[Update 25/11] 2GB of DDR2 for overclocking what to buy

[zbomb5610]

Well since you're able to get around 500mhz fsb, drop the multi to 2.5 and the Fsb to 401. That'll give you 1000mhz. Use setfsb21a to overclock, make sure you have all your voltages set correctly. When you boot at lower memory speeds, the board will tighten the memory timings. Make sure you have active cooling on both your ram and northbridge. Any FSB over 333mhz really needs a fan over the northbridge. I've got an 80mm over mine, with nothing over the ram usually (1.9V doesn't even warm the heatspreaders.) When I bench, I usually bench in sub-freezing ambient temps...

Of course your pi times are going to go down when you set the FSB lower, you have an e6300 therefor the cpu will be clocked slower. You should be aiming for your max fsb (which is around 490?) with the multi set to 2.5x, which would result is a memory speed about 1180.

I have a HR-05 nb heatsink along with an 80mm fan on it, so i am pretty sure the nb is very cool. And while i was testing the memory, i let a 120mm fan sit over the memory.

My max fsb is 522, so you are saying to boot up at lower fsb and not test the memory through booting up in the bios, but rather use setfsb21a to overclock and test the memory in windows? I might give that a try later on today.

zbomb the P5B is probably setting different sub-timings than the DS3. If you could get a SS of the P5B's memset at 1185mhz you can copy those timings over to the DS3. I'm sure they are much looser.

i will try to do that also.

thanks hutch, ill let you know if i get any more luck.

[zbomb5610]

UPDATE: I tried to use setfsb, but i had better luck just using easy tune (program that is for the ds3). Again, 2.5 multiplier does not work whatsoever when trying to oc the memory, it won't even do 1000+ without having problems and freezing on me.

I changed to multiplier of 3, and i had some more luck.

Problem is that I can only boot at 1140 in bios sometimes, and sometimes I can’t. So I broke the 1080 barrier after tweaking with the subtimings in the bios. But I had a lot more luck with ocing the memory when I tweak with the subtimings in memset and use easy tune to bump up the fsb.

I changed the subtimings to what are shown in the first pic for the hz’s, and those subtimings were pretty much what my cousin’s p5b deluxe are set to. I was able to hit 1170 fsb and run super pi 1m, but I also hit 1190 fsb before the comp froze trying to run super pi. Seems 1170 on the hz’s was the most stable for the ds3 with 2.5v. But I really didn’t do much testing, pretty much trying to figure out if the ds3 is limiting the memory overclock or if it is the memory.



I then ended up testing my cousin’s crucial, which also wouldn’t boot at over 1140 in bios with loose timings. Under easy tune though, with setting the subtimings pretty much to what the hz’s were at, I was able to hit 1260 and get off a round of 1m super pi. I hit 1272 but the comp froze with the crucial at 2.4v, I really didn’t put any more voltage into the crucial since they are my cousin’s and he would probably get butt hurt if he knew I did.



So thanks hutch, I originally didn’t mess with multipliers and subtimings in windows much because I really wanted to get the memory to boot higher from the bios, but that just wasn’t happening. So you getting me to try setfsb made me play with a few other things in windows and I pretty much figured that I could hit higher memory overclocks if I played with them in windows, meaning my ds3 is capable of doing it, just not from bios.