from the fsb, or is that just one of the chipsets?
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Old March 12, 2007, 09:21 PM
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just the r600 chipset
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Old March 12, 2007, 09:53 PM
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and the 680i is unlinkable
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Old March 12, 2007, 10:15 PM
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Quote:
Originally Posted by flclisgreat View Post
intel or amd. guessing intel from your sig. your ram ratio will be whatever you set it to. 667 ddr2=333.5 real speed. you could run it 1:1 and get a decent oc with the ram running stock
So 1:1 ...this is the ratio of 333.5 MHz which is the real speed with what? Is it the FSB frequency?
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Old March 12, 2007, 10:25 PM
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Yessir
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Old March 13, 2007, 01:50 PM
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1-1 means that you are running the memory at the speed divider/multiplier of fsb that it's designed to work at. (Similar to an AMD proc divider.... fsb stays @ 200 for all of the cpus, but higher end cpus run at a higher multiplier..... so a 2g chip runs @ 200X10, while a 2.4g chip runs @ 200X12).

Mem & cpu speeds are related to fsb, but it's not always a direct relation. It's often a multipler or divisor of the fsb.

Unless your memory can be de-linked from fsb, your mem is going to go up above it's normal settings with raises to fsb.

The purpose of mem dividers (sometimes listed as mem speeds such as ddr 533/ddr66X/ddr800 etc..., or also sometimes listed as a divider ie 5/6, 2/3, etc...) is to drop your mem down below it's normal operating speeds in relation to the fsb @ stock speeds so that differing levels of oc can be applied to the cpu & mem.

This allows you to get as close to the optimum OC for both the cpu & the mem without driving one or the other above a stable OC.

Does that make sense? The concept can be a bit hard to get a grip on at first, but once you see the light it becomes second nature.... :)
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Last edited by sswilson; March 13, 2007 at 01:54 PM.
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Old March 13, 2007, 01:57 PM
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They say that 1:1 offers the most stable overclock, so that if your memory can handle it, you cn acheive better performance when it's locked in at 1:1- My mobo unlocks, which is good for me, as my memory wont go much over 800MHz so when my cpu is clocked to 3800, that would mean that my memory would have to run at 900 MHz (450fsb X 2): the CPU is at 450fsb X 8= 3800. If you have a good set of 667, it can overclock to 800 so you can run it at 1:1 and get 3200MHz out of your CPU- but cheap stuff will limit you.

EDIT: I just remembered that you're running a Q6700 so wherever I use 8X, you use 12X- although you multiplier is unlocked, isn't it?

Last edited by Babrbarossa; March 13, 2007 at 02:03 PM.
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Old March 13, 2007, 01:59 PM
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Quote:
Originally Posted by sswilson View Post
1-1 means that you are running the memory at the speed divider/multiplier of fsb that it's designed to work at.

Unless your memory can be de-linked from fsb, your mem is going to go up above it's normal settings with raises to fsb.

The purpose of mem dividers (sometimes listed as mem speeds such as ddr 533/ddr66X/ddr800 etc..., or also sometimes listed as a divider ie 5/6, 2/3, etc...) is to drop your mem down below it's normal operating speeds in relation to the fsb @ stock speeds so that differing levels of oc can be applied to the cpu & mem.

This allows you to get as close to the optimum OC for both the cpu & the mem without driving one or the other above a stable OC.

Does that make sense? The concept can be a bit hard to get a grip on at first, but once you see the light it becomes second nature.... :)
I had a bit of a hard time with dividers when I moved from AXP to 939, AXP's were all about 1:1 ratio then with the a64 that all changed, dividers became the ****. I guess I'm a dinosaur as I still try to run my ram @1:1 and only use dividers when finding my cpu overclock.
And yes it becomes second nature, I used to use A64 divider helper now pfft what for it's easier to do in my head.
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