I've got the same guts of the system as you:
K7V and Athlong 750....
 
The best way to do something without setting jumpers is use the softjumpers mentioned in the manual...then you can overclock some things from BIOS.
 
 
My video card wasn't posting problems at AGP4x w/ Fast Writes...but I WAS still installing from scratch...so, maybe the 640x480 vga setting had something to do with it.....I'll have Win2k installed this evening, so I'll let you know how I fare...what video card do you have?
 
And can you tell a fellow K7Ver any problems I might expect?
 
 
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BUILDING:
AMD Athlon 750 (Slot A)
Asus K7V Mobo
PNY 384 MB PC100 SDRAM
A-Top 901 Case
CL SB Live! X-Gamer
CL GB Annhilator Pro
Windows 2000 Advanced Server
Logitech Itouch Pro
Microsoft Intellimouse Explorer
Everglide (HL Giganta)
Logitech Quickcam Home(listed as WEB)
Logitech Soundman G1 Speakers
D-Link DFE-530TX+ Ethernet Adapter
 
Linux System(To be built)
PIII 500 (Pre CuMine)
PNY 32MB RAM (subject to change)
Seagate 1GB Hdd and Western Digital 325MB hdd
Tseng Labs ET400 vga video card(I.S.O Video Card(ATI?))
Sonic Impact S90
Intel Onboard Ethernet
Mandrake 7.0 or RedHat 6.2
I.S.O Ps2 Keyboard and Mouse
Compaq JBL Speakers

I have tried the softjumps, but since the CPU is HWblocked against overclocking, I can't change the CPU speed. The only thing I can do is to set the RAM speed to 124MHz. The stupid thing is that the next speedstep is 143MHz, and my RAM doesn't handle that
My videocard is a GeForce256 DDR-RAM (Asus V6800). If I try to activate the Fast Write (powerstrip) the machine just hangs, and I have to do a hard reboot. And it says u can use AGP 4x, but when I try to mark it, nothing happens (also powerstrip)
When I built my system, I just followed these points (from NTcompatible) and have had no problems with it.
 
Received the follow messages:
1)There are numerous problems with this
motherboard and Nvidia GeForce cards. Win2K will refuse to boot, giving
bluescreens, etc.
I managed to get mine operating, but it's
still somewhat flaky.
- Display DIMM interleaving in the BIOS
- Run the Nvidia 5.13 driver
2) I had all the same problems when I
started, but after I went through some newsgroups, I found out that by
disabling the DRAMM Interleave (I think it is set to "auto" by
default) it actually works pretty well.
3) Works well but need to change AGP and PCI drivers
otherwise you cannot install latest NVIDIA drivers. You need to change them by
the AMD751's one. Open the directory Patch/W2000 of the CD and install the patch.
Then manually install :
AMD751 Processor to AGP Controller
AMD751 Processor to PCI bridge
 
Let me know how your building goes, and also if u find anything about the AGP 4x.

Not sure where I found this on here, but there's a registry fix(hack) that enables your AGP to run at 4x.
 
It's been posted recently...
 
------------------
OBSIDIAN (Win2k System)
---Custom Built---
AMD Athlon 750(model 2) retail (Slot A)
Asus K7V Mobo BIOS revision 1007-02c(beta)
PNY 288(295 listed)MB PC100 SDRAM (2x128 & 1x32)
A-Top 901 Case & 300W Athlon Approved Power Supply
3 Internal 80mm fans
CL SB Live! X-Gamer Liveware 3 Drivers-only
CL GB Annhilator Pro
Windows 2000 Advanced Server (SP1)
Logitech Itouch Pro
Microsoft Intellimouse Explorer
Everglide (HL Giganta)
Logitech Quickcam Home(listed as WEB)
Logitech Soundman G1 Speakers
D-Link DFE-530TX+ Ethernet Adapter
Hauppauge! WinTV GO
 
INFERNO (Win9x(ME) and Linux System)
---Compaq Presario 5600i---
PIII 500(498 listed) (Pre CuMine)
Compaq 128(131 listed)MB RAM
Seagate 1GB and either a 3.2GB or 4GB Hdd
ATI Xpert 98 video card
Sonic Impact S90
Intel Onboard and (Unknown) ISA Ethernet cards
Mandrake 7.1
PC Concepts AT-to-Ps2 Keyboard
Logitech First Wheel Mouse
Compaq JBL Speakers