E5200 and the RAM Divider

ben90

ben90

ben90

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OK so i have read the beginners guide to overclocking but i think the RAM divider (3:4 or 1:1 and all that stuff) is the only thing that is confusing me.

I take it the FSB is 200 for the E5200 (200 x 12.5), so if i used a 1:1 ratio that would give me 800MHz RAM speed, which is what the rated speed is for the RAM i've brought.

Is this correct? :( god this is confusing!:confused:
 
All you need to remember is to keep your ram at or as close as possible to it's rated speed. As you increase the fsb you increase the ram speed so depending on your motherboard you need to adjust the FSB to NB Strap (Asus boards)/System Memory Multiplier (Gigabyte boards) and/or the Dram Frequency (if available). Advanced settings on Gigabyte boards need to be accessed by pressing Ctrl+F1 on the main bios screen. They then become available in M.I.T.

With the E5200 you need to make full use of the 12.5x multiplier and increase the fsb to overclock as they do not like high fsb's. Do not use more than 1.4v vcore either.
 
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Err, no that isn't right.

If you run the RAM divider at 1:1 you'll be underclocking the RAM at 200MHz!
Yes the FSB is quad pumped but to get the right RAM to FSB speed you need to look at their base frequencies. So 200 MHz for the FSB & 400 MHz for the RAM (DDR 800 MHz).

You need to run your RAM on the 1:2 divider (that ought to be multiplier really :p), in other words the RAM is running twice the frequency of the FSB for your CPU.

Anyway if you o/c that 5200 LMK what you get out of it as I'm getting one soon :).
 
Lumeycom, I have the same chip & motherboard as you. Could you post your bios settings please?

Mainly the 'softmenu' page settings and 'advanced/cpuconfiguration' settings. It would be cool if you could as it will maybe help me with my settings:)
 
That might not work, each mbrd & each CPU (even the same models) can have different needs, particularly where voltage is concerned.

You're just going to have to do it the hard way, bump up the FSB & do a quick 5min OCCT test, if it passes bump it up further, when it fails either drop the FSB or bump up vcore, if that doesn't help try NBv instead. When you've reached your 'ideal' spot then do a proper 24hr OCCT test. I'm sure the overclocking sticky here goes through all that :p;).
 
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Thanks for your input Assim:rolleyes:

I am well aware of the basics of overclocking but not on an Abit board so upping fsb/vcore is what I have already done.

I am more interested in his settings to see 'other' things like what divider he is using, also what his gltref, pwm load line function & hardware prefetcher settings are & do.
 
Ok, looks like I'd missed your 2nd line originally, although you hadn't said you'd tried vcore & FSB, nm.
Still more or less the same principles applie to other settings too, like NBv/MCH, but yes it's interesting to see other peoples setup.
 
Nothing wrong with running RAM at higher than rated speed by just overclocking the FSB. Some of my best results in the past have always relied on faster FSB/RAM speed in comparison to raw clock speed.

I'm getting naughty and sniffing around overclocking threads again. I mustn't buy anything until windows 7!
 
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