nhattu1986 wrote on 2026-11-02, 16:57:

you should check their cap! I also accquire two of them and both having bad caps

Here's my initial list of replacement caps: (I still need to clear the ambers)

Irinikus wrote on 2026-11-02, 19:45:

Here's my initial list of replacement caps: (I still need to clear the ambers)
<snip>

I recommend the following:

For the 50V 1uF caps, do not use Wurth Elektronik. Wurth refuses to disclose who makes their parts, so assume they are inferior.

Don't use Panasonic FC.

For the 1000uF parts, don't use Panasonic EB. For the small caps, EB is ok.

For the 4700uF caps, do not use Nichicon VY.

This is what I've settled on, as these components are available locally:

There are different versions of this power supply, so I'm going to have to wait until I can examine its internals before going ahead with the purchase of the capacitors. (I'm currently not sure if this list is compatible with this particular unit.)

Irinikus wrote on 2026-11-02, 13:37:

H3nrik V! wrote on 2026-11-02, 13:21:

Wow, that thing must be huuuuuuuuughely long? Or am I just out of imagination on how it would change the discs without moving them backwards in the enclosure?

It's actually a standard sized drive!

https://www.youtube.com/watch?v=8qKv-Ntwf0s

Thanks for that clarification, it's really cool!

And it reveals that it's actually a slot-in drive - hadn't thought about that, as it looks like a "normal" loading tray 😀

H3nrik V! wrote on 2026-11-03, 08:13:

Thanks for that clarification, it's really cool!

And it reveals that it's actually a slot-in drive - hadn't thought about that, as it looks like a "normal" loading tray 😀

It's Super Cool! 😀 (I also never knew it was actually a slot drive before I saw the video.)

It's an extremely clever layout.

luckybob wrote on 2023-02-15, 17:01:

good luck finding the P65UP5's big brother, the P65UP8.

Bitchin' dual p-pro setup

Its where I keep my overdrives as well. ^.^

I see that you have a PC POWER AND COOLING TURBO COOL 600 WATT POWER SUPPLY in your system.

Did you re cap it?

This morning I decided to take a look at the continuity of the old burned out power connector which I removed from the motherboard, and found the following 5V connections to be open circuits: (I can't imaging why the system was having trouble POSTing!!! 😀 )

Which led to this:

The connector was under-specced for the power that this board draws, why it doesn't have an AUX power connector as well is beyond me! (The additional couplings which I added will help here!)

Here are all of the caps I replaced, I'll test them in due course.

The SCSI drive rack arrived today, so the system disc now has a home. The Nakamichi 5 Disc CD-ROM Mini Changer should hopefully arrive from the UK early next week.

I’ll only refit the motherboard into the chassis once the PC Power & Cooling Turbo-Cool arrives from the US. I also still need to order some adapter cables to neatly wire everything up.

Here's where I am on this build so far, and it's not even up and running yet! (Definitely one of the more expensive builds I've done!)

After having a discussion on DVD's with MPEG-2 Hardware Acceleration in these old machines on the Silicon Graphics User Group Discord, I've decided to drop the IDE Hard Drive Rack in favour of a Pioneer DVR-A03 DVD-R/RW Internal IDE Drive 2x4x24x - Vintage Optical Burner (Which I've managed to purchase as NOS)

And I've also purchased one of these Sigma Designs REALmagic Hollywood Plus PCI MPEG2 DVD Decoder Cards to go with it: (It comes with the pass through cable)

This should add a little more sparkle than the IDE Drive Rack!

The Nakamichi 5 Disc Mini Changer arrived today and I tested it and have loaded it into its drive bay!

It came with this neat 68-pin to 50-pin SCSI adapter! 😀

It’s starting to come together! 😀

The IDE Drive Rack in the top bay is serving as a place holder until the Pioneer DVD Writer arrives.

I’ve juggled the drives around a bit, and I think that this order will give the machine the best look: (I’ve removed the IDE Drive Rack - The Pioneer DVD writer will full this space when it arrives from the US.)

Is the stylized 3.5" bay just for show? Wondering why you went with the combo floppy instead of populating it... or do you have a 3 floppy solution rigged up?

Also 3 optical drives seems a bit odd but ok

maxtherabbit wrote on 2026-11-13, 18:43:

Is the stylized 3.5" bay just for show? Wondering why you went with the combo floppy instead of populating it... or do you have a 3 floppy solution rigged up?

The drive itself no longer works and it’s a particular drive to which the stylised front bezel is attached, so it would be pretty difficult to replace.

The other problem is that there’s limited clearance between it and the secondary CPU on the CPU card, so wiring it up would obstruct airflow to the secondary CPU!

I also can’t remove it, as the front bezel’s attached to it. (Without it being wired up, the airflow to the secondary CPU is good.)

The problem with this Base Board /CPU Card setup is that it always conflicts with the 3.5” drive bay options, no matter what case you choose!

maxtherabbit wrote on 2026-11-13, 18:43:

Also 3 optical drives seems a bit odd but ok

With these three optical drives I cover the following: CD, DVD, Caddy Loader Drive, Slot Loader Drive, Tray Loader Drive, Single Disc Drive and Multi Disc Drive.

Covering all of the bases from that period!

If that’s not interesting to you, then I don’t know?

This machine will have the following IO: CD, DVD, 3.5” Floppy, 5.2” Floppy, USB, Network, two serial ports and one parallel port, so it will be a pretty good all rounder! 😎

Irinikus wrote on 2026-10-29, 12:43:

https://siliconimage.irixnet.org/uploads/2026-10/17932776707839pWoCM84df4_portrait.jpg […]
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^ That's the CWT CSB-A platform.

According to Aris' tests of PSUs using this platform, empirically the OCP (Over Current Protection) on the +5V rail doesn't trigger until up to a ~29A load (~145W).

Example, Corsair CX450M:

However beware that the MSI MAG A650BN, to cut costs down, comes OEM stuffed full of bottom of the barrel, undersized ChengX and Jun Fu crapacitors.

TELVM wrote on Yesterday, 09:05:

^ That's the CWT CSB-A platform. […]
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Irinikus wrote on 2026-10-29, 12:43:

https://siliconimage.irixnet.org/uploads/2026-10/17932776707839pWoCM84df4_portrait.jpg […]
Show full quote

^ That's the CWT CSB-A platform.

According to Aris' tests of PSUs using this platform, empirically the OCP (Over Current Protection) on the +5V rail doesn't trigger until up to a ~29A load (~145W).

Example, Corsair CX450M:

However beware that the MSI MAG A650BN, to cut costs down, comes OEM stuffed full of bottom of the barrel, undersized ChengX and Jun Fu crapacitors.

Thanks for the info! 😀

Running a switch mode at 147.5% of it's rated output for prolonged periods can't be good! (I've ordered in a Turbo-Cool, which I'm still waiting to arrive from the US, which gives me 50A on the 5V rail (250W), which should be plenty for this setup.)

Here's a complete breakdown of what this system's going to be: (This list will remain unchanged provided that the last few components that are still on their way to me arrive intact.)

I haven't as yet factored in the costing for a possible Power Supply Re-Cap. (Re-Capping a brand new Power Supply - Pure madness!)

Irinikus wrote on Yesterday, 10:46:

... (I've ordered in a Turbo-Cool, which I'm still waiting to arrive from the US, which gives me 50A on the 5V rail (250W), which should be plenty for this setup.) ...

^ I remember reviews of those PSUs from over a decade or two ago. Those things were built like tanks, some even sported copper heatsinks! Didn't know they are still in business.

Irinikus wrote on Yesterday, 11:08:

... (Re-Capping a brand new Power Supply - Pure madness!) ...

I've done exactly that several times. In fact the last customer was, of all PSUs, precisely a MAG 650BN. Got it at a bargain price, and once recapped with real jap caps, and after some cooling improvements, makes IMHO a fine ATX power supply for retro PCs.

“Though this be madness, yet there is method in ’t” 😀