Re: Removing Heat Sink - GeForce 4 TI4400
Posted on 38 minutes ago
Method (A) or (B)? 😀
Re: Pentium 90 @ 120Mhz
Posted on 39 minutes ago
It's not possible to damage a 3.3-3.465V chip at 3.45-3.6V, you should ask for a refund as you got a defective CPU. Your P90 could probably handle 100MHz very well, and the performance would't be too far off the P120 due to the higher FSB.
Re: Removing Heat Sink - GeForce 4 TI4400
Posted on Yesterday, 17:07
Either put it in the freezer for about 1 hour, or use a hairdryer on the heatsink until you can barely touch it, then twist. I prefer the heat method as I've had more success using it, and after the freezer you'll need to dry the card anyway because of the condensation. In any case, be very careful …
Re: Can't seem to make heads or tails on a proper processor upgrade for abit Fatal1ty AN9 32X AM2
Posted on 2020-11-29, 23:18
AM3 CPUs support both DDR2 and DDR3 and they can work on AM2 boards provided there is BIOS support. Socket AM3 processors are able to run on Socket AM2 and AM2+ motherboards with appropriate bios updates, but not vice versa. AM3 processors have a new memory controller supporting both DDR2 and DDR3 …
Re: New Waveblaster card : Reptile Paradise - Yucatan FX
Posted on 2020-11-29, 10:28
Thanks everyone for the input! I must say I'm leaning more and more towards the Yucatan. However, There is a pretty good third party Sound Canvas soundbank for X2. Where can I find more about this one? I'd like to hear some demos, especially Duke Nukem main theme (Grab-bag) or the Warcraft II …
Re: Motherboard issue.
Posted on 2020-11-29, 10:00
Anyone has any idea what I could try or should I just take it back to be recycled? Since the beeps seem to indicate a video initialization error, I would try various video cards (AGP/PCI/ISA) to see if it POSTs. But if everthing proves unsuccessful and you deem the board to be recycle-worthy, I …
Re: New Waveblaster card : Reptile Paradise - Yucatan FX
Posted on 2020-11-28, 13:52
This comes just as I'm about to gift me something nice for the holidays, but I'm still a bit undecided whether it will be a X2 or a Yucatan FX. I aim for the closest experience to a SCB-55 but I find the prices for the actual thing a bit steep these days. I've listened all the demos of Yucatan FX I …
Re: Asus P5A - PS/2 mouse port not working
Posted on 2020-11-27, 20:35
On my board R12 is marked 564, which is 560kΩ. For the inductors I'd use 1µH as their value is not critical.
Re: Help needed reviving AST 486 motherboards
Posted on 2020-11-27, 00:48
I have the Bravo LP motherboard (Brooktree RAMDAC instead of AT&T). If you still need photos or capacitor values I can provide them tomorrow. No Premmia though 🙁
Re: Need help identifying 386/40 motherboard
Posted on 2020-11-26, 01:17
Possibly Biostar, judging by the logos on the BIOS and KBC stickers.
Re: What is the loudest hard drive you have???
Posted on 2020-11-25, 20:15
CM 5508. A somewhat abortive clone of a ST-412, made in Bulgaria. Got two of them, one still works (kind of...)
Re: Voltage adjustment on Socket 3 V4p89SP3 board
Posted on 2020-11-24, 00:22
Okay, here's the relevant bit from the datasheet: LM431.jpg Vref is a fixed 2.5V. I think R5 (1.2Kohm) and R15 (3Kohm) from your board correspond to R1 and R2 on the above schematic. If I'm right, replacing R5 with a 1.5Kohm will yield a voltage of around 3.75V, or 4 volts when using 1.8Kohm. Or …
Re: Voltage adjustment on Socket 3 V4p89SP3 board
Posted on 2020-11-22, 20:49
Seems there's a LM431 involved, so I feel that's a bit over my head. But check its datasheet and try to trace out the schematic, find out the two resistors connected to the Ref pin - with a little effort you can replace one of them with a variable resistor and obtain a wide range of voltages...
Re: 386 motherboard repair - CH-386-25D/33A
Posted on 2020-11-22, 20:43
Short on -12v is most likely caused by a tantalum capacitor, you'll have to check them one by one on that particular rail (shouldn't be too many, could be a single one). From the KB connector you should have 2 pins connecting to the keyboard controller (bios) chip, on Pin 1 and Pin 39 (data and …
Re: Voltage adjustment on Socket 3 V4p89SP3 board
Posted on 2020-11-22, 20:36
Should be possible, but not by altering the jumper as I suspect the only thing it does is to short out the series transistor when set to 5 volts. I think you will have to play with some resistors that bias the base of the TIP31C, or it could be something more complicated using a voltage reference. …
Re: Soltek Motherboard Start, Post, then stop. Can you help me ?
Posted on 2020-11-22, 20:29
I was thinking for a moment that maybe the front panel connector was a special one in the original case (which i don't have). Never thought about that, but I guess it's possible (if you never saw this board working properly, or better said, as expected). Who knows what oddities were implemented ( …
Re: 386 motherboard repair - CH-386-25D/33A
Posted on 2020-11-22, 19:42
Most likely 47 pF, the value isn't that critical. More important is to neutralize the battery spill in that area if you want to enjoy your board for the years to come. Use vinegar, old toothbrush, rinse with plenty of water and dry thoroughly (or just give the board a final bath in isopropyl alcohol …
Re: Soltek Motherboard Start, Post, then stop. Can you help me ?
Posted on 2020-11-22, 19:34
The text below the diagram is a standard one, present in one form or another in every ATX board's manual. It just describes how the switch works (power on or soft-off when pressed and released, force power off when held for >4s). Having 5v on both pins is not normal, and it's the reason your board …
Re: VRM very low voltage with MMX CPU on i430VX board
Posted on 2020-11-22, 19:19
Strange that it always outputs 3.3v and not taking into account the VR1 jumper settings (2.5v, 2.8v, 2.9v, 3.3v, 3.5v) This is the easiest to explain. Speaking off the top of my head, there are around 50 power (Vcc) pins on a S7 CPU. In the case of split power planes, those 50 are (almost) equally …
Re: Soltek Motherboard Start, Post, then stop. Can you help me ?
Posted on 2020-11-22, 18:58
From computerguy08's photo I deduce that in normal operation an ATX board powers on by momentarily pulling up a pin, but your board somehow has this thing reversed. I can almost bet the PLED pin is a ground, and now you keep pulling down the "power-on" pin, so the board starts when you momentarily …
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