The KT7A was one of the last holdouts to have an ISA slot, so if you want to use an ISA sound card that's a major plus. It's why I bought one in September of 2001 - I suddenly needed a Socket A motherboard, and I wanted to be able to continue to use my ISA hardware modem as dial up was my only option at the time. KT7A guy has a thread on this board that will give you all of the ups and downs, but you already have one so that's half of the battle.
Abit KT7A (KT133A/VIA686B), Athlon XP Mobile 2500+

Abit KT7A-(raid) is one of the best boards if you want a system that can cover as much of the 90's as possible because of its ISA slot: it was built with an eye towards the past (SDRAM support, ISA) and an eye towards the future (FSB 266MHZ support).
However for an ultimate build for the year 2000 is far from being a good choice. I tested all chipsets for socket A and the best which one could buy in 2000 is the AMD760. The board you want is Abit KG7-RAID providing the best performance for the year 2000, 15% better than KT7A-RAID.
By the way which 1200 you got: 1200B with 200FSB or 1200C with 266FSB?

nd22 wrote on 2026-07-05, 00:31:

Abit KT7A-(raid) is one of the best boards if you want a system that can cover as much of the 90's as possible because of its ISA slot: it was built with an eye towards the past (SDRAM support, ISA) and an eye towards the future (FSB 266MHZ support).
However for an ultimate build for the year 2000 is far from being a good choice. I tested all chipsets for socket A and the best which one could buy in 2000 is the AMD760. The board you want is Abit KG7-RAID providing the best performance for the year 2000, 15% better than KT7A-RAID.
By the way which 1200 you got: 1200B with 200FSB or 1200C with 266FSB?

Thank you for the motherboard suggestion. I have the 266FSB 1200C, was kind of a random find.

If you got an ISA sound card such as AWE64 than KT7A would make an awesome machine for DOS. If you got a PCI card such as creative live and therefore you plan a Windows 9X machine than KG7 would be better and be ideally suited for the ultimate year 2000 build.
That being said with a 1200C and KT7A you would still get very good performance for the 1997-2000 games.
Be aware that building the "ultimate" of any kind can be very expensive.

Regarding the ISA slot on the KT7A-RAID, I have found that it ia great for DOS with a Soundblaster 16 (CT2290 in my case) but I had problems with a Yamaha YMF 719 board. Not sure if it was the motherboard that was the issue or just that my 1.4Ghz Thunderbird was too fast?

RetroPCCupboard wrote on 2026-07-05, 08:54:

Regarding the ISA slot on the KT7A-RAID, I have found that it ia great for DOS with a Soundblaster 16 (CT2290 in my case) but I had problems with a Yamaha YMF 719 board. Not sure if it was the motherboard that was the issue or just that my 1.4Ghz Thunderbird was too fast?

CPU speed is unlikely to be an issue as the FSB speeds(200Mhz or 266 Mhz) are so much faster than the ISA standard speed(8.33Mhz, but sometimes they use 8 Mhz as it is a "prettier" number, there is also the "high speed"(No longer a proper naming with later HW 😁) clock signal that is about ~14.3Mhz, but that is also much too slow in relation to the FSB), that they almost surely have decoupled the ISA bus from the FSB. The only way that the CPU speed can cause issues with the Yamaha YMF 719 board if they made some timing loop in the driver CPU speed dependant.

Just a friendly advice: if I were you I would drop the ultimate and just build it with what I got.
You already have the the brain - 1200c processor and the heart - Abit kt7a-raid board. You can get some 256 modules of SDRAM for cheap and a geforce4 ti 4200 card and you got yourself a system that will play all games from the late 90's at 60+ fps.
Be extra careful with the power supply: 25A on the 5V rail are required for such a system.

nd22 wrote on 2026-07-05, 11:11:

Just a friendly advice: if I were you I would drop the ultimate and just build it with what I got.
You already have the the brain - 1200c processor and the heart - Abit kt7a-raid board. You can get some 256 modules of SDRAM for cheap and a geforce4 ti 4200 card and you got yourself a system that will play all games from the late 90's at 60+ fps.
Be extra careful with the power supply: 25A on the 5V rail are required for such a system.

The whole "ultimate" thing is literally the point of the build. I already have several vintage PCs to fill this niche so this is just for the fun and challenge. Thanks for the reminder on the PSU.

nd22 wrote on 2026-07-05, 04:08:

If you got an ISA sound card such as AWE64 than KT7A would make an awesome machine for DOS. If you got a PCI card such as creative live and therefore you plan a Windows 9X machine than KG7 would be better and be ideally suited for the ultimate year 2000 build.
That being said with a 1200C and KT7A you would still get very good performance for the 1997-2000 games.
Be aware that building the "ultimate" of any kind can be very expensive.

The issues with Soundblaster Live cards are specific to the Via 686B southbridge, and the KG7 has the same 686B as the KT7A, so neither would be a good pairing for those cards. Other PCI cards (such as Aureal Vortex 2-based ones) would be fine though. Also, the AMD760 was a late 2000 design, but the boards with it were from 2001, as were all other DDR options for that matter.

To avoid a 686B in a 2000 Socket A board, your only option is really one with the AMD Irongate chipset using AMD's 756 southbridge. That narrows it down to one board: the Gigabyte GA-7IXE4. A classic, but the 100MHz FSB and RAM limitation means it won't be winning any performance prizes.

soviet conscript wrote on 2026-07-06, 19:04:

The whole "ultimate" thing is literally the point of the build. I already have several vintage PCs to fill this niche so this is just for the fun and challenge. Thanks for the reminder on the PSU.

If you want Ultimate, I guess you might want to max out the CPU for the motherboard that you choose. The KT7A only officially supports up to 1.4Ghz thunderbird I think. But some people have managed to get Athlon XP working. Mine worked with Athlon XP 2000+ without needing to do any BIOS updates or hardware hacks. Though the BIOS didn't know the name of the processor, and it's from 2002, so maybe too new for your project.

I built my 2000 PC with an MSI K7T Pro motherboard. It needed 4x new 4700uf caps. Board runs well with Palomino CPUs if you can handle the 100/200 FSB limitation.

soviet conscript wrote on 2026-07-06, 19:04:

nd22 wrote on 2026-07-05, 11:11:

Just a friendly advice: if I were you I would drop the ultimate and just build it with what I got.
You already have the the brain - 1200c processor and the heart - Abit kt7a-raid board. You can get some 256 modules of SDRAM for cheap and a geforce4 ti 4200 card and you got yourself a system that will play all games from the late 90's at 60+ fps.
Be extra careful with the power supply: 25A on the 5V rail are required for such a system.

The whole "ultimate" thing is literally the point of the build. I already have several vintage PCs to fill this niche so this is just for the fun and challenge. Thanks for the reminder on the PSU.

OK, if you want it go ahead and build the ultimate 2000 system. I hope you got deep pockets because a geforce2 ultra cost upwards of 100 euros these days.

dionb wrote on 2026-07-07, 12:12:

nd22 wrote on 2026-07-05, 04:08:

If you got an ISA sound card such as AWE64 than KT7A would make an awesome machine for DOS. If you got a PCI card such as creative live and therefore you plan a Windows 9X machine than KG7 would be better and be ideally suited for the ultimate year 2000 build.
That being said with a 1200C and KT7A you would still get very good performance for the 1997-2000 games.
Be aware that building the "ultimate" of any kind can be very expensive.

The issues with Soundblaster Live cards are specific to the Via 686B southbridge, and the KG7 has the same 686B as the KT7A, so neither would be a good pairing for those cards. Other PCI cards (such as Aureal Vortex 2-based ones) would be fine though. Also, the AMD760 was a late 2000 design, but the boards with it were from 2001, as were all other DDR options for that matter.

To avoid a 686B in a 2000 Socket A board, your only option is really one with the AMD Irongate chipset using AMD's 756 southbridge. That narrows it down to one board: the Gigabyte GA-7IXE4. A classic, but the 100MHz FSB and RAM limitation means it won't be winning any performance prizes.

You are correct; boards with AMD760 chipset appeared in 2001.
I did used Creative live with my KT7A and never encountered any problems.

I will probably never get a KT7A. I saw one pop up for sale locally for 20 EUR, but for some stupid reason I didn't contact the seller straight away and when I did it was sold. Classic case of you snooze you loose.

Good luck on your build!

I have a "ultimate" 2000 system, but its built around s423 Pentium 4 and RDRAM with my Voodoo 5 5500.

soviet conscript wrote on 2026-07-04, 22:35:

I guess my question is, is it worth it to hunt down an early DDR board for this project? Is the performance difference noticeable? Other than RAID capabilities on the board, does the KT7A offer anything notable?

There is a noticeable performance difference between DDR and SDR motherboards IF you run fast CPUs. With faster CPUs memory bandwidth quickly becomes a bottleneck, and DDR boards offer twice the theoretical memory throughout. With a 1200mhz Thunderbird the performance difference between a DDR and SDR board should be measurable, but only really apparent when trying to run demanding software and later games. I remember switching from a KT133A to a KT266 board back in the day made an impressive difference, and I was using an Athlon XP 1900+ CPU. On the other hand, while playing around with a 900Mhz Duron, there was little to no difference when running demanding games on a KT133 or KT333 since the CPU itself was the bottleneck.

I did tested exactly the CPU that the OP has, 1200C against its twin 1200B with 200FSB and it is exactly 10.33% faster thanks to its 133 MHz FSB:
Re: Socket A: Nvidia vs Via - battle of the platforms!

nd22 wrote on 2026-07-08, 06:34:

soviet conscript wrote on 2026-07-06, 19:04:

nd22 wrote on 2026-07-05, 11:11:

Just a friendly advice: if I were you I would drop the ultimate and just build it with what I got.
You already have the the brain - 1200c processor and the heart - Abit kt7a-raid board. You can get some 256 modules of SDRAM for cheap and a geforce4 ti 4200 card and you got yourself a system that will play all games from the late 90's at 60+ fps.
Be extra careful with the power supply: 25A on the 5V rail are required for such a system.

The whole "ultimate" thing is literally the point of the build. I already have several vintage PCs to fill this niche so this is just for the fun and challenge. Thanks for the reminder on the PSU.

OK, if you want it go ahead and build the ultimate 2000 system. I hope you got deep pockets because a geforce2 ultra cost upwards of 100 euros these days.

Thankfully, I already have a Geforce 2 Ultra. I think I scored it for $25 on ebay some 14 years ago give or take.

I am running into some contradictory information on if there were DDR Athlon boards available in 2000. for instance, the Gigabyte
GA-7DX seems to of been available in late 2000 and it used DDR and the AMD 761 chipset, though maybe there's some confusion on when the board was announced as opposed to when it was actually available.

There is no review available online about any AMD760 board in 2000. However there are lots of them in 2001. i would keep the KT7A with the 1200C and build the system with them.

vetz wrote on 2026-07-08, 06:44:

I will probably never get a KT7A. I saw one pop up for sale locally for 20 EUR, but for some stupid reason I didn't contact the seller straight away and when I did it was sold. Classic case of you snooze you loose.

Good luck on your build!

I have a "ultimate" 2000 system, but its built around s423 Pentium 4 and RDRAM with my Voodoo 5 5500.

There are also other decent KT133A boards with an ISA slot. Also, if you are comfortable with soldering there are some boards that have a footprint for ISA slot such as GA-7ZXE, that can be had for a reasonable price. But you might need to populate some passive component footprints as well, at least GA-7ZXE was missing a couple of transceiver ICs and resistors.