RE: [Sheflug] Power fluctuations...

["Paul Sims" <nospam [at] lombard.co.uk>]

I have a 32Mb PC66 SDRAM dimm & 2x32Mb FPM SIMMs. Works fine. Don' t believe all they tell you about memory matching.

On Wednesday, June 21, 2000 8:57 AM, Craig Andrews [SMTP:craig [at] fishbot.free-online.co.uk] wrote:
> I did wonder about the general wear and tear of my now decprepit PSU. I also
> wondered about heat. However, although the problems with the gfx occur after
> about 10 mins (at which point the gfx chip is too hot to touch), the mouse
> probs occur from boot, whenever a lot of hdd activity is going on.
> 
> I will probably get a new PSU anyhow, and see how it's going on. I also
> never run the system with its case on (ovetheating ;-) so I will probably
> invest in a case fan.
> 
> As will thinks, it could well be my RAM? I have 2 70ns EDO 32Mb SIMMS and 1
> 60ns EDO 32Mb DIMM. Officially, this doesn't work ;-)
> 
> I may end up buying a 128Mb Dimm anyhow.
> 
> I have noticed that my Storm Linux box (k6-2/500, 64Mb PC100, 1.5Gb HDD) is
> significantly more responsive than the box I am having trouble with! Odd,
> considering the spec difference.
> 
> We shall, as they say, see.
> 
> Craig
> 
> -----Original Message-----
> From: Alex Hudson <eah106 [at] york.ac.uk>
> To: Sheflug <sheflug [at] vuw.ac.nz>
> Date: Tuesday, June 20, 2000 11:48 PM
> Subject: Re: [Sheflug] Power fluctuations...
> 
> 
> >
> >Hi Craig.
> >
> >Hmm. I would imagine that 200W should be enough, you're not running vast
> >amounts of gear of it. Generally, power supplies either work or they don't
> >- if there's too much load, or not enough load, they generally don't start
> >up. I'm pretty sure you'd know about it, anyway! One thing to try is to
> >put an RCD in circuit somewhere, see how much juice it's drawing.
> >
> >I would lay more money on it being heat related, to be honest. 3 hard
> >drives - they're bound to warm up, as is the gfx card. If you put your
> >hand near the fan on the psu, how warm is the air coming out? It should be
> >toasty (after leaving the machine running for a while), but not hot (this
> >is kinda hard to do, given the human body is completely unable to measure
> >temperature to any degree whatsoever ;). Anyway, random graphics / etc.
> >occurances are often due to heat: either the CPU getting a bit roasty and
> >getting a few bits wrong while it mops its brow, or the GPU doing the
> >same. Or both ;). Of course, it depends when these occur - if they occur
> >right from turn-on, it's not heat.
> >
> >One other thing it could be, that's PSU-related but not power related, is
> >the spec of the PSU. It could be that the tolerance has moved sufficiently
> >such that the logic rails on the motherboard are a bit closer. This would
> >lead to random data rubbish also. Or, possibly some dried-up caps: the
> >smoothing on the power supply is essential: when large loads are applied,
> >the caps are there to just bump the voltages back up again. If the caps
> >are dry, they won't be smoothing and you'll be seeing the effects of
> >fluctuating power.
> >
> >So, three reasons: two relate to a bad PSU, one to heat. If you measure
> >the heat of the system, and it's okay (or you get errors all the time),
> >it's probably the PSU.
> >
> >Cheers,
> >
> >Alex.
> >
> >On Tue, 20 Jun 2000, Craig Andrews wrote:
> >
> >> Hi all,
> >>
> >> I have been suffering for a while with a rather annoying problem. Well,
> >> two actually.
> >>
> >> First, whenever the hard drive gets a good thrashing (any drive, in fact,
> >> out of 3) the mouse cursor takes on a life of it's own. It can be
> annoying
> >> in Gimp to have a screen-long line just because of a flushed buffer! I
> >> think this is (partly) to do with either a) the PS/2 interface, or b) the
> >> IMPS/2 driver. Note that ALL IMPS/2 mice do the same thing. Not tried any
> >> other protocols.
> >>
> >> Second, my RivaTNT2 seems to lock up whenever it has a lot to think
> >> about. Particularly involving alpha blending and the like. I thought that
> >> this was to do with the alpha glx driver I have, but the release Windoze
> >> driver does it too. It doesn't do it straight away, mind. It waits. In
> >> Tux- A quest for herring, it only locks when I press Space for the menu,
> >> and the transparent text appears. In NFS4 in Windows, it seems to be when
> >> water or lens flare is present.
> >>
> >> What I put both these down to is a lack of power. In my machine, I have:
> >>
> >> K6-2/500 w/ 96Mb EDO Ram
> >> NVidia RivaTNT2 32Mb AGP 2x
> >> SB Awe 64
> >> Modem (internal)
> >> CD-Rom and Floppy
> >> 15, 8.4 and 3.2 Gb Hard disk drives
> >> Genius optical mouse (IMPS/2 driver)
> >> 200W (old, cheap) PSU
> >>
> >> What does anyone reckon to my theory, before I splash out on a more
> >> powerful PSU? (The old one cost 16 quid, with a case!)
> >>
> >> Craig Andrews
> >> craig [at] fishbot.free-online.co.uk
> >>
> >> - - - - - - - - - - - - - - - - - -
> >> Life would be so much easier if we
> >> could just look at the source code.
> >> - - - - - - - - - - - - - - - - - -
> >>
> >> ---------------------------------------------------------------------
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> >>
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> >>
> >>
> >>
> >
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> >
> 
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