Sign-in / Sign-up
Your question

What type of memory for an OCed E6400?

Tags:
  • CPUs
  • Overclocking
  • Memory
  • Product
Last response: in CPUs
July 12, 2006 11:36:21 PM

I'm planning on buying an E6400 Core 2 Duo processor and overclocking it to 3.0 GHz (maybe higher, depending on if/how much I need to increase the voltage to push it further).

Could someone tell me what memory speed and timings I should be looking at? Could anyone suggest some guides online that could help make a sound choice? This will be the first time I've overclocked a PC so any help you can all provide would be greatly appreciated.

More about : type memory oced e6400

July 13, 2006 12:50:42 AM

3 ghz will require a FSB speed of 375 mhz 1500 mhz quad-pumped that may be hard to reach. To get to 3 Ghz and a FSB speed of 375 u should get DDR2 800 memory I recomend This Memory since it's got low latency .The default clock for the conroe is 266.5 mhz 1066 mhz quad pumped. So I would downclock the memory to 266.5mhz from 400 to be equal and start overclocking to your goal of 375+ mhz FSB.
July 13, 2006 1:02:20 AM

Quote:
I'm planning on buying an E6400 Core 2 Duo processor and overclocking it to 3.0 GHz (maybe higher, depending on if/how much I need to increase the voltage to push it further).

Could someone tell me what memory speed and timings I should be looking at? Could anyone suggest some guides online that could help make a sound choice? This will be the first time I've overclocked a PC so any help you can all provide would be greatly appreciated.


Because of the way the mem dividers works against the Intel FSB, you will need GOOD DDR2 800 at least - well actually AMD too. Turning up the FSB and adjusting the divider to 1:1 will mean 1066MHz RAM. Intel's site should have the dividers. I believe they are 1:1, 2:3, 4:5 with a few more for extreme cases. OCZ or Corsair will be the best bet.
Related resources
Can't find your answer ? Ask !
July 13, 2006 1:13:35 AM

No, ddr2 533 mhz is relavant to the 1066mhz FSB. U think thats only half but thats why theres dual channel, it fills in the gap. The conroe will never be able to use the bandwidth of 1066mhz ddr2. Unless it FSB is like running at 2132 mhz. The 1066 mhz ddr2 isnt worth the price. If you read the THG article on tight timings vs. high clock frequencies the 0.5 to 0.7 difference between them swayed back and forth depending on how performnce scales.
July 13, 2006 1:41:32 AM

Quote:
No, ddr2 533 mhz is relavant to the 1066mhz FSB. U think thats only half but thats why theres dual channel, it fills in the gap. The conroe will never be able to use the bandwidth of 1066mhz ddr2. Unless it FSB is like running at 2132 mhz.



The issue is not the speed but the divider. I haven't use Intel for awhile and don't know what the mem dividers are for Core 2 chipsets. If you pump the bus up from 1066 it will no longer be an integer divisible speed for 533. The price of 800 is coming down for CAS5 - Core 2 doesn't need more - and running higher stably is the point.

It maybe possible for him to clock the bus at 1333 so 667 will give the best perf. CAS4 does give some increases and most CAS5 800 will run CAS4 667.
July 13, 2006 2:25:29 AM

I told him to get DDR2 800mhz and down clock it to match his bus and tighten the timings. And then as he overclocks the FSB the ram speed should increase with it. So if he downclocks the ddr2 800mhz ram to run at 533mhz when he overclocks his FSB to like 333.5mhz 1333 mhz quad-pumped his ram should also speed up with it to 667 mhz. And if he clocks it to 375 mhz to get his 3 ghz the memory should be running at 750 mhz. Hopefully still at the tighter timings but I doubt it. I think thats how it should work but I have no real world experience since im 15 and cant afford a computer that can do such things on which I can try it on. :( 
July 13, 2006 12:55:36 PM

I found a board that should work great if you overclock to 375 mhz 1500mhz quad-pumped . Click me!
July 13, 2006 1:56:51 PM

Quote:
I found a board that should work great if you overclock to 375 mhz 1500mhz quad-pumped . Click me!


Could you write down what board it is? I'm stuck behind web sense at work :cry:  .

So, if I understand this correctly, the idea would be to get 800MHz CAS5 dual channel memory, reducing the clock speed to get the 1:1 divider tighten the timings and overclock from there, correct? So really, I'm purchasing the memory above, but I'll most likely end up reducing the clock?

This whole divider issue is screwing me up :? . Would either of you know of any overclocking articles that deal with dividers? Most of the ones I find don't mess with memory dividers...
July 13, 2006 3:46:22 PM

The board that I told you about isent out yet but it does not even use dividers so you wont have to worry about that. Im not sure if im supposed to post that image becouse of copyright or something but if theres a problem I will remove it. P.S. Does anyone know the exact release date of this chipset. People have said anywhere from the next few days to all the way in january. Im confused.
July 13, 2006 4:15:02 PM

Also I wouldent get DDR2 800mhz with a cas of 5 I think it's a rip off.You can probly get good dimm of much cheaper DDR2 667mhz at a lower cas and overclock it to DDR2 800 with a cas of 5. If you do get DDR2 800 get one with a cas of 4 such as this Patriot eXtreme Performance 1GB DDR2 800 mhz 4-4-4-12
August 22, 2006 3:53:58 AM

ok i here is my advice, i have had e6600, e6700 and e6400, i tried all of them out, the highest overclocks i have had were with the e6400, i have it watercooled, honestly i think they are the best overclocking chips and the best bang for ur buck, i couldnt overclock the e6600 more than 3.2 or the e6700 3.5, it i didnt matter i got the same score in games and 3dmark that i got with 3.2 with my crossfire system. because these chips are just too damn fast for the graphic cards, ok may be a little difference but 3.2 is just too smoking fast to do anything with chips.

this is my system
e6400 at 400x8 at 1.5v the actual 1.465 cuz my mobo is always drops it underload so i had to set it up at 1.5.
mvch voltage at 1.6

having this chip makes me it certain to believe that my mobo always had the juice but the e6600 and e6700 i could never clock them higher than 360.
well i am happy staying budget and having a crazy gamin system. i dont know why i could clock the e6400 at those speeds and not the e6600 and e6700.

i could do 390 at stock voltage but the last 100 mhz reequired a bump in the voltage. i hear everyone saying talk about 2mb/vs./4mb cache. well i agree with the ones that say it doenst matter much, i mean what can we do with 4mb cache what we couldnt do with 2. core 2's are so fast that it eliminates the need of the extra cache. well if u got the money get whatever u wish, i wanted to keep the e6700, but after trying all these chips from the retailer close to me, i decided to keep the e6400 and i love it. i am saving my money for r600 graphics. that will truly benefit us at these fast speeds.