Re: Asus p5a reboots running quake on IDT C6

Posted on 2021-06-08, 06:55

by

by Nemo1985

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The process of elimination is your friend . First, I would try swapping CPUs between working and non working machine and see whether fault follows the CPU or not. If thay is non conclusive, I would try swapping parts until either a) the issue follows the part b) having swapped everything, the issue …

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Re: Asus p5a reboots running quake on IDT C6

Posted on 2021-06-08, 06:07

by

by Nemo1985

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Maybe it does not have the needed instruction set, because IDT C6 is basically a 486. But a 486DX will run Quake. Maybe there are some math instructions missing, a 486SX will crap out, if you try to run Quake. So why on the other p5a it runs fine? Does the other p5a provide the missing instructions …

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Asus p5a reboots running quake on IDT C6

Posted on 2021-06-08, 05:33

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by Nemo1985

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hello fellow vogonians, my trials and tribulations with ss7 machines never end. I have 2 Asus p5a boards same revision (rev 1.04) and same bios version, one bought as working which works fine with the IDT C6 cpus, while the other (bought as untested) apparently works fine with his stock cpu (K6-2 …

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Re: Tseng mdram different models

Posted on 2021-06-04, 07:20

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by Nemo1985

in Marvin \ Video

in Marvin \ Video

He knows those things. He is specifically asking wether buying and installing two more MD908 A J-5-120 chips will make his ET6100 have 4MB of VRAM. He has tried MD908 S J-5-120 before and it didn't work. This is why he was wondering if the MD908 S J-5-120 is incompatible with his card. Now people …

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Re: Tseng mdram different models

Posted on 2021-06-03, 14:44

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by Nemo1985

in Marvin \ Video

in Marvin \ Video

I am probably unable to explain myself. This is my ET6000: photo_2021-06-03_16-40-56.jpg It uses the mdram SJ-5-100, when I check with nssi it detects 4mb of memory. Then if I socket the mdram chips on the et6100 it still detects 2mb and something memory instead of 4mb. Since the only difference …

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Re: Utsource.net selling fake stuff

Posted on 2021-06-03, 08:12

by

by Nemo1985

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Sorry, I edited the post on my phone and that must mave somehow messed things up. Reuploaded from PC. :D I was referring exactly to those things, thank you for the clarification. I suppose it's worth a try but i'm not confident. I should move the resistor from r23 to r24 and then add two caps on …

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Re: Utsource.net selling fake stuff

Posted on 2021-06-03, 07:12

by

by Nemo1985

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If you mean the solder spots marked blue in the attached picture, i am pretty sure those are for capacitors. The values are the same as on the capacitors next to the other chip. Wait, what pictures? I didn't see any attachment other than the chips picture I uploaded on the main post. When Tiido …

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Re: Utsource.net selling fake stuff

Posted on 2021-06-03, 06:05

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by Nemo1985

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If those fake chips were just plastic packages with legs, then them being soldered on the board or not would not have made any difference whatsoever unless the legs are all connected... aka, a metal plate with legs sandwiched in between two layers of plastic. Should I try to open one of the chips? …

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Re: Utsource.net selling fake stuff

Posted on 2021-06-03, 04:24

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by Nemo1985

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I didn't solder them my self, I wouldn't have the knowledge. But since we are gone to guessing. There isn't any empty spot for others capacitors, the board is fully popoluted, the only thing that are missing are 2 tiny resistors around the second cache chips. The pin layout is the same (just checked …

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Re: Tseng mdram different models

Posted on 2021-06-03, 04:15

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by Nemo1985

in Marvin \ Video

in Marvin \ Video

908 = 1 mb 909 = 1.125 mb 909 chips are rarely used outside of cut-down versions without 4 sockets. The thing is that are both labelled 908, I don't know why this thing 909 came out. The difference is just on the first letter (AJ vs SJ) and the access time (120 vs 100). That being said with nssi I …

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Re: Utsource.net selling fake stuff

Posted on 2021-06-02, 19:59

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by Nemo1985

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

firage wrote on 2021-06-02, 19:29: Utsource is flooded with Chinese rebranded refurbished and fake stuff same as all the other available sources for old chips. I wouldn't expect much trouble getting a refund. How actually? They refuse to complain despite the warranty.

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Re: Utsource.net selling fake stuff

Posted on 2021-06-02, 19:24

by

by Nemo1985

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Am I right in assuming this is about the cache upgrade on that DFI motherboard? If so what did you do apart from installing the second cache chip? Asus motherboard, it was sold as with 512kb of cache and 1024, no other things are needed since the tag ram is already populated. Which one? Sorry if …

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Re: Tseng mdram different models

Posted on 2021-06-02, 19:17

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by Nemo1985

in Marvin \ Video

in Marvin \ Video

That is reasonable price. specialty chips if limited use, will not be plentiful to find and will have bit of price to go with it. Just buy them. And yes, there are differences, one are 1MB and other is 1.125MB types, so have to match capacity by matching the part numbers to original: MD908 or MD909 …

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Re: Utsource.net selling fake stuff

Posted on 2021-06-02, 18:15

by

by Nemo1985

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Doornkaat wrote on 2021-06-02, 18:03: Am I right in assuming this is about the cache upgrade on that DFI motherboard? If so what did you do apart from installing the second cache chip? Asus motherboard, it was sold as with 512kb of cache and 1024, no other things are needed since the tag ram is …

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Re: Tseng mdram different models

Posted on 2021-06-02, 16:45

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by Nemo1985

in Marvin \ Video

in Marvin \ Video

15€-35€ each not including shipping. The cheapest ones I found in Germany were ~20€ each. That's the same price I found €30 for 2 mdram chips. Apparently there are ET6000 with the 120 installed Yeah, both of my cards have 120ns. I wonder if there is any difference on memory clock between the 2 …

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Re: Tseng mdram different models

Posted on 2021-06-02, 16:33

by

by Nemo1985

in Marvin \ Video

in Marvin \ Video

I have had a similar issue. It appears they are incompatible. I have been looking for MD908 AJ-5-120 MDRAM for my Apocalypse 5D for a while now. Sadly apparently it only ever surfaces at ridiculous prices so I'll have to keep on looking. Thank you for the confirmation, at what price did you find …

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Tseng mdram different models

Posted on 2021-06-02, 14:12

by

by Nemo1985

in Marvin \ Video

in Marvin \ Video

Hello, I'm having a question about the mdram. I have a ET6000 with 2 socketed mdram module they are called: SJ-5-100, they work fine on my ET6000 When I install them on my ET6100 which originally use AJ-5-120 they don't get detected from the ET6100. The model for both is MD908. I know that 100 and …

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Re: Utsource.net selling fake stuff

Posted on 2021-06-02, 08:18

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by Nemo1985

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

How do you know that those are fake? Did you open them and test? Not saying you are wrong, I am just interested in knowing how you determined they are fake. Yes, the guy I paid for tested all 4 of them and when installed the board didn't boot, while once those were took off the board worked like a …

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Utsource.net selling fake stuff

Posted on 2021-06-02, 05:25

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by Nemo1985

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So I did my order through utsource.net, the first time I bought some MDRAM for my tseng labs card, a bunch of SOJ40 memory chips and everyone but one were working fine. A month ago I did another order. I bought some more MDRAM chips and some cache chips. This is what I got: photo_2021-06-02_07-21-46 …

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Re: Aopen AX59 pro with general instability

Posted on 2021-06-01, 20:59

by

by Nemo1985

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If it works fine with a K6-3 or 3+ and the L3 cache disabled, then you need to replace those two cache SRAMs. Actually the problem is with frequency switching and random reebots with an agp video card installed. Probably the culprit is the pll chip. The main problem is to find another one, since …

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