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Compaq Deskpro 590

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First post, by BinaryDemon

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Hi,

I'm always jumping around between a bunch of 'projects' but here is what I've been having fun with lately. I got this Deskpro 590 off ebay for $40. There was very little information, the seller just said 'Partially tested..seems to pass Video and RAM test, CD does not open". I was concerned from some of the pictures that it might have been water damaged, but to my relief it was just 20 years of dust. At some point it seems like someone had done some upgrading because here were the specs:

Pentium 75
40mb ram (72 pin SIMM?)
Onboard QVision 1280P+ w 1mb vram
Soundblaster Awe64 value
Broken 24x CD-Rom (replaced with 48x CDRW, the only beige ide drive I had)
4.6gb Quantum Fireball IDE
Windows 98 (not SE)

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Amazingly the soldered BR2335 battery still holds a charge (Why solder on coin batteries!), I had ordered an external battery just in case. Originally I had planned to use Win95 but the functional Win98 OS was a nice surprise, I think I'll keep it. I plan to replace the HDD with 2x 8gb IDE DOM. I think I'd like to increase the memory but I'm still debating how much is a good idea. I ordered a socket5 overdrive cpu, not sure it's supported or not, looking forward to testing. I ordered the 2mb vram upgrade for the onboard just to be able to run 1024x768 @ 16bit color, although after installing Jedi Knight and experiencing 320x240 software renderer it was eye bleeding bad. Originally I had thought about getting a period correct card that would support minigl and some basic Win98 3d acceleration but everything 3dfx, powervr and rendition based are looking to cost more than I've spent on everything else so far.

Questions:
Any suggestions on a cheap PCI video card that support directx acceleration, is cheap, and wouldn't seem massively out of place on a Pentium75/150/166? I have a Radeon 7000 and Radeon 9250 which could work but they also have more vram than this system has ram.
Any other suggestions?

Reply 1 of 12, by jaZz_KCS

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The Radeon 7000 and Radeon 9250 will most surely either not run at all in this machine, or run like crap (as in worse than period correct hardware even).

Your best (and most fitting) bet is a PCI card from around that time (up to 1997, the beginning of DirectX support and acceleration.... cards like the ViRGE or the ATI 3DRage come to mind). But some of thesecards are not cheap anymore. The ViRGE for example supports up to DirectX3 (arbitrary DirectX acceleration) and would be period correct.

Reply 2 of 12, by BinaryDemon

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I think I really want something at least dx5. Back in the day my comparable system was a Cyrix P200 with a verte rendition 2100 ? , diamond branded card.

Edit: Rage XL cards seem like they might fit the bill.

Reply 3 of 12, by 386_junkie

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Nice system!

For ISA bus, you'll struggle to beat the onboard Compaq Qvision... that was only ever released on a daughter card for 32-bit EISA bus, not 16-bit ISA.

PCI is beyond me... though I did hear someone mention 3Dfx is good... though could be just a rumour.

Compaq Systempro; EISA Dual 386 ¦ Compaq Junkiepro; EISA Dual 386 ¦ ALR Powerpro; EISA Dual 386

EISA Graphic Cards ¦ EISA Graphic Card Benchmarks

Reply 4 of 12, by BinaryDemon

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Well I wasn’t really considering anything ISA based, but thanks for the input.

Reply 5 of 12, by D3FEKT

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Nice little system.

As someone mentioned already ATI Rage XL, Can pickup 8mb generic branded ones brand new still from China ebay or even amazon cheap.
I have a couple machines that run it and is not a bad card really, supports Direct X 6.0 which i don't think this machine will be running much that utilizes that anyway.

Reply 6 of 12, by Aui

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Hi there - I have found a very similar system but I struggle to enter the BIOS. Battery on my system was dead, but there is an option to jumper and add an external one. While it now correctly recognizes the Disk drive and HDD, it constantly brings up an error - time and date not set. Supposedly there should be a diagnostics disk which helps to configure these systems. Do you know which software I need and where to find ?

Thanks

Reply 7 of 12, by eisapc

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The BR type is a rechargeble batterie, so there is no reason to replace it. It will recharge even after a few hours of power on even if you get wrong date/time at startup.

The nvidia 128 like the Viper 330 is a good choice graphics for my opinion.
Got one in my P133 when it was just released.

Reply 8 of 12, by Aui

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Yes, thanks. But the error message at startup is anoying, so I would like to fix that. I am also not sure if there is a proper bios on that pc or weather its on the hdd (pressing F10 or Esc at startup does bothing). I formated the hdd but there is an additional smal logical partition that I cant delete

Reply 10 of 12, by NeilKnows

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BinaryDemon wrote on 2019-03-23, 15:22:

Pentium 75

Surely this should have a Pentium 90 MHz in it? I assume this because of the model number... You might bactually have a P90 and can increase the bus from 50 to 60MHz?

Reply 11 of 12, by BinaryDemon

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Aui wrote on 2025-12-10, 06:45:

Hi there - I have found a very similar system but I struggle to enter the BIOS. Battery on my system was dead, but there is an option to jumper and add an external one. While it now correctly recognizes the Disk drive and HDD, it constantly brings up an error - time and date not set. Supposedly there should be a diagnostics disk which helps to configure these systems. Do you know which software I need and where to find ?
Thanks

This PC is currently buried in a backroom, not really accessible to me at the moment. Sorry can't help.

Reply 12 of 12, by BinaryDemon

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NeilKnows wrote on 2025-12-11, 19:33:
BinaryDemon wrote on 2019-03-23, 15:22:

Pentium 75

Surely this should have a Pentium 90 MHz in it? I assume this because of the model number... You might bactually have a P90 and can increase the bus from 50 to 60MHz?

Interesting, I did upgrade it at one point with an overdrive chip to 150mhz but I'm fairly sure the original chip was a Pentium 75. Maybe the owner prior to me downgraded it.