Re: Gainward Ti4600 - No signal when booting into Windows

Posted on 2025-06-01, 10:31

by

by zuldan

in Marvin \ Video

in Marvin \ Video

tehsiggi wrote on 2025-06-01, 10:18: They look clearly hand soldered. When I saw those i thought it was you when testing ESR. I tested different capacitors. My soldering is not that nasty 🤣

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Re: Gainward Ti4600 - No signal when booting into Windows

Posted on 2025-06-01, 10:02

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by zuldan

in Marvin \ Video

in Marvin \ Video

Just above the back of the connector on the front. They're labelled TP. There are heaps of them. But the ones on the right bear the main caps are the most likely to show voltage drops. Ahh yes sorry I see them now. I was looking at the DVI connector section. BUT....I think you're onto something. …

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Re: Gainward Ti4600 - No signal when booting into Windows

Posted on 2025-06-01, 09:37

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by zuldan

in Marvin \ Video

in Marvin \ Video

ok. C112 by the back of the connector doesn't look like other empty pads. Factory or missing? Sorry I'm not sure where this is located on the PCB. Can you give me more hints :) U819 top left looks odd. I get that its a factory option but it still looks hand soldered. U819.JPG You did notice the …

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Re: Gainward Ti4600 - No signal when booting into Windows

Posted on 2025-06-01, 08:49

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by zuldan

in Marvin \ Video

in Marvin \ Video

myne wrote on 2025-06-01, 08:46: Looked more closely at the pic. You have tried both DVI ports, yes? They appear to both be VGA converted by SI chips. Wouldn't b […] Show full quote Looked more closely at the pic. You have tried both DVI ports, yes? They appear to both be VGA converted by SI chips. …

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Re: Need help with PCI TNT2 GPU card

Posted on 2025-06-01, 08:34

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by zuldan

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

keeper5511 wrote on 2025-06-01, 08:33: Yes I have cleaned them with Isopropyl alcohol Next thing to try is if NVFLASH can read the cards BIOS. Try backing up the BIOS with NVFLASH -B backup.rom

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Re: Need help with PCI TNT2 GPU card

Posted on 2025-06-01, 08:25

by

by zuldan

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Starting with the basics…have you cleaned the copper contacts with some IPA throughly?

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Re: Gainward Ti4600 - No signal when booting into Windows

Posted on 2025-06-01, 07:13

by

by zuldan

in Marvin \ Video

in Marvin \ Video

Interesting. Especially that it is a "time related issue". Does the time vary between "runs" and "no signal" with memory at normal clock, if you perform many 2D draw actions? Like opening files, refreshing the desktop etc? If the timing is fairly consistent and unrelated to that, it doesn't sound …

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Re: Gainward Ti4600 - No signal when booting into Windows

Posted on 2025-06-01, 06:43

by

by zuldan

in Marvin \ Video

in Marvin \ Video

Glad we're checking this. So apparently Gainward does use a slightly different BOM. They are using 1k for R1038 (as MS8872) but 750Ohms for R1039 (instead of 1k) - this leads to the reference voltage for the second channel of the SC1175 to be exactly 1.2V, which is spot on in your testing. I wonder …

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Re: Gainward Ti4600 - No signal when booting into Windows

Posted on 2025-06-01, 06:39

by

by zuldan

in Marvin \ Video

in Marvin \ Video

myne wrote on 2025-06-01, 06:32: Again, it can just as easily be the mosfets or drivers. In all seriousness, give it a wash. Yes. Wash. In the sink. Will do!

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Re: Gainward Ti4600 - No signal when booting into Windows

Posted on 2025-06-01, 06:29

by

by zuldan

in Marvin \ Video

in Marvin \ Video

Glad we're checking this. So apparently Gainward does use a slightly different BOM. They are using 1k for R1038 (as MS8872) but 750Ohms for R1039 (instead of 1k) - this leads to the reference voltage for the second channel of the SC1175 to be exactly 1.2V, which is spot on in your testing. I wonder …

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Re: Gainward Ti4600 - No signal when booting into Windows

Posted on 2025-06-01, 05:26

by

by zuldan

in Marvin \ Video

in Marvin \ Video

Was the memory at stock? It sounds similar to a dud mosfet/driver. As soon as the load goes up, the mosfet/driver can't deal, and the core stops. Of course, with 20 year old capacitors, it's more than likely they're the cause. Switching power supplies are exactly what they sound like. They rapidly …

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Re: Gainward Ti4600 - No signal when booting into Windows

Posted on 2025-06-01, 05:20

by

by zuldan

in Marvin \ Video

in Marvin \ Video

zuldan wrote on 2025-06-01, 05:10: tehsiggi wrote on 2025-06-01, 04:56: Now i am curious. Could you check the markings on r1038 ans r1039? Perhaps gainward uses different values. I'm having trouble locating r1038 ans r1039 on the PCB 😉 Going to have another look... Never mind, I found them... …

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Re: Gainward Ti4600 - No signal when booting into Windows

Posted on 2025-06-01, 05:10

by

by zuldan

in Marvin \ Video

in Marvin \ Video

tehsiggi wrote on 2025-06-01, 04:56: Now i am curious. Could you check the markings on r1038 ans r1039? Perhaps gainward uses different values. I'm having trouble locating r1038 ans r1039 on the PCB 😉 Going to have another look...

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Re: Gainward Ti4600 - No signal when booting into Windows

Posted on 2025-06-01, 00:19

by

by zuldan

in Marvin \ Video

in Marvin \ Video

Just some things I've noticed as well: The card appears to derive the main voltages the following way: FBVDD is generated from the 12V from the AGP slot. VTT is generated from FBVDD. NVVDD is generated from the 3.3V from the AGP slot. The core takes up to 10A at 1.7V, meaning around 17W, this would …

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Re: Gainward Ti4600 - No signal when booting into Windows

Posted on 2025-06-01, 00:13

by

by zuldan

in Marvin \ Video

in Marvin \ Video

I just had a check. Your card has the same layout as the MSI Card MS8872 - 200. I looked at the schematic, from your marked voltages from top to bottom we have: VTT (Termination voltage) FBVDD (Framebuffer voltage aka. Memory voltage NVVDD (GPU) FBVDD and NVVDD are on point, supposed to be 2.8V and …

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Re: Gainward Ti4600 - No signal when booting into Windows

Posted on 2025-05-31, 23:20

by

by zuldan

in Marvin \ Video

in Marvin \ Video

Archer57 wrote on 2025-05-31, 10:22: zuldan wrote on 2025-05-31, 09:17: Here are some basic voltages Are those still fine when the screen goes blank? Yes voltages remain the same after the screen goes blank

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Re: Gainward Ti4600 - No signal when booting into Windows

Posted on 2025-05-31, 23:11

by

by zuldan

in Marvin \ Video

in Marvin \ Video

What board/platform is this ? What drivers did you used for chipset ? Do you get into Windows in VGA mode ? Did you tried both DVI ports ? Do you tried VGA (on both ports) ? What board/platform is this ? - > I've tried a Biostar M7VIT 800 (in the picture), ABIT AB-NF7-S V2.0 and a MSI K8T Neo. What …

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Re: Gainward Ti4600 - No signal when booting into Windows

Posted on 2025-05-31, 10:38

by

by zuldan

in Marvin \ Video

in Marvin \ Video

I just had a check. Your card has the same layout as the MSI Card MS8872 - 200. I looked at the schematic, from your marked voltages from top to bottom we have: VTT (Termination voltage) FBVDD (Framebuffer voltage aka. Memory voltage NVVDD (GPU) FBVDD and NVVDD are on point, supposed to be 2.8V and …

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Re: Gainward Ti4600 - No signal when booting into Windows

Posted on 2025-05-31, 10:37

by

by zuldan

in Marvin \ Video

in Marvin \ Video

Archer57 wrote on 2025-05-31, 10:22: zuldan wrote on 2025-05-31, 09:17: Here are some basic voltages Are those still fine when the screen goes blank? Will check in the morning!

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Re: Gainward Ti4600 - No signal when booting into Windows

Posted on 2025-05-31, 09:49

by

by zuldan

in Marvin \ Video

in Marvin \ Video

Found an old version of MATS. Thanks Vogons! It supports Geforce 1 up to the FX series. It looks like the memory is 100% OK. Re: GeForce3 - mixing memory modules Filename MATS.JPG File size 729.18 KiB Views 665 views File license Public domain

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