Motherboard Diagnostic Card Prices
Current market data for 779 motherboard diagnostic cards.
What you'll usually pay
💡 Used ones cost about 19% more here.
👉 In short easy summary
The best value is found in Universal cards and Mini PCI ports, which are 31% and 39% below the median respectively. Memory slot types command the highest premium at 41% above the median.
💚 Best value for your money
Price by compatible port
Why? Prices vary by interface, with Mini PCI at 7.99 and Not Specified at 14.6.
Price by type
Why? Specialized memory slot cards are more expensive at 18.47 compared to motherboard port types at 11.36.
Price by compatible motherboard brand
Why? Universal cards are cheaper at 8.99 than unspecified brands at 14.49.
🛒 Some on sale right now
Common questions
What is the average cost of a motherboard diagnostic card?
The market median price is 13.12.
Are new diagnostic cards more expensive than used ones?
No, the new median is 14.26 while the used median is 17.
Which port type is the most affordable?
Mini PCI cards are the most affordable with a median price of 7.99.
How we got these numbers
Worked out from 200 live eBay listings (price range $7–$48, odd outliers ignored). These are asking prices, so use them as a guide. Last checked August 10, 2026.