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Disappointing DFI ITOX G4V620-B experience

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First post, by Kahenraz

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I bought this motherboard off of eBay and have had a very unpleasant experience with it. Not only did it arrive damaged, but the functional experience has been less than to be desired.

I always perform a visual inspection of any hardware that I receive, and to my surprise, I found parts of this motherboard to be melted.or burned. I don't know how when or where this occurred, but it is the first instance where I've seen anything like it. The charred underside doesn't seem to intersect any traces, but I found parts of the motherboard to be non-operational regardless.

The most disappointing aspect of the board is that the AGP slot is only meant for flat panel expansion of the onboard Intel graphics, and cannot be used for traditional AGP cards. However, I also found that there was a strange quirk with PCI graphics cards as well. Despite the motherboard being able to initialize the PCI card, after loading into Windows XP, the system always switched back to the onboard graphics. This meant that it was impossible to use anything other than the onboard graphics from within Windows. I tested this with a PCI S3 Trio64V+ and a Voodoo 5 5500. There was no difference whether drivers for the Intel onboard graphics were installed or not, if the onboard graphics is disabled in the BIOS, or disabled from within Device Manager. PCI graphics do work fine from within DOS, however.

I also found there to be some kind of fault with the bottom two PCI slots on my motherboard. They were not receiving power, according to my diagnostics card, did not report any BIOS codes at startup either. One of the power rails would flash of I tilted the card back and forth in the slot, but that was it.

I don't know if I needed to do something special in the BIOS, but I could not get the onboard CF card slot to recognize from the BIOS or from within Windows, so I suspect that it's somehow damaged as well.

On a positive note, all three ISA slots work out fine with full DMA support and legacy IRQ/DMA reservation from within the BIOS.

The onboard IDE controller is also mediocre, supporting only up to ATA100 and suffers from an AWARD BIOS limitation of 33.8GB, even with the latest BIOS.

I found a weird quirk in the BIOS where it locks up when choosing the option to save changes and reset. I worked around this by using the BIOS from a similar board, the DFI ITOX G4V621-N. Unfortunately, even dated from 2007, this BIOS still suffers from the 33.8GB limit.

The front panel header is also somewhat annoying in that there is only a power-on pin. There is no reset pin. This means that using it in a modern case will have a dead button on most front panels.

I'm sure that someone can come up with a use case for this system as a retro machine. Early Intel graphics are actually quite good in this respect for compatibility, and they work well in pure DOS as well. But there are better motherboards for XP and an older board would with working AGP would be more flexible than just PCI.

This was a fun little adventure, but I am certainly unimpressed.

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Last edited by Kahenraz on 2024-03-19, 18:06. Edited 3 times in total.

Reply 1 of 32, by giantclam

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Smaller capacitor appears damaged?

yLWy0LU.png

Reply 2 of 32, by Horun

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Yes looks like something made some burns and that small cap should be replaced. This is a good example of why to never buy an Industrial OEM board unless you are already familiar with the exact model.
I had an Industrial MSI board that also had many issues, mostly bios related but also limitations in the actual design compared to a well known equal.....
Thanks for all the info !

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun

Reply 3 of 32, by Kahenraz

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It's the lighting. All of the capacitors are in excellent cosmetic condition.

The sticker on the BIOS is dated 2007, so it was actually manufactured quite late.

Reply 4 of 32, by fosterwj03

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I have a G4v620 in much better condition. I didn't know it had a IDE drive size limitation, but then I only use drives smaller than 32GB with it.

I use it as my NT 3.1, OS/2 2.x, and OS/2 1.3 retro rocket. It's super fast with a P4 3.066GHz HT processor. I also only use PCI video cards with it since I already knew about the AGP slot issue.

It works perfectly with my Sound Blaster 16 in all supported OSs I use with it.

Reply 5 of 32, by Horun

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fosterwj03 wrote on 2023-11-27, 00:25:

I have a G4v620 in much better condition. I didn't know it had a IDE drive size limitation, but then I only use drives smaller than 32GB with it.

I use it as my NT 3.1, OS/2 2.x, and OS/2 1.3 retro rocket. It's super fast with a P4 3.066GHz HT processor. I also only use PCI video cards with it since I already knew about the AGP slot issue.

It works perfectly with my Sound Blaster 16 in all supported OSs I use with it.

Nice except for the AGP issue. Having real DMA ISA support is always a plus.

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun

Reply 6 of 32, by fosterwj03

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If you need both ISA slots and a working AGP slot, you could try a G7S620. It uses LGA 775 P4s and Celeron.

I have one of these as well, but I was likewise a bit disappointed. One of my PCI video cards (my Mach32 card) refused to work with it. I wonder if this board has a bad capacitor somewhere.

Reply 7 of 32, by Kahenraz

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I wanted a working board, so I ordered another one of these. I'm happy to report that this one is much better, albeit with some caveats. The board revision is also different. The previous board only had the version number "1.3" and didn't match the photo from theretroweb.com exactly. The replacement I ordered is the same "B1" revision and looks identical. Both boards reported G4V620 in Everest, so they are in fact different revisions of the same board.

This one one also came with an updated BIOS from 7/25/2007, which is even newer than the one found on DFI's website. Unfortunately, it still does not support drives larger than 32GB.

The replacement board did not come without some issues though. There is a bulging capacitor near the CF card slot and there is a severed trace on the back. This trace corresponds to a pin on the parallel port, so it's not catastrophic, and is an easy thing to fix anyways.

Also of note is that CF cards are now recognized and bootable. This was another fault of the previous board. Unfortunately, it's still not possible to use a PCI card for video. Although I only tested this in Windows XP and not 98, the problem is that, after the initial boot screen, there is no display output on the PCI video card, even after setting it as the primary display output in the BIOS and disabling the onboard video entirely. So, again, this board is only useful if you are satisfied with using Intel graphics from within Windows.

Interestingly, this board has some kind of issue with ACPI shutdown. It doesn't power-off by itself from Windows XP, instead waiting on the familiar "it is now safe to turn off your computer" screen.

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Last edited by Kahenraz on 2023-12-01, 01:06. Edited 1 time in total.

Reply 8 of 32, by Kahenraz

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Some more photos. Oh, yes. It also seems to have been dropped at some point in its life.

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Reply 9 of 32, by Kahenraz

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Here is a copy of the 2007 BIOS. I can confirm that ACPI shutdown is broken, after testing it in the previous motherboard as well.

i845G-W83627-6A69VD4YC-00.zip

Reply 10 of 32, by Kahenraz

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Some more testing reveals that CPU support also differs between board revisions. The board labeled "rev 1.3" works with a 2.8Ghz P4 with a 533Mhz FSB (SL7PK), but this same chip does not work on the "rev 1B" board, and only causes it to power cycle. The rev 1B board came with a 2.0Ghz P4 with a 400Mhz FSB (SL6PK). This is despite using the same BIOS and both boards having the same Intel Brookdale-G i845GEV rev 03 chipset.

I wasn't able to do identify any difference in jumpers between the two boards that could explain the difference in CPU support. This is very odd. It looks like the board labeled "rev 1.3" is the newer revision then, if newer processor support is to be any indication.

Reply 11 of 32, by fosterwj03

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I just did a quick test on my board (labeled "Rev B1"). I can boot off of a 120GB SSD (attached to an IDE-to-SATA adapter) without any issues. The BIOS seems to recognize the drive properly.

I'm using the BIOS dated 5/28/2003 from the DFI/Itox website. I'm also using a P4 3.06GHz HT processor with it currently.

Reply 12 of 32, by Kahenraz

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I'm using a SanDisk 128GB CF card in an adapter. I can boot off if the card but only about 32GB is visible from the BIOS.

Reply 13 of 32, by fosterwj03

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I booted off of a pre-formatted and installed Windows XP drive. Windows recognizes all 120GB of space in the partition manager. The computer also shut down from software, so I think ACPI works properly as well.

Reply 14 of 32, by Babasha

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Will recheck my mobo for HDD compatibility next monday until i not sell it)))

Need help? Begin with photo and model of your hardware 😉

Reply 15 of 32, by Kahenraz

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fosterwj03 wrote on 2023-12-02, 15:05:

I booted off of a pre-formatted and installed Windows XP drive. Windows recognizes all 120GB of space in the partition manager. The computer also shut down from software, so I think ACPI works properly as well.

What disk size is reported from the BIOS? I formatted and partitioned on this board. Maybe the full LBA addressing past 32GB works properly once the system has booted into Windows?

The ACPI shutdown issue is only a problem with the 2007 BIOS.

Reply 16 of 32, by fosterwj03

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The BIOS reports a capacity of 120GB with over 50,000 cylinders.

Reply 17 of 32, by Kahenraz

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That's really weird... I've tried several BIOS versions and two different board revisions and each has this same problem.

You're using the BIOS from DFI's website?

Reply 18 of 32, by fosterwj03

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Yes, I downloaded the BIOS from DFI a couple of years ago to re-flash the board. It came to me with the Supervisor Password set. Re-flashing the BIOS cleared the password (some security?).

Have you tried a different type of large capacity drive like a spinning drive with an IDE interface?

Here's the link: https://www.dfi-itox.com/pages/support/mbd/show4v620b-g.htm

Reply 19 of 32, by Kahenraz

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I have tried this BIOS with the same result. I will try an IDE drive.

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