Conroe and DDR2 for dummies?

BoboKatt

Senior member
Nov 18, 2004
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Hey all,
Coming from an AMD X2 background I am lost here with these new Core 2 CPUs and Mobos and DDR2 RAM. As long as I've had my X2 3800+ and X2 4800+, total and final MHz speed was king. I could OC the AMD Cpus easy like my X2-3800 to 10 X 250Mhz. My RAM could never handle the 1:1 speed since it craps out at something slight over 200Mhz. Again that was never an issue as all I had to do was apply a divider and there... CPU at 250 and RAM at 200Mhz and it all ran great.

Now for these Core2, I cannot understand when folks say they cannot OC them well since their DDR2 RAM cannot handle the final FSB speed. Can we NOT just apply a divider to the RAM on these new mobos? In fact if the CPU by default runs at what... 266 FSB (which is DDR2-533) can you not just fix the RAM to remain at its rated speed and still pump up the FSB of these Core2 to insane speeds like 400Mhz or more?

Also folks talk about if you have cheaper non oc'able DDR2, you have to get the more expensive Core2 like the e6600 or e6700 as those have a higher multiplier stock. Why again do I need to do that if I can simply apply more of a divider on the RAM? I am trying to understand as a total Intel noob why I would have to spend freaking $400-$500 Canadian on top of the line DDR2 RAM(which honestly is more than what my CPU and mobo will cost if I get a e6300) if I plan to OC like mad... if I all I need to do is just keep the RAM at its stock speed.

What am I missing? Is it that the performance loss on these Core2 is insane if you don't set the RAM at a 1:1 ratio or is simply that there are not many RAM divider options on boards so you are screwed and you cannot raise the FSB much? I am sorry if these questions sound stupid but I am just confused. I cannot imagine spending $500 on RAM to ensure that say a $180 e6300 can be oc?ed. What is the point? Heck get the e6600 or e6700 and the cheapest RAM money can buy and still OC. Is this a viable option or again what am I missing?
thanks
 

myocardia

Diamond Member
Jun 21, 2003
9,291
30
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What you're missing is that the RAM can't be run any slower than 1:1 on any of the 965P motherboards. That means that if your RAM is DDR533, you won't be overclocking very far. And even if you buy DDR800, you won't be getting that much of an overclock, unless the RAM itself overclocks considerably, since 7x400=2.8 Ghz.
 

BoboKatt

Senior member
Nov 18, 2004
529
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Jebus!!! OK finally it sinks in and thank you. So if I were to get the much recommended Gigabyte DS3 which does use the 965 chipset, I would be forced to buy RAM that can do say 900mhz (450X2) if I plan on ocing the cpu to 450mhz FSB (that is IF the CPU goes that high). Gotcha! Wow thanks.

On the other hand if I were to pay more for the board and get say an Intel 975 chipset board, then those do allow to run the RAM at other settings OTHER than 1:1, correct? Would this then not be a more cost effective way to go, assuming that the price of ?cheaper? DDR2 RAM is actually considerably less than expensive DDR2 RAM which I am no longer sure it is. Seem the prices have jacked up everywhere for everything sigh.

I've read countless reviews and never had anyone actually come out and say... you are forced to run 1;1 with Intel 965 boards... or I missed it LOL. Thanks again.
 

Dethfrumbelo

Golden Member
Nov 16, 2004
1,499
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Hmm, seems like running async causes a small hit in every case, it's just that running the RAM faster than the FSB offsets it with the added speed.

Still, when gaming at decent resolutions (at least 1280x1024 with 4XAA/16XAF), the GPU is the bottleneck.

I hope DDR2 prices fall after Xmas... overspending on RAM is painful.