pc100 vs pc133 voltage

[Sten]

Can anyone tell me if pc133 DIMMS consume more power then pc100's? I'm
wondering if that is the reason for my computer's instability...
(motherboard is AMD-756 Viper chipset, built for pc100...but if pc133 uses
more electricity, maybe that's what is locking the board? Like using the
motherboard's headers for fans...plus I/O)

 

[kony]

Can anyone tell me if pc133 DIMMS consume more power then pc100's? I'm
wondering if that is the reason for my computer's instability...
(motherboard is AMD-756 Viper chipset, built for pc100...but if pc133 uses
more electricity, maybe that's what is locking the board? Like using the
motherboard's headers for fans...plus I/O)

No, that's not the problem, PC133 will use same amount at same speed and
number of chips, density, etc.

Please don't excessively crosspost.

 

[Peder]

Can anyone tell me if pc133 DIMMS consume more power then pc100's?
I'm wondering if that is the reason for my computer's instability...
(motherboard is AMD-756 Viper chipset, built for pc100...but if pc133
uses more electricity, maybe that's what is locking the board? Like
using the motherboard's headers for fans...plus I/O)

Have a look at the capacitors on the board and see if they are swollen or
leaking. I had several boards that suffered this and created similar
symptoms. Good luck.

 

[Guest]

Can anyone tell me if pc133 DIMMS consume more power then
pc100's?

Look at spec sheets posted at www.micron.com

I'm wondering if that is the reason for my computer's instability...

It's not, because memory modules consume so little power that they
never need heatsinks (Heatsinks on modules are only for decorative
purposes, as opposed to heatsinks on some video memory chips).

What brand memory chips do your modules have?

 

[Sten]

One has Samsung chips, and the other two have a logo which looks like "OC"
It's Kingston Value Ram...

Oddly enough, if I'm only running two modules, in any slots, the crash does
not occur. (I'm testing this now. It's been 30 hours, and all seems well)
If no crashes occur before Monday, I'll test this theory by re-adding a
third pc133 module.

Nick

Look at spec sheets posted at www.micron.com


It's not, because memory modules consume so little power that they
never need heatsinks (Heatsinks on modules are only for decorative
purposes, as opposed to heatsinks on some video memory chips).

What brand memory chips do your modules have?

--

 

[kony]

One has Samsung chips, and the other two have a logo which looks like "OC"
It's Kingston Value Ram...

Oddly enough, if I'm only running two modules, in any slots, the crash does
not occur. (I'm testing this now. It's been 30 hours, and all seems well)
If no crashes occur before Monday, I'll test this theory by re-adding a
third pc133 module.

Nick

It sounds like your problem is the number of memory modules then, and best
attempt at resolution (using same modules) would be going into BIOS and
manually setting slower memory timings (higher numbers).

 

[CBFalconer]

One has Samsung chips, and the other two have a logo which looks
like "OC" It's Kingston Value Ram...

Oddly enough, if I'm only running two modules, in any slots, the
crash does not occur. (I'm testing this now. It's been 30 hours,
and all seems well) If no crashes occur before Monday, I'll test
this theory by re-adding a third pc133 module.

Please do not top-post. I fixed this one.

As you add modules you add capacity to the signal lines, which
lowers rise times and effectively makes the memory slower. So you
need to adjust the memory timing to allow for that. Another
possibility is that there is insufficient local capacity for the
memory chips, which take surges of power during operation. The
local capacity should consist of electrolytics in parallel with
high speed ceramics. The surges are of very short duration, and
need to be supplied by those local capacitors. This has nothing
at all to do with the master power supply.

 

[Guest]

One has Samsung chips, and the other two have a logo which looks
like "OC" It's Kingston Value Ram...

Oddly enough, if I'm only running two modules, in any slots, the
crash does not occur. (I'm testing this now. It's been 30 hours,
and all seems well). If no crashes occur before Monday, I'll test
this theory by re-adding a third pc133 module.

Those "OC" chips are probably "B" quality chips or even used chips
that have had their original markings removed. Real part numbers are
a long series of digits and letters and will almost always return
Google search results, at least if you leave off enough characters
from the end.

Sometimes with a PC100 system it helps to run PC133 modules with
faster than normal timing. In other words if the PC133 module is
rated for CAS3, try it at CAS2 in a PC100 system. You'll have to turn
off the automatic configuration to make this work, sometimes labelled
"SPD" (Serial Presense Detect) instead of a number like 2, 2.5, or 3.