Burnedoutplacebo
Member
Last Activity: 04-22-2025, 08:32 PM
Joined: 01-09-2023
Location: Texas
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thanks for the info.... -
Curios where these came from. Looking for one for an rtx 2070 and hoping modified files for the 20 series cards are also present wherever these were found....Leave a comment:
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Anyone know if these 3060 bios files are for the 8 or 12 gb versions of these cards?Leave a comment:
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Re: RTX 2080, atypical memory layout or schematic error?
Update on this. Turns out the whole "Found an NV device at domain 0 bus 1 device 0, but its memory cycle enable bit in PCI configuration space is turned off" was a problem with my motherboard or my CPU in my test rig. The thing fully died, and when I switched over to another junk rig I had lying around, problem is gone.
Have not fully fixed the card yet as I cant seem to get a good solder connection on my replacement chip, and another chip (B1) now is giving me error codes in mats.
Seems...Leave a comment:
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Re: RTX 2080, atypical memory layout or schematic error?
Another thought, maybe related.
During all of this around the time it quit working, I did once have the card seated in the PCEI slot, and plugged in the 8 pin power connector, while the power was on, card fans went to 100% until i switched the power off. When turned back on, all appeared normal.
Did not think much of it at the time, but maybe this damaged something?Leave a comment:
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Re: RTX 2080, atypical memory layout or schematic error?
Thanks for the interest. The board revision is V373 Ver: 4.0. I have been working off of a board-view for V373 Ver: 1.0 and it seems very close. I don't have a direct schematic so using a Ventus RTX 2080 schematic. Not all that close for component labeling, but good for understanding functionality.
Out of desperation, I did re-flow the core with no effect, but no harm thankfully, and issue remains....Leave a comment:
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Re: RTX 2080, atypical memory layout or schematic error?
Whelp, maybe the end of the road for this one. Must of done something stupid when playing with the straps.
This card card is not initializing. Displays picture until trying to load drivers. Code 43, GPUZ shows 0 MB for memory,. Replaced bios chip, triple checked all straps. All voltages and resistances seem normal.
Out of ideas for what to check next.Leave a comment:
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Re: RTX 2080, atypical memory layout or schematic error?
Wow, this is interesting. Thanks for the insights. I don't know the commands for running MODS memory tests, so will have to find instructions for MODS.
I guess the memory timings for samsung allowed the micron memory to work at the low FB frequency in MATS, but then failed when loading windows. The micron timings, did not allow the samsung to function even at the low FB frequency in MATS.
Wish I could play with it more, but need to figure out what I broke when playing with straps as I no longer can...Leave a comment:
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Re: RTX 2080, atypical memory layout or schematic error?
A bit of an update on this. I got a replacement micron chip from aliexpress and it worked, for a bit until another chip failed (A1).
I ordered a few replacement chips again but decided to play some with it and installed a samsung chip for the failed A1 chip. This did not work, so I moved the strap to select samsung memory. To my surprise, it then passed MATS/MODS. I thought micron chips can work on the samsung selection, so I tried loading windows, but it went to black screen.
Out of curiosity,...Last edited by Burnedoutplacebo; 06-07-2023, 08:45 AM.Leave a comment:
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Re: RTX 3070Ti works normal, but when let 10min to work on full it crash
could it be one phase of VRM not working?Leave a comment:
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Re: RTX 2080, atypical memory layout or schematic error?
Thanks for explaining it won’t work to mix and match memory brands.Leave a comment:
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Re: RTX 2080, atypical memory layout or schematic error?
I removed what I suspected was the D0 chip, following the usual high low pattern a shown in the picture, and not the schematic.
The picture and typical high (1) and low (0) pattern is correct. I verified running mat/mods and indeed the D0 chip is missing. Not sure what is up with the schematic.
Next try will be utilize a Samsung chip to replace the now missing Micron chip; maybe it will work?Leave a comment:
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Re: RTX 2080, atypical memory layout or schematic error?
Thanks for the help. The chips start with 8, so I think this means 18 and likely need replacing. Board revision is 373 v4.0.
As far as the chip arrangement, was following this image so still confused, but will study it some more.
If I swap a single Samsung chip for a single Micron chip, will it work or do I have to swap all the chips change straps to get it to function?...Leave a comment:
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RTX 2080, atypical memory layout or schematic error?
Working on an MSI 2070 that has mats/mods errors on memory D0. Tried re-flowing with no luck so likely to swap with another chip.
However, I noticed on a schematic for an MSI 2080 that the D0 is located prior to the D1 spot on the counter clockwise rotation.
Is this a schematic wrong or do some cards actually not follow the D1 then D0 layouts?
Another question if anyone can help, once I do figure out the correct chip, would it work swap this bad Micron memory with an equivalent Samsung chip rated for the same speed? Samsung is what I have on hand.... -
Re: Ampere PEX adn 1.8 v rails resistance value
Thanks for the insight. Yep dead core. 1.8v. Short went away when removed the core. Was hoping was a bad solder pad but checked the pads on the core itself that connect to the 1.8v. Line and found 1 at the 6 ohm level. Only one but it was the cause.Leave a comment:
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Re: Ampere PEX adn 1.8 v rails resistance value
Read resistance values from a working rtx 3070
1.8v = 2k ohm
5v = 4.9 k ohm
pex = 11 ohm
I think the PEX is okay but my project 3070 has a short on the 1.8v rail as it reads 5 ohms and a second short on the 5v rail where it reads 120 ohms.
Most likely i have a dead core causing the low 1.8v rail reading, not sure about the low 5 v rail reading but will continue to poke around on both rails to try to ID my short locations and verify if dead core.Leave a comment:
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Re: RTX3070 not detected/ no display - has all voltages and pex reset question
On my 3070 I have
pin 1 = 3.3
pin 2 = 3.3
pin 3 = gnd
pin 4 = 1.8
pin 5 = 1.8
That being said, my card is not working but my fault is likely elsewhere.
I would like to know the normal resistance value on the 1.8 v rail if anyone knows. Thanks...Last edited by Burnedoutplacebo; 03-20-2023, 02:03 PM.Leave a comment:
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Ampere PEX adn 1.8 v rails resistance value
Working on a Zotac RTX 3070 with: PEX at 1v and 6.3 ohm., the 1.8v rail is at 5 ohms. mem is at 1.3v and 42 ohms and the Vcore is 0.7 ohms ( about 0.4 ohms above my background reading) at 0.75 v.
Question, are the PEX and 1.8v rails resistance too low? Have no video so trying to decide if dead core or something fixable. Dont have oscilloscope so playing with possible bios problem too.
Advice on resistance values for pex and 1.8v rails appreciated.
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Re: Dell RTX 3080 black screen under heavy load RAM seems to be fine
Curios if this was resolved and fixed. I would have thought it was a memory problem but nothing shows this in the tests. Was it unstable power delivery? Considering buying an eBay card with same symptomsLeave a comment:
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