FS: SX164 / PC164SX MB with 21164PC 533 MHz CPU and heatsink

FS: SX164 / PC164SX MB with 21164PC 533 MHz CPU and heatsink

Post by Horst Reit » Mon, 01 Sep 2003 03:07:33


Hi,

I'm selling my SX164 (PC164SX) Alpha motherboard including a 533 MHz 21164PC
CPU and matching heatsink via ebay, starting at $1 (no reserve). If you are
interested, please see

http://www.yqcomputer.com/

for more information and photos of the equipment.

Cheers,

Horst Reiterer
 
 
 

FS: SX164 / PC164SX MB with 21164PC 533 MHz CPU and heatsink

Post by mru » Mon, 01 Sep 2003 05:48:28

"Horst Reiterer" < XXXX@XXXXX.COM > writes:


A few notes:

You at least one PAIR of memory modules.

Finding an appropriate fan can be difficult. The fan should be 50 mm
diameter, and the RPM sensor isn't compatible with most fans for sale
in computer shops. I needed to replace my CPU fan a while back. I
ended up using an 80 mm fan with a homemade adaptor and a homemade
converter for the RPM sensor. The problem with the sensor is that
most fans have a high impedance output that with peak-to-peak voltage
of about 4 volts with no load. The SX164 requires a low-impedance
output at 10 V.

--
Ms Rullgd
XXXX@XXXXX.COM

 
 
 

FS: SX164 / PC164SX MB with 21164PC 533 MHz CPU and heatsink

Post by Horst Reit » Tue, 02 Sep 2003 11:43:21

Hi,



You're right, the description is misleading here. Additionally, considering
that the SX164 can be quite picky about the memory modules used, it might be
better to include two compatible DIMMs so that this can't be an issue
anymore.


Again, you're raising a valid point. I didn't include the original fan
because its lifetime is over. Both, the SX and LX do not work out of the box
with commodity fans targeted at x86 systems, besides the eventual RPM sensor
signal incompatibility, the boards expect a non-standard pin assignment
(which can be overcome quite easily though).

Thanks for your comments, I will most likely cancel the auction and relist
the hardware with a compatible memory module pair, fan and SCSI controller
(compatible with Tru64 UNIX) as well as a screen shot recording the system's
working state.

Cheers,

Horst