I have gotten some old Socket 478 AsRock boards, two P4i65G (http://www.asrock.com/mb/Intel/P4i65G/) and one P4i65GV (http://www.asrock.com/mb/Intel/P4i65GV/), i used some of them in some PC builds i made and i still plan to build a micro ATX P4 system with the P4i65G, None of them failed and all worked without issues for me. I wonder if someone here also had experience with these models.

I got inspiration from this thread (started by vetz): Asrock 775Dual VSTA & Core4Dual thread

The differences between the P4i65G and the P4i65GV are:
1 - The P4i65G is based on the Intel 865G and has a real AGP slot, in the other hand, the P4i65GV uses the AGP-less Intel 865GV and uses the propietary AsRock AGI slot for AGP cards which is based around PCI
2 - The P4i65GV has lower max IGP memory than the P4i65G

CPU support:
Officially, the fastet supported CPUs are the Pentium 4 3.4C and 3.4E GHz, almost all Socket 478 Processors are supported (I don't know about Gallatin support since is not listed in the CPU Support page)
Supported Architertures:
- Willamette P4 & Celeron variants
- Northwood P4 & Celeron variants
- Prescott P4 & Celeron variants

Unsupported Architertues:
- Unknown

Untested:
-Gallatin

GPU Support
The P4i65G support all AGP cards which works on a 1.5/0.8V AGP Slots, 3.3 V cards are NOT supported
About the P4i65GV and it's AGI Slot, it depends since AGI is not fully compatible with AGP and is slower than AGP. I still have to test AGP cards on the P4i65GV
Asrock has a list of supported VGA (Not complete) for the P4i65GV here: http://www.asrock.com/mb/Intel/P4i65GV/?cat=VGA

Memory Support:
Both boards supports up to 2x 1 GB DDR 400 Sticks
I haven't really tested Memory perfomance, but i can try beching and compared to other P4 systems i own, like my P4 builds with the ASUS P4P800-E Deluxe, the Gigabyte 8IPE1000-G and my OEM HP D530

I/O Connectors and other features:
Both boards features 2x SATA 150 Ports (No RAID nor Hot-plug support), 2x ATA-100 Ports, 1 Floppy drive port, 3 PCI slots, 1 AMR, 1 AGP/AGI (depending of the model), 8 USB Ports (6 Ports on the rear and 2 for the front via USB67 Header port, USB4_5 Header is shared with 2 rear ports), 2 COM Ports (1 Rear and 1 via Header), LAN 10/100 via Realtek RTL8101L and AC97 Audio via C-Media 9761A AC97.

Overclocking/Underclocking:
I haven't really tried OCing with both Asrock models, only OC some Celeron Ds to FSB 166 without issues, i know the LGA 775 version of the AsRock 775i65G can OC the FSB to 266 Mhz (FSB1066), but i'm not sure on these models. FSB Underclocking is posible (at least with the P4i65GV) and it can go low as 66 Mhz (FSB 266). Needs futher testing i'll update it when i do that.

No CPU voltage ajustament support

OS Support:
Officially supports Windows versions from Win 98 SE up to XP, but it can run Vista and 7 without problems. There might be issues with Windows 98 SE and Prescott based P4s

Other Versions:
The P4i65GV variant as i said before, it uses the Intel 865GV and uses the propietary AGI slot to provide partial AGP support.

There are also the AsRock 775i65G and it's later revisions (R2.0 and R3.0) which is basically an LGA 775 version of the P4i65G, supports all LGA 775 Pentium 4s and Ds including Celeron Ds (both 90 and 65 nm models), R2.0 adds Core 2 Support (65 nm only) when R3.0 adds 45 nm Core 2 based Support (only Core 2 Duo E7xxx, Pentium E5xxx/6xxx and Celeron E3xxx), FSB 1066 Operations needs an AGP card and DDR400 CL 2.5 sticks

There also the AsRock 775i65GV as well which is based on the P4i65GV, but with LGA 775 Socket instead, unlike the 775i65G, the 775i65GV only supports Pentium D and 65 nm CPUs on PCB R1.04 or newer (older revisions are limited to single core 90 nm Prescott CPUs) when the updated version of the 775i65GV, the ConRoe865GV is the same as the 775i65GV, but with 65 nm Core 2 Support, but no FSB1066 nor Quad Support due to board limitations, best CPU for the ConRoe865GV is the Core 2 Duo E4700

¿What do you think about these models? ¿What is your experience with them?. I'll Keep the thread updated when i do more tests and get more info

¿Should i do an AGP vs AsRock AGI comparasion? I even thought about that, but i need yet to find a card which works flawlessly in both boards