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professional vim user
don't pick on Zwerg01 too much, as he could be at least 90% right. if ED can't deliver on 4GB, there may be more cancellations than would be expected with an optimistic fanbase.
I doubt this would kill the Pyra, since the issue isn't "it's not working period," it's that the design that was good enough for 2 GB isn't robust enough for 4 GB.Well I should hope not. If this kills the Pyra I'm going to be really mad at the people who just couldn't accept that 2GB is enough.
I quite agree. The last messages on the kernel mailing list from Nikolaus sounded like he was quite confident of an improvement in voltage regulation for the new boards. It just slightly annoying that there have been no posts on that front to the mailing list for two weeks now, but I guess these boards can't get made and populated and quality checked overnight.As hard as they are working on getting 2gig/4gig done I'd say it's more a matter of time till they get all the kinks worked out. Might be a big deal if you want it asap, but I think it's still too soon to be worried about not getting a pyra![]()
I don't think there is any chance the 4GB problem will kill the Pyra, might leave a few flesh wounds mind you.Well I should hope not. If this kills the Pyra I'm going to be really mad at the people who just couldn't accept that 2GB is enough.
They need more power, and a higher amperage means a higher voltage drop on a resistor such as the supply line itself. And a lower supply voltage means being closer to the lower voltage limits...On a side note can anyone explain why the stability issue only impacts the 4GB boards, is it simply that tolerances are greater on the ram modules used on the 2GB ram boards? Or is the 'signal' somehow noisier when powering 4GB of ram?
I made much the same point recently myself, and as I said at the time, this could be a blessing in disguise.There is one _very_ important outcome of getting the 4GB boards to work reliably : it will improve system stability for 2GB units as well
Electronic components have tolerances which means their values can swing both ways to a certain amount and electronic components age which alters their values as well and there is heat and other external influences... now imagine the 2GB boards running reliably but just barely so with a thin margin for error, given time these units may become very unpredictably unstable in the future and that would be an absolute mess - no one can tell for sure right now but having a higher margin for those errors is a big plus in my book even on the 2GB units
They need more power, and a higher amperage means a higher voltage drop on a resistor such as the supply line itself. And a lower supply voltage means being closer to the lower voltage limits...
I thought that too for a while, but then I considered that to test these boards they're running some sort of memtest on them, which would I thought have stressed the memory power usage far above what it would doing almost anything else. What I've snipped about parts ageing may be valid still, but if they're all passing at present it would suggest that most of them are well above the line when running memtest at least. Just one row going bad marks RAM as being basically unusable going forward of course, but we're likely looking at intermittent failures here I think when RAM stops working normally. I've lived with intermittent failures for many years on machines I've owned in the past.There is one _very_ important outcome of getting the 4GB boards to work reliably : it will improve system stability for 2GB units as well
High frequency electronics are affected by more than plain static resistance in the same way the coil of an electric motor always has a much larger effective resistance while the motor's spinning. A bypass wire may as well just act as an additional antenna sending noise to nearby lines or turn into a situational resistor by receiving them. Even worse, we're talking about frequencies where the length difference of separate lines that depend on each other matters, a separate wire whose length does not fit to the line it is bypassing may as well cause noise to peak even more due to temporal interference.It is already proofen that this theory is wrong. hns soldered in additional wires to reduce resistance with no effect.
we're talking about frequencies where the length difference of separate lines that depend on each other matters
...doesn't matter much on the noise that may already be present from other components, don't ignore the rest of the sentence. If there's enough time difference on two lines to make one noise peak overlay the other, you already have a problem. These peaks do not have to be directly related to the component they are going to, the RAM is not the only high frequency component and it is not being driven synchronously to those others.The wavelength
They need more power, and a higher amperage means a higher voltage drop on a resistor such as the supply line itself. And a lower supply voltage means being closer to the lower voltage limits...
Not fully true, lower voltage drop can mean better overclockability for the 2GB... Also the 2GB is deemed stable as is, but we won't be sure they won't get some that won't be stable until mass production...This. There is no improvement for the 2GB by fixing the 4GB.
It is like building a bridge that can support a million tons when it can already support 200 tons, and will actually only see 100 tons.