Re: Dual CPU Socket 5/7 Boards

Posted on 2022-03-25, 08:57

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Something about this just won’t die for me, I gotta keep perusing this until someone tries this in all the socket 5 boards. So I’m looking for owners of dual socket 5 motherboards to try something for me. (And for science) The story starts here.. https://arstechnica.com/civis/viewtopic.php?f=8&t= …

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Re: What retro activity did you get up to today?

Posted on 2022-03-25, 08:44

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yesterday I played Sims on SIMMs

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Re: Solder more SDRAM to motherboard

Posted on 2022-03-25, 08:16

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

https://www.vogons.org/viewtopic.php?p=1054683#p1054683 Looks like you have some onboard ram. Which you may actually consider desoldering and putting all your ram in the provided slot. Because you should be able to get 128mb in the slot alone and with better chips. Otherwise you’ll be limited to …

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Re: SUCCESSFUL K6-2+ to K6-3+ Full Cache Enable Mod

Posted on 2022-03-25, 08:03

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

bloodem wrote on 2022-03-25, 07:46: Sphere478 wrote on 2022-03-25, 07:38: Sweet! Lookin forward to what you figure out :p thanks! @Sphere478, I have to say, you'd make a good project manager! 🤣 Thx 😀

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Re: SUCCESSFUL K6-2+ to K6-3+ Full Cache Enable Mod

Posted on 2022-03-25, 07:38

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'll test it properly next week. I can make a draft today with another printer to see is there hope. If it fits I'll post the file. I can post one (not the draft) to you also, lets see. Fitting must be quite accurate and design may need some tuning. Added some estimate of shrinking and print …

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Re: SUCCESSFUL K6-2+ to K6-3+ Full Cache Enable Mod

Posted on 2022-03-25, 07:02

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Ooo sweet!!! Anyone with a printer able to send me one? I’ve been doing a bunch of these. And could use it! If you are sure it fits, post the file and I’ll add it to the guide. I'll test it properly next week. I can make a draft today with another printer to see is there hope. If it fits I'll post …

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Re: Possible to run K6-3 with vcore of 2.8v?

Posted on 2022-03-25, 04:00

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you so much for your advice everyone! I just got my MMX 233 today and added it. I get ~15 more FPS out of Quake which is pretty fantastic! I am pretty intimidated at the idea of modifying the motherboard. I have never done any soldering before. I am going to do some research and see what I am …

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Re: Repair shops hate me. I fixed defective memory on my video card with this one neat trick.

Posted on 2022-03-25, 03:58

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Should further stabilize Ripple. 🤔

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Re: SUCCESSFUL K6-2+ to K6-3+ Full Cache Enable Mod

Posted on 2022-03-25, 00:45

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

We need a 3d printed alignment tool for reinstalling the ihs squarely anyone able to make one? Something really basic like this one? CPU on flat surface and set this on top of it. Height is a few tenths less than CPU so you can add some weight on it. I haven't printed this yet but on next week I …

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Re: Repair shops hate me. I fixed defective memory on my video card with this one neat trick.

Posted on 2022-03-25, 00:43

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Where I had to downclock the memory to 290 Mhz before, it's now stable overclocked to 400 Mhz. That's quite an improvement. This card seems to benefit the most from additional memory bandwidth. Increasing the core clock doesn't do much at all. Add more caps in parallel on the back, see if it goes …

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Re: Early P5 + P54C (Socket 4 + Socket 5) mainboard

Posted on 2022-03-24, 11:43

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You don’t happen to have a powerleap do you? A powerleap bypasses all but I/O voltage If you do have one, you could put a k6-3+ in it lol It should be possible, you could get ahold of Jan and he can probably update the bios to support all the newer cpus. http://www.vogons.org/viewtopic.php?t=84642 …

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Re: SUCCESSFUL K6-2+ to K6-3+ Full Cache Enable Mod

Posted on 2022-03-24, 08:47

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

crazytiti wrote on 2022-03-24, 07:51: Maybe there's a way to know from the source. Does anyone know someone who work at AMD at that time ? Any chance the patent could tell us? How do we look that up?

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Re: SUCCESSFUL K6-2+ to K6-3+ Full Cache Enable Mod

Posted on 2022-03-24, 03:32

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Got that higher conductance adhesive. Actually the second time I ordered it. First time seller only sent one tube (it’s an epoxy) second time I got both tubes but the stuff is dry and doesn’t react or stick to anything. Seems to be bad. The polyurethane I tried earlier I didn’t clean up and let cure …

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Re: Early P5 + P54C (Socket 4 + Socket 5) mainboard

Posted on 2022-03-24, 01:43

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Most of these early Pentium boards use a circuit with an LDO voltage regulator alongside a transistor like TIP127 to boost the output current. I have a Soyo Socket 5 board that supports only P90/P100 and yet it uses quite a beefy heatsink for the transistor (it still gets quite hot): TIP127.jpg You …

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Re: Repair shops hate me. I fixed defective memory on my video card with this one neat trick.

Posted on 2022-03-24, 01:29

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Kahenraz wrote on 2022-03-24, 00:51: The BIOS chip is soldered and it's not worth the effort to remove and reattach it, with or without a socket. Lol you do it through software haha (on the computer that has the card installed) I think gpu-z can dump the bios and nbitor may be able to read the …

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Re: Repair shops hate me. I fixed defective memory on my video card with this one neat trick.

Posted on 2022-03-24, 00:44

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

see if it maybe needs new capacitors sometimes line noise can cause errors You called it! 😄👍 w00t! what did I win? I love it when we figure out a hardware mystery! good job!!! I see. Maybe PNY modified the latencies then? Here is a picture from the datasheet for this chip. Screenshot_20220323- …

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Re: Socket 7 motherboard condition? Totem TM-586 TX4

Posted on 2022-03-24, 00:33

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

OK so I took the cpu off and its 266MMX 2.8V standard Is it rare? Can I run it in 3.38v then? That's a regular 233MHz Pentium MMX. It is supposed to be run at 2.8V. Change the J8 to J15, set the voltage jumper to 2.8V and see if that fixes your stability problems.😃 It's not particularly rare or …

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Re: Early P5 + P54C (Socket 4 + Socket 5) mainboard

Posted on 2022-03-24, 00:29

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Interesting idea, so simple as hooking them up in parallel to let them share the load with the same switching speed 🤔 I will definitely order a few TIP127 to have as spares as a start. Who knows when the original one fails... It should be able to cope with 5A continuously with adequate cooling, …

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Re: Socket 7 motherboard condition? Totem TM-586 TX4

Posted on 2022-03-23, 14:16

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

No prob, :-) Thank you for your private message Sphere478, but I can't reply there yet since I'm new and don't have the option. I hope the 266 is fine as it was never overheated, and the same problem occurred on my 133. This problem did not happen before I replaced the 2 capacitors. but it worked …

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Re: Early P5 + P54C (Socket 4 + Socket 5) mainboard

Posted on 2022-03-23, 14:14

by

by Sphere478

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Interesting idea, so simple as hooking them up in parallel to let them share the load with the same switching speed 🤔 I will definitely order a few TIP127 to have as spares as a start. Who knows when the original one fails... It should be able to cope with 5A continuously with adequate cooling, …

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