American seller
eBay member for over 20 years.

RARE Soyo 5TC2 Socket-7 AT Motherboard
4x ISA, 4x PCI slots
Intel 430FX (Triton) chipset
Supports Pentium up to 200MHz, AMD-K5 to PR200, Cyrix up to PR166
256K SRAM Write-Back Cache
Multi-I/O — FDD/IDE/1P/2S/PS2 mouse
Updated to latest Award BIOS (v1015)
Manufactured Oct 1995
sn. 128889
Fully Tested with 30 day warranty against defects

• We purchased Soyo motherboards directly from Soyo for our own PC production, supplying state/federal government, schools, corporate and professional users.
• This board was removed during a routine upgrade decades ago and has remained unused, packed in protected storage ever since.
• Fully tested using Ultra-X professional diagnostics (see test results attached).
• Sold without CPU and RAM so you can configure as you wish.
• Supports up to 256MB of 72-pin EDO or FPM SIMM, parity or non-parity.
• Supports Pentium processors 75-200MHz, AMD-K4 PR75-PR200 and Cyrix 6x86 PR90-PR166.
  • FSB 50, 60 or 66MHz
  • Multipliers 1.5, 2.0, 2.5 or 3.0x
  • Single-volt processors 3.3v or 3.52v
  • This version does not support dual-voltage processors such as MMX
• 256K write-back SDRAM cache with 64MB cacheable range.
• In case you're wondering, the long brown slot is for optional cache expansion to 512K using a 256K Pipelined Burst SRAM COASt module.
• 4-layer PCB with dimensions of 220mm x 280mm.
• Four 32-bit bus-master PCI slots, plus four 16-bit ISA slots give you the best of both worlds.
• Headers: FDD, 2xIDE, Parallel, 2xSerial, PS/2 mouse (cables not included).
• Perpetual Dallas RTC — modified with an easily replaceable modern CR2032 cell.
• Note: this modified Dallas RTC chip by itself is worth $30.
• OPTION: If you prefer, we can install a freshly manufactured genuine Dallas RTC chip with embedded non-replaceable battery guaranteed to run 10+ years. Just leave a note on your order, otherwise this Perpetual Dallas chip will be installed. To be honest, the Perpetual Dallas chip is more valuable, because it took personal time and skill to create, but I'll be happy to substitute a genuine recent production Dallas RTC chip. If you have a flat Dallas chip and need a new one, see my other listings. Note: most of the Dallas chips sold on ebay are very old and will fail soon, if they haven't already — Look at the manufacture date code!
• NO CORROSION (Dallas RTC/batteries did not leak so there was no risk of corrosion).
• NEVER USED ORIGINAL MANUAL INCLUDED.
• Addition manuals, jumper settings, info available here:
  https://theretroweb.com/motherboards/s/soyo-sy-5tf
• Note: the Perpetual Dallas RTC, SRAM, and 1Mb Flash chips alone are worth $80!
• Cables not included
  
• 30 day warranty.

You will receive exactly the item you see in the photos.

Shipped via fast USPS Priority Mail with full tracking. Shipped from a USPS SCF (Sectional Center Facility) so delivery anywhere within the U.S. is only a few days away (excluding the occasional USPS misdirect).

NOTES ON TESTING :
• All low-level core functions tested with Ultra-X professional diagnostic software specifically designed to test these early motherboards.
• Tests included a burn-in loop of more than 10 minutes (see attached report for list of tests performed).
• Memory slots fully populated so all memory slots are tested.
• Serial and parallel ports tested using internal loop-back function.
• Sold with 30 Day Warranty — If the board fails or a defect is found within 30 days of purchase, I will stand behind the product. Please contact me with details and we will resolve the problem or work out an appropriate solution.
• For practical reasons, I cannot test every slot, memory combination, processor, header, port, or configuration, etc.
• Please contact me if you encounter any issues or have questions.