I am about to buy a e6400 next week with the Asus 650i mobo.
I am however unsure of which ram to buy. I am looking at doing a fair bit of overclocking and don't want the ram to be a bottle neck in this.
I have been reading up a bit about ram in the past few days but am still a bit unsure of what to go with.
4-4-4-12 ddr800 run it 2.1v - push the voltage higher then push the speed, i.e. 2.2 volts 900mhz
scan these post how to check 4 errors and oc it - as long as the ram is cool/ warm to the touch under heavy load u can push it harder. if its hot, so hot u can hold on to it then u pushed to hard!
Budget pc6400 that can run 1.8v, and has a lifetime warranty, anything above that is money better spent elsewhere. The difference between cas3 -> cas4 -> cas5 is about 1 fps each step in games... you'll never notice
I'm getting the same mobo and processor. But I went with the 667mhz ram instead. No real quest for overclocking. I'll have it monday.
I think both the 680i (your new mobo), and to a larger extent, the RD600 both run their memory asynchronously to the FSB. Which basically means your "slower" memory won't interfere with your OC nearly as much as an Intel chipset - so you can still OC if you want to later on.
I just overclocked my e6600 to 3.06ghz and have 6400c4 800mhz corsair ram ddr2. I changed the ratio FSB:Ram 1:1 and now my latency has gone from 4-4-4-12 to 5-5-5-17 is this ok? Do i need to change the timings back to how they were now that i have made the ratio 1:1? Will it affect my performance?
You are definately right that RAM is the most likely source of bottlenecking when it comes to overclocking. I bought 667mhz RAM, and its keeping my overclock back, so I would reccomend getting 800 or 1000 mhz stuff. Although, my 667 RAM can run at over 980mhz with slack timings, unstably, so I guess it just depends how much overclocking you want to do, and if you're willing to risk smoking some cheap RAM.
You are definately right that RAM is the most likely source of bottlenecking when it comes to overclocking. I bought 667mhz RAM, and its keeping my overclock back
Hey it's simple - you can OC from 266 FSB coreclock to 333, with that memory (a 25% OC).
If you wish to OC past 333 you should use DDR2-800 which will allow 400 FSB coreclock (a 50% OC).
300 or 333 FSB is a nice little OC - but if you want more ( greedy) then yes you shoulda got the faster RAM...
My memory runs 1:1 at less than its rated speed, but gives 3,4,4,10 timings with nice easy 2.0V
But I guess we shoulda got each other's memory then...? LoL
...risk smoking some cheap RAM
Yeesh! no such thing in Canada these days - it's all way expensive, heheh
I have the Asus 650i and an E6400... I use Crucial Ballistix DDR2800 and it works great. It's on the QVL, it's Crucial, and is some of the best you can buy. I manually set the timings when I booted the first time (4-4-4-12 T2) and set the voltage to the 2.25 option in the BIOS (the factory specs rate it at 2.2).
I made a thread at the Anandtech forums when I built it, with pictures of my build. If you want to see them just send me a PM and I'll try and find the link to the thread I made.
Oh yeah, drop the RAM in the black slots when you build your rig, it will give you a bit more breathing room from the NB heatsink.