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OC'ing advice regarding DDR2 ram

post #1 of 11
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Hi, I'm planning to upgrade my RAM in order to further push my CPU overclock.

Right now I believe my 2gb kensington 667 ddr2 ram is bottle necking my system and it's ability to overclock higher than 2.66ghz from the stock 2.40ghz. My mobo can take maximum 4gb so I want to make it count but I don't want to go overboard on the RAM speed either.

I read that my e4600 can be pushed to 3.0ghz+ but which RAM should I get for it - 800mhz or 1066mhz type in order to properly overclock? Will I see a big leap in performance going from 667 to 800 or is it not significant enough and I should just go with 1066 for maximum damage?

Please advise
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post #2 of 11
800 mhz wont be to big of a step up, so if your willing to get 1066 then that's a decent upgrade and the headroom will be bigger

This would be good,
http://www.newegg.com/Product/Produc...82E16820104098
post #3 of 11
i would go for the fastest i could afford,667-800 is negligible,but if you were pushing your FSB and RAM further,then 667-1150 is heading towards double the original throughput,is it worth it?a faster cpu may be more beneficial...it's your call
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post #4 of 11
Thread Starter 
Quote:
Originally Posted by Yumyums View Post
800 mhz wont be to big of a step up, so if your willing to get 1066 then that's a decent upgrade and the headroom will be bigger

This would be good,
http://www.newegg.com/Product/Produc...82E16820104098
Thanks for the replies I think I'll go with the faster 1066 and I was looking at this exact same RAM yesterday but the only problem is that I'm in Canada and theres no mail in rebate on that for the canadian newegg

anyway thanks for teh advice guys

EDIT: which one would you guys recommend G.skill or kensington hyper x?

http://www.newegg.ca/Product/Product...82E16820104073

or

http://www.newegg.ca/Product/Product...82E16820231166
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post #5 of 11
The E4600 has a multiplier of 12.
You should be able to run it at 4 GHz, without overclocking Your RAM, if the CPU can handle it.
Reduce DRAM frequency in BIOS before You continue overclocking Your CPU.
I'm not familiar with that MB, so I can't tell You exactly how it's done.
Is Your RAM CAS 5? (5-5-5-15 or something like that.)
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post #6 of 11
Thread Starter 
Quote:
Originally Posted by Loke_h View Post
The E4600 has a multiplier of 12.
You should be able to run it at 4 GHz, without overclocking Your RAM, if the CPU can handle it.
Reduce DRAM frequency in BIOS before You continue overclocking Your CPU.
I'm not familiar with that MB, so I can't tell You exactly how it's done.
Is Your RAM CAS 5? (5-5-5-15 or something like that.)
4ghz?! wowawiwa that would be awesome if I could actually manage to OC it that high . But my mobo is another story cuz it has a fbus limit of 250 so I can't go above 3GHZ with x12 multiplyer

and yea those are my RAM timings I will try to drop the DRAM freq and go above 222 fb with this RAM to see what I get.

input appreciated =D

EDIT: Ok I set the DRAM @ 4-4-4-12 and tried bumping the fsb to 230 and it still refuses to work. I also tried bumping the voltage to 1.5v and still the same old story, the mobo resets the settings(other than RAM) to default.

3-3-3-9 is no go I tried it the other day and it really messed my ram up, mobo refused to detect it so I had to manually reload the bios by removing the battery and cut my damn index finger while trying to find it
Edited by Necrobutcher - 5/7/11 at 6:07pm
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post #7 of 11
4 GHz is just a theoretical limit (before You have to overclock Your RAM)
How far You can push it depends on voltage, MB, CPU (some just require a lot of voltage to run at high frequencies)

FSB Limit of 250? That sucks!
3GHz max then.

Keep RAM timings at 5-5-5-15 and DRAM frequency low until You found max FSB.
When You're done overclocking the CPU, You can start pushing Your RAM.
You can try to run them at 750(375), if the MB will do FSB 250.
Do some stresstesting to make sure it's stable.

Also check the Voltage of Your CPU.
You should need about 1.3-1.4V at 3GHz, maybe less if You have a good CPU.

EDIT:
Good news.
Did some research.
Seems like Your MB will do at least FSB 333.
I'll see if I can find the manual.

*:
FOX Intelligent Stepping to Manual.
DRAM Timing Selectable to manual. 5-5-5-15, 533
Increase CPU Clock to 266 to reach 3 GHz.
PCI Express Clock to 100

CPU Voltage Regulator to Manual. - Does it say 1.xxx Volt, or + x.xx Volt?
If it's says 1.xxx Volt, increase it to 1.4V. (This should be a safe voltage and if You're using the stock cooler it should be able to handle the heat)

Check if it's stable before increasing FSB. (Small steps (5-10), and stresstest to see if it's stable.)
If it's stable and the temperatures are OK, continue increasing FSB.
Check real CPU Voltage during idle and load with FOX One or CPU-Z f.ex.
If it drops a lot, increase it a bit in BIOS.
(Below 1.5 V should be safe, but try to keep the voltage during load as low as possible, to reduce heat.)
Edited by Loke_h - 5/8/11 at 7:05am
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post #8 of 11
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My CPU voltage regulator is as such

+0.0125V
+0.0250V
+0.0375V
...
+0.1125V
+0.1250V
+0.1375V
...
+0.1875V
+0.2000V

Don't know which voltage to set it so that it's equivalent to 1.4v, because each option incrementally increases by 0.0125v so there is no 0.14**V and I'm not even sure if that is the equivalent.

My DRAM voltage regulator has only 4 options, Default +0.10V, +0.20V and +0.30V and if it's any clue I have Spread Spectrum & Ratio Free @ disabled

As for my mobo, I made a mistake, it actually says Min 200 Max 265 FSB, will that number increase if I get some better RAM or am I doing it wrong.

sorry I'm just a baby overclocker and I really appreciate the advice.

EDIT:
I reverted the timings to 5-5-5-15 and set the voltage @ +0.1375V along with a +5 in fsb and surprise surprise... it didn't work again =(
Edited by Necrobutcher - 5/8/11 at 10:09am
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post #9 of 11
Check CPU VCore under PC Health Status in BIOS, or with software in Windows, before You increase VCore.
No need to increase DRAM Voltage unless You're overclocking the RAM.
266 Max FSB , but it also says it can handle FSB 333 overclocked.

What is Your FSB, DRAM frequency?
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post #10 of 11
Thread Starter 
Quote:
Originally Posted by Loke_h View Post
Check CPU VCore under PC Health Status in BIOS, or with software in Windows, before You increase VCore.
No need to increase DRAM Voltage unless You're overclocking the RAM.
266 Max FSB , but it also says it can handle FSB 333 overclocked.

What is Your FSB, DRAM frequency?
VID is 1.3125v
FSB freq is at 888mhz and DRAM @ 741mhz
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