Re: Using AT case turbo switch to change the front side bus speed on motherboard

Posted on Yesterday, 11:06

by

by frudi

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You say you need to switch two jumpers, yet settings for 66 and 100 differ only in one jumper setting. So I'm assuming you're running 112 MHz FSB? In that case, if you can't find a solution for two jumpers, you could still at least make it switch to 75 MHz FSB, since that only differs from 112 in …

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Re: What parts of my SS7 PC should I upgrade first?

Posted on 2021-02-14, 11:59

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by frudi

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If you can get a cheap K6-2+ for $30 or less, that's the simplest way to go. Then if it's not already a 550 MHz model, overclock it to 550 or 600+ MHz, depending on what maximum FSB settings your motherboard supports (since it's an OEM board, I doubt it goes above 100 MHz, but who knows, maybe …

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Re: Geforce 2 MX vs MX200 vs MX400

Posted on 2021-02-14, 11:38

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by frudi

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Overclocked GeForce 2 MX 128-bit is very close to GeForce 2 GTS though. And arguably, you can push 1600x1200 in 16-bit color. And an overclocked Geforce 2 GTS will again eat it for breakfast. Doesn't make much sense to compare one card overclocked to the extreme to another running at stock. Besides …

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Re: Geforce 2 MX vs MX200 vs MX400

Posted on 2021-02-13, 21:22

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by frudi

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The MX was always a value card, even when it first launched, and the slightly higher clocked MX 400 model didn't change that in any way. Lots of people used to praise it back then and it wasn't bad value compared to the pricey GTS/Pro/Ti/Ultra models, especially if you were willing to stick to 16- …

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Re: Are modern PSU’s good for Retro PC Builds? And what PSU do you recommend for Socket 370 and before?

Posted on 2021-02-13, 18:03

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by frudi

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I think all TX-M models from 650 W and up have the same specifications for the 5 and 3.3 V rails, so go for whichever model you can get for cheapest. Just skip the 550 W and lower models, since those supply only 20 A @ 5 V. Also try searching this forum for older threads; I remember the topic coming …

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Re: Recommendation for Modern Power Supplies:

Posted on 2021-02-13, 17:39

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by frudi

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You can get SATA to molex converters, molex to floppy converters and 24-to-20 pin ATX converters for a couple $ each off ebay. A new PSU with these legacy connectors is likely going to be either an old design, made by some questionable/unknown brand or overpriced, or even a combination of all those. …

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Re: Are modern PSU’s good for Retro PC Builds? And what PSU do you recommend for Socket 370 and before?

Posted on 2021-02-13, 17:24

by

by frudi

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

EVGA's website says the 450 BT can do 18 A on the 5 V rail, with a combined max output of 90 W on 3.3 V and 5 V rails together. With just the pair of 1.4 GHz Tualatins pulling over 60 W at max load by themselves, then adding the consumption of RAM, video cards, sound cards and motherboard components …

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Re: Voodoo 1 vs Voodoo 2 in a Pentium 200 (non mmx), worth it?

Posted on 2021-02-11, 12:21

by

by frudi

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If you only have a single system or have additional Voodoo 2 cards to spare, and you aren't primarily interested in running DOS glide games, then by all means, use the Voodoo 2 in your P200 system. It will be bottlenecked by the CPU, but it will still perform better than a Voodoo 1. But since it …

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Re: Non working Abit BE6-II

Posted on 2021-02-05, 10:39

by

by frudi

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Excellent, I'm glad to read it worked out 😀

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Re: Help with CPU and jumper settings.

Posted on 2021-02-05, 09:16

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by frudi

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The silkscreened fractions are just the inverse of multipliers. I guess it's meant as the fraction of CPU frequency the external bus runs at. I've seen quite a few socket 7 boards use this notation. Just reverse the listed fractions to get the more familiar multipliers (1/2 -> 2/1 = 2x, 2/5 => …

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Re: Non working Abit BE6-II

Posted on 2021-02-05, 08:58

by

by frudi

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I don't remember if I've ever tried programming a chip with an image bigger than the chip, so I don't know if the programmer normally throws an error or just programs until it runs out of space and goes "ok, job done, nothing out of the ordinary to see here!" :) I'm not at home right now, so I can't …

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Re: Non working Abit BE6-II

Posted on 2021-02-05, 08:21

by

by frudi

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The BIOS is 256 kB(ytes), that's 2 Mbits. You need a 2 Mbit chip for it.

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Re: Non working Abit BE6-II

Posted on 2021-02-05, 08:08

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by frudi

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

W29EE011 is a 1 Mbit CMOS, how did you manage to flash it with a 2 Mbit BIOS image?

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Re: Are all IIT 387 FPUs the same? 3C87 =/= 4C87DLC after all?

Posted on 2021-01-28, 15:42

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by frudi

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So I ran HWiNFO for DOS and it recognizes the FPU as IIT 3C87 at 37.3 MHz. I would attach a screenshot, but for some reason all text in HWiNFO is blinking for me (using an STB Systems ET4000AX), which my crappy phone camera can't deal with and refuses to focus on the monitor picture at all.

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Re: Are all IIT 387 FPUs the same? 3C87 =/= 4C87DLC after all?

Posted on 2021-01-28, 13:19

by

by frudi

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'm currently tinkering with another system, but I'll switch back to the 386 later and run HWiNFO on it to check what it reports for the FPU.

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Re: Are all IIT 387 FPUs the same? 3C87 =/= 4C87DLC after all?

Posted on 2021-01-27, 23:36

by

by frudi

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Am386DX-40 wrote on 2021-01-27, 21:59: Here it is, you can find IEEETEST in Disk2.zip Much appreciated! I attached images of my chip and results. I got the same results as your 1002FB.

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Re: Huge delta fans on a fan controller

Posted on 2021-01-27, 21:05

by

by frudi

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Those fans have an operating voltage range of 8 - 13.2 V, according to the spec sheet. They probably won't even start up at 5 V, perhaps at 7 V. They will be unbearably loud even at that speed, take it from someone who used to run an 80 mm Vantec Tornado at 7 V back in the day. Unless you have …

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Re: Are all IIT 387 FPUs the same? 3C87 =/= 4C87DLC after all?

Posted on 2021-01-27, 20:48

by

by frudi

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'd be happy to test my 1002FC chip, but where could I download this IEEETEST program? Searching for it has proven completely fruitless.

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Re: How to know if a video card is 64bit or 128bit?

Posted on 2021-01-25, 08:41

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by frudi

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

There's also QFP ram chips (like on this card) which also typically come as 4 chips per 128-bit bus. That's because BGA and QFP packages have enough room for 32 data pins. On the other hand TSOP ram chips, like on the card in OP, can only fit 16 data pins, that's why twice as many chips are needed. …

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Re: How to know if a video card is 64bit or 128bit?

Posted on 2021-01-22, 13:11

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by frudi

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

RandomStranger wrote on 2021-01-22, 12:39: And some Korean site with a couple of high resolution images where some branding is showing. You can make out the markings on the memory chips in some of those images. The datasheet for those chips shows they're 16-bit, so with 4 of them on the card it is …

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