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Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-05-17, 21:51

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Then, what is best, Biostar MB-8433UUD-A or PCChips M919 v 3.4? And, why i cant overclock at 133? Note: I found a "dirty cheat", it makes the IBM 5x86 100HF run at 133 for a few seconds I put at 40x2=80, 5V then, when MS-DOS started, i remove the B jumper and put it rapidly in A jumper This makes …

Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-05-18, 01:35

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

A lot of the answers to these questions can be found by searching the forum. From my experience, 1) I believe the IBM 5x86 100HF is a 120 MHz Cyrix part. I don't know why IBM calls it 100HF? HF = High Frequency? It doesn't overclock well to 133 MHz, not just because of the frequency, but these CPUs …

Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-05-18, 02:48

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You can answer me some of the questions?, because i am so tired for Search in the forum What are the best DOS Benchmarks? You flashed the BIOS? How i know how many NS is the ram? If you see 1998 errors, please let me know There are some DOS CPU Stress program? How i can optimize Quake FPS score …

Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-05-18, 03:53

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

3) What numbers? the ones on the chip or in sticker 7)The registers for optimize the video performance, for example: 3dBench, Quake, etc.

Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-05-18, 05:45

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

On the chip.

Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-05-18, 05:53

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The chips say AR514400-07 624 And what about the 7 question? PS: What are the imprescindible Windows 3.1 programs? From where i can download Realtek RTL8139 Windows 3.11 driver? Until what hour you are available on VOGONS?

Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-05-18, 11:06

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The chips say AR514400-07 If your SIMM memory module has -07 at the end of the really long line, then it's probably 7ns ;) Best is to always read the last numbers in the longest line on the chips themselves ;) As for BIOS tweaks, I don't know much about that myself. ...and grats for finding that …

AMD 486 DX4-90?

Posted on 2011-05-26, 14:45

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

What the hell is this? How do you get 90mhz from a 486 motherboard?

Re: AMD 486 DX4-90?

Posted on 2011-05-26, 15:54

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

3 x 30 MHz.

Re: AMD 486 DX4-90?

Posted on 2011-05-26, 16:42

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

batracio wrote: 3 x 30 MHz. I have yet to see a 486 motherboard with a 30mhz jumper setting. Why would anyone create a 30mhz setting when there is 33?

Re: AMD 486 DX4-90?

Posted on 2011-05-26, 17:18

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have yet to see a 486 motherboard with a 30mhz jumper setting. Why would anyone create a 30mhz setting when there is 33? I thought the same thing when I tried to install an AM486 DX4-90 on a standard motherboard (Chaintech 4UPB) and couldn't find the 30 MHz jumper. Finally I enabled the 33 MHz …

Re: AMD 486 DX4-90?

Posted on 2011-05-26, 18:01

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have yet to see a 486 motherboard with a 30mhz jumper setting. Why would anyone create a 30mhz setting when there is 33? I thought the same thing when I tried to install an AM486 DX4-90 on a standard motherboard (Chaintech 4UPB) and couldn't find the 30 MHz jumper. Finally I enabled the 33 MHz …

Re: AMD 486 DX4-90?

Posted on 2011-05-26, 21:21

by Old Thrashbarg

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'm pretty sure the DX4/90 was an OEM-only deal. I remember there being such an option on some of the low end Dell and Compaq systems for a little while at the tail end of the 486 era, and I wanna say my old Magitronic system had a 30mhz bus setting as well.

Re: AMD 486 DX4-90?

Posted on 2011-05-26, 23:03

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

How about poor old Socket 7 and 50, 60, 75, 83 and 95 MHz? 😁 😁 They really went overboard there.

Re: AMD 486 DX4-90?

Posted on 2011-05-27, 00:09

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Did you try 25? I'm surprised 33 didn't work. It would only be a 10mhz overclock which should be easy for these chips. No, I didn't. There was a hell of a lot of jumpers on that motherboard, and I had already run out of patience when I tried to run Doom and Duke Nukem 3D with an Intel DX2-66 and …

Re: AMD 486 DX4-90?

Posted on 2011-05-27, 06:58

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

How about poor old Socket 7 and 50, 60, 75, 83 and 95 MHz? :D :D They really went overboard there. And theres also teh awesome 96.2Mhz FSB lol, and on some boards (including ASUS) 60 and 66mhz also had a turbo setting, raising FSB by 2 more Megaherz!!1 3 x 30 MHz. I have yet to see a 486 …

Re: AMD 486 DX4-90?

Posted on 2011-05-27, 16:18

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I wonder if you can do 60 x 1.5 with it.

Re: AMD 486 DX4-90?

Posted on 2011-05-27, 16:40

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Got it on eBay some years ago. I think it was auctioned together with some other stuff, but can't remember exactly what else it came with. I don't really know if it still works and don't feel like trying it again. Would give it away for free if anyone is interested.

Re: AMD 486 DX4-90?

Posted on 2011-05-27, 16:43

by 5u3

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

sliderider wrote: I wonder if you can do 60 x 1.5 with it. The CPU only has two multiplier settings, x2 and x3.

Re: AMD 486 DX4-90?

Posted on 2011-05-27, 16:46

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Got it on eBay some years ago. I think it was auctioned together with some other stuff, but can't remember exactly what else it came with. I don't really know if it still works and don't feel like trying it again. Would give it away for free if anyone is interested. You should keep it ;) And just …

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