Alternative to 645-ULTRA-C: Better-Value Equivalents in Stock
Comparing the 645-ULTRA-C (645 ULTRA-C - MSI 645 Ultra-C Desktop Board SiS 645 Socket 478 400MHz FSB 3GB DDR SDRAM DDR333/PC2700, DDR266/PC2100, DDR200/PC1600 ATX) against alternatives? Pro Disk Network stocks 12 similar parts that offer comparable performance at different price points. Each option below is in-stock, US-warehoused, and tested-and-certified before ship. Bulk pricing is available on quantities of 5+; B2B procurement can use Net 30 with PO.
About the 645-ULTRA-C
| SKU | 645-ULTRA-C |
|---|---|
| Product | 645 ULTRA-C - MSI 645 Ultra-C Desktop Board SiS 645 Socket 478 400MHz FSB 3GB DDR SDRAM DDR333/PC2700, DDR266/PC2100, DDR200/PC1600 ATX |
| Stock status | In Stock |
| Detail page | View 645-ULTRA-C › |
Alternatives to 645-ULTRA-C
Each part below is currently in our US warehouse, ships same-day for orders before 2pm ET, and includes our 90-day warranty. SKUs link to the full product page with photos, datasheets and B2B quote form.
P4S8X-MX - ASUS SiS 661GX/SiS 964 Chipset Pentium 4/ Celeron Processors Support Socket LGA478 micro-ATX Motherboard
SKU: P4S8X-MX
Price: $326.00
5187-0317 - HP System Board (Motherboard) Socket 478 for Pavilion 7xx Series SIS Desktop
SKU: 5187-0317
Price: $205.26
K8S-MX - ASUS Asus K8S-MX Desktop Motherboard SiS Chipset Socket PGA-754 1 x Processor Support 2 GB Floppy Controller Serial ATA/150 Ultra ATA
SKU: K8S-MX
Price: $282.20
D201GLY2 - Intel SIS SIS662 Micro ATX ESSENTIAL Series Desktop Motherboard
SKU: D201GLY2
Price: $235.79
P4S800-MX - ASUS Socket 478 P4/Celeron Motherboard max 3.06GHz+ SIS 661FX/963L
SKU: P4S800-MX
Price: $239.47
745884-001 - HP AMD A76M System Board (Motherboard) for ProBook 645 Gen1
SKU: 745884-001
Price: $235.79
9BE011-645 - Seagate DB35 Series 80GB 7200RPM IDE Ultra ATA/100 (ATA-6) 2MB Cache (CE) 3.5-inch Hard Drive
SKU: 9BE011-645
Price: $166.29
9BE012-645 - Seagate DB35 Series 160GB 7200RPM IDE Ultra ATA/100 (ATA-6) 2MB Cache (CE) 3.5-inch Hard Drive
SKU: 9BE012-645
Price: $192.08
How we pick alternatives
Every recommendation above was selected using these criteria:
- Spec parity — capacity, speed, port count, and form factor matched within a 10% tolerance
- Price spread — alternatives shown across the price range, so you can pick on budget
- Brand mix — both OEM-equivalent and trusted aftermarket, all certified
- Reliability data — preferred parts have failure rates below 1% in our 18-month return tracking
- In stock today — shipping today, not 4-6 weeks from now
Want a side-by-side spec comparison?
We can prepare a written comparison covering throughput, power draw, form factor and validated compatibility. Email sales@prodisknetwork.com or call +1 (407) 205-8454 — most quotes ship within 4 business hours.