"PJL" said:
I have a Shuttle SB51G which has been running a Radeon 9200 (128 MB) fine.
Wanted
to upgrade the video card. Bought an eVGA GeForce FX5500 (256 MB). Plugged
it in. Pushed the switch--nothing. Machine was dead. Nothing. Took out
the new, put back the old video card, fired right up. Checked it again,
made sure card seated, etc. Tried to start it again. Nothing. Dead
computer. Tried the card in another machine. Works fine. What gives?
Could this be a power supply issue? I have read on this newsgroup about
folks using this exact card in this exact machine. Frustrated.
Just increased RAM from 520MB to 2GB at the same time--could this be part of
the problem? New RAM seems
to be working fine.
If I can not use this card in this machine, anyone have any suggestions for
an upgrade on the Radeon that WILL work?
Thanks in advance.
In this thread, someone gets a FX5500 to work in a SB51G.
At least that says the interface is compatible.
http://groups.google.ca/group/alt.c..._frm/thread/249b9c65353a4282/dcd4aa14e26a24e1
This site predicts sompatibility as well:
http://www.playtool.com/pages/agpcompat/agp.html
The power consumption of the 9200 and the FX5500 isn't that
much different. It really depends which rail the juice is
being drawn from, and details for the majority of cards
are not available. (Xbitlabs has a few results, but not for
FX5500.)
http://www.jscustompcs.com/power_supply/
There is a picture of the Achme 200W supply here. I believe
this is the stock supply for your computer. Look on the label
on the supply, and see if the characteristics differ.
3.3V@10A 5V@20A 12V@10A
[email protected]
http://www.vr-zone.com/?i=72&s=3
In terms of the 12V supply, the max power draw from the processor
would be with a 3.06Ghz/FSB533/512KB cache processor. 82W is
the TDP for this one. (82W/12V)/90% = 7.59A of the 10A available
on your supply. A lesser processor will be a bit easier on power.
http://processorfinder.intel.com/scripts/details.asp?sSpec=SL6QC
Shuttle has power supply upgrades. The PC40 is a single 12V
output supply, while the PC50 is a dual 12V supply (ATX 2.0+
supply spec).
http://tw.shuttle.com/share/fae/hq/faq/others/qa/Accessory Summary.htm
PC40 (250W) = 3.3V@18A 5V@19A 12V@16A 5VSB@2A
http://www.zipzoomfly.com/jsp/ProductDetail.jsp?ProductCode=150998&ovsubmit=shuttle+250W+PC40
PC50 (300W)
http://www.zipzoomfly.com/jsp/ProductDetail.jsp?ProductCode=151000
There is a picture of the PC50 here:
[email protected] 5V@19A 12V1@8A
[email protected] 5VSB@2A
http://www.sfftech.com/showdocs.cfm?aid=695
The PC50 would run the CPU from the 12V2 output (I assume 12VB
is 12V2 and 12VA is 12V1). The 8A would run the rest of the loads,
like disks and fans. The PC40, with its single 16A supply, would
give max 7.6A to the processor, leaving 8.4A for peripherals. That
makes the PC40 a better deal than the PC50.
The PC40 has 3.3V@18A, and I suspect that is what might help
you. This is just a guess, as the power difference between the
9200 and FX5500 is so small, as to make it unlikely to be a
power problem. But, because you've already applied all the
appropriate card swapping tests, and the FX5500 passed, it
isn't likely to be a duff FX5500 (which would have been my
first guess).
One way to test for power issues, might be to "unload" the
Shuttle box a bit at a time, and see if it comes to life.
The RAM will likely run from a linear regulator from 3.3V,
so strip the box to one stick of RAM. Disconnect the IDE
cable used by the drives, and disconnect the power from the
drives, and see if the box starts with the FX5500 in place
(but no drive data or power connected). If you can see the
BIOS at this point, then I'd head off and pick up a PC40.
A natural question would be, "why buy a 250W supply when a
300W supply is available" ? The answer is, does it put the
power where it is needed. The 250W has a superior 3.3V output,
and based on the max CPU loading I can think of, I suspect
the 250W also has superior +12V. And the total power for the
box will not be 250W - you will only be using a portion of
that in total.
Report back how it goes. The fun with SFFs, is getting them
to run within a limited power envelope. You might want to
do a bit more reading on the PC40 and PC50, and see if they
introduce more noise to the system.
Paul