Re: Bought these (retro) hardware today

Posted on 2023-01-17, 16:08

by

by ChrisK

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Two more CRTs for my 'collection'. A 17" Samsung SyncMaster 795DF and a 19" Hyundai ImageQuest Q910. Both have great specs: the 17" with 85kHz, the 19" with 110kHz. And both are relatively small and light compared to other 17"/19" monitors. (The 17" is smaller than a Sony 15" that I have) I still …

---

Re: Bought these (retro) hardware today

Posted on 2023-01-17, 15:58

by

by ChrisK

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Whatever you do, don't try to put it into an Nforce 3 Ultra board and expect to install anything newer than Windows XP. I can't remember the details, but there is some kind of issue with the AGP drivers for that chipset. I believe none were officially released and any workarounds to force AGP to …

---

Re: Bought these (retro) hardware today

Posted on 2023-01-17, 08:38

by

by ChrisK

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

IMG_0332.jpeg Managed to get this for $20. Feeling very lucky. Unfortunately I don't have a CPU/Motherboard powerful enough to take full advantage of it. :) Whatever you do, don't try to put it into an Nforce 3 Ultra board and expect to install anything newer than Windows XP. I can't remember the …

---

Re: Switching regulator module as replacement for hot linear regulators (mainly used on PCI VGA cards)

Posted on 2023-01-16, 10:59

by

by ChrisK

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Very nice job. That looks amazing! :-) I added your project to the vrm projects thread. :-) https://www.vogons.org/viewtopic.php?f=46&t=86611&p=1132549#p1132549 Didn't know there was one. Thanks! :D I have an aversion against switching components, mildly said. I rather prefer calm, less efficient …

---

Re: Bought these (retro) hardware today

Posted on 2023-01-14, 14:42

by

by ChrisK

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'm very curious about this. What part did you use to replace that ridiculously hot regulator? I know several Voodoo cards from this time period have similar issues with heat dissipation and regulators that run at least as hot as the graphics chip itself. So here are some pictures of the card. Riva …

---

Switching regulator module as replacement for hot linear regulators (mainly used on PCI VGA cards)

Posted on 2023-01-14, 14:38

by

by ChrisK

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, shortly I had made a post about a switching regulator module I once made for my PCI Riva TNT card to replace the very hot linear one. You can find it here: https://www.vogons.org/viewtopic.php?p=1131833#p1131833 Main intention was to reduce the cards temperature due to heating by the regulator …

---

Re: Bought these (retro) hardware today

Posted on 2023-01-11, 20:39

by

by ChrisK

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Additionally the PCI versions have a LDO regulator which adds "some" more heat to the game (that small part with the heatsink). I once changed that to a DIY switching regulator leading to a decreased system power consumption of several Watts. This regulator got untouchable hot and I still don't see …

---

Re: Bought these (retro) hardware today

Posted on 2023-01-11, 12:23

by

by ChrisK

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've used a Murata OKL-T6-W5 module on a custom PCB exactly made for my Creative TNT card (basically just the 3pin footprint of the linear regulator and some mounting hole). I didn't know how much current the card would actually need so I used the largest one I could find. I can take some pictures …

---

Re: Bought these (retro) hardware today

Posted on 2023-01-10, 13:30

by

by ChrisK

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Additionally the PCI versions have a LDO regulator which adds "some" more heat to the game (that small part with the heatsink). I once changed that to a DIY switching regulator leading to a decreased system power consumption of several Watts. This regulator got untouchable hot and I still don't see …

---

Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2022-12-02, 08:29

by

by ChrisK

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If think you can reduce the requirement for output current of the LDO to around 1.5A max. That is the highest value I know of for 486 class CPUs. Don't know the spec for the SXL2 atm but highly doubt it beeing much higher. Meaning you could use other LDOs with enough margin in dropout voltage at …

---

Re: Pentium MMX overclock - Does it affect it's lifespan?

Posted on 2022-12-02, 08:09

by

by ChrisK

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You could try setting SW3[4..8]=OFF,ON,OFF,ON,OFF. This should give you the missing/undocumented 3.0V for Vcore. Test this with a multimeter at hand and WITHOUT CPU first since it's a little guess based on the other combinations for Vcore. But it should work. Personally this would be the maximum I …

---

Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2022-11-28, 14:59

by

by ChrisK

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

ChrisK: I have definitely observed a good variance in how hot different linear regulators get under identical load conditions. its pure ohms law, all linear regulators act as resistors radiating required voltage drop in form of heat. Difference between different models is in how precise (accuracy …

---

Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2022-11-27, 19:54

by

by ChrisK

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It is a linear regulator, ultra low drop-out, MIC29302WT. Regulator-Linear_Microchip_3A_LDO_0.4V_MIC29302WT.pdf I selected it because it doesn't get hot at the maximum possible current desired and had the lowest noise of the linear units I tested. All linear regulators dissipate the same power in …

---

Re: Rarest CPUs?

Posted on 2022-11-15, 14:31

by

by ChrisK

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've an AMD-K6-III+/400ATZ 1.6V (that's 9.5W TDP compared to 7.5W TDP of the AMD-K6-2+/350AUZ) running at 6x 83MHz and 1.65V, cooled by a passive Zalman chipset heatsink. It's blown by a low rev 80mm case fan from some distance. Not even getting hand warm. Could surely be run without the fan but …

---

Socket 3 mainboard repair - looking for spare parts

Posted on 2022-11-10, 11:31

by

by ChrisK

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi all, I don't know if this is the right place for asking and if this is allowed at all here @vogons, but I'd like to ask if there's someone around who could offer some of these parts for some board repairs. I'm looking for these chips (in known-good condition ofc): Via VT82C483 Via VT82C505 UMC …

---

Re: I got an ASUS K7M 1.04 motherboard recently. Encountering issues

Posted on 2022-11-04, 09:33

by

by ChrisK

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

OK, now I've read the complete thread. Apparently you haven't done a reflash of the BIOS chip yet. I RECOMMEND YOU DOING THIS FIRST BEFORE YOU DO ANY SOLDERING ON THE BOARD!!! I could still be wrong but I'm VERY confident this will solve your issue. The behavior you describe is just what I have …

---

Re: I got an ASUS K7M 1.04 motherboard recently. Encountering issues

Posted on 2022-11-04, 06:59

by

by ChrisK

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, I only have read the very first post of this thread, so I don't know what you've all tried so far. Just one thing that instantly came to my mind: I also bought a K7M some time ago and it had the very same symptoms! 8 Beeps with VGA card installed, and some other beeps without a VGA card. Fans …

---

Re: Bought these (retro) hardware today

Posted on 2022-11-03, 07:03

by

by ChrisK

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Uhhhhhh, an original Quake package! Thought I'm the only one around with a retail box. But at least my box is in better shape :P Actually I bought this one because my other box is missing the CD and manual but is in better shape than this :) Quake is not really rare or crazy-expensive. I'm sure …

---

Re: Bought these (retro) hardware today

Posted on 2022-11-02, 17:21

by

by ChrisK

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Uhhhhhh, an original Quake package! Thought I'm the only one around with a retail box. But at least my box is in better shape 😜

---

Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2022-11-02, 07:58

by

by ChrisK

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

6-layer costs: what if you split the pcb in let's say a four layer and a two layer part, and lay it on top of the other before soldering? Not very elegant and not sure if the routing and the vias in the current design will allow such crazy stuff but should be doable as long as the combined height …

---