I have recommended 1024mb sticks of Crucial Value to many people lately (not here), with the assumption that it will overclock well, and go down to tight timings at stock speeds, but without really knowing for sure. This uncertaincy bothered me, so I ended up ordering a stick of the stuff from newegg on thursday (6-16-05), and it got here on the next tuesday (yesterday now)
here's a nice pretty picture, showing the high density -5B D chips:
I have been somewhat busy since then, but despite this, the ram has been pushed to it's limits when I had the time. Before I start off with the screens, I'll say some things that I have found.
1. Voltage.. doesn't do anywhere near as much as I was expecting.. not until I get to the upper mhz at least. In some cases (2.5-2-2), 2.6-2.7v was optimal
2. Timings. I was expecting better overclocking at tight timings than what I got. The fact that it actually does do tight timings is awesome, but some more headroom would make me feel better
3. Mhz scaling. Considering the oc'ing results of the other 'good' 1gb sticks (exluding ballistix, which is basically the top bin of the chips that go into the value ram), this stuff impresses me. That said, it's nowhere near as good as a 512mb stick would be, mostly in regards to the timings needed.
Now, for the things that I managed to pull off with the stuff being memtest stable so far (or very very close to it. any errors = bad, and i go back to retweak)
Tightest timings possible without going under 200mhz: 2.5-2-2
This.. was easy to do, but hard to find the top end, as Vdimm and various secondary timings were fiddled with for a long time trying to eek out those last 3mhz :p
Next, trying to find the next lowest set of timings that would yeild the biggest mhz increase. This turned out to be increasing Trcd to 3 for 2.5-3-2. This yeilded a decent increase in clocks over 203mhz
After this, a bit of tweaking was done. 2.5-3-3 only got me to 224mhz, and 3-3-2 was the same, so 3-3-3 it is! Note that one of the secondary timings was relaxed a bit to accomodate the speed. I'm kinda surprised that nothing else really needed tweaking aside from the two latency settins (max async and read preamble)
and now! something to make all you high voltage fans happy :p
voltage does NOTHING! I went from 251mhz at 2.8v to 257mhz at 3.1v.. just 6mhz?!
and for the higher timings/mhz crowd.. again, nothing! i think this is partially my mobo's fault though, being weird with ram, but i couldn't get any higher at 3-4-4 than 3-3-3
to all you that go to [H] too, sorry for the direct copy
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