Head-to-head used CPU value

Intel Core i7-9800X X Series vs Intel Core i5-10400

Intel Core i7-9800X X Series currently offers better used gaming performance per dollar. Tracked gaming performance is effectively tied.

Prices updated Sep 6, 2026
Used price differenceIntel Core i5-10400 is 78.4% higher
Gaming differenceEffectively tied
Value differenceIntel Core i5-10400 is 43.9% lower

Which CPU Should You Buy?

Gaming value, productivity, and total platform cost can point to different winners.

Best Gaming Value

Intel Core i7-9800X X Series currently provides more tracked gaming performance per used dollar. Recheck the live prices before buying because a small market move can change the winner.

Productivity And Core Workloads

Intel Core i7-9800X X Series is about 44.7% faster in the tracked Cinebench R23 multi-core result. Core count, cooling, and application behavior still affect real workloads.

Platform And Upgrade Cost

Socket data is incomplete for this pair. Intel Core i5-10400 has a 100 W lower tracked TDP.

Price, Benchmark And Platform Comparison

Used price uses the latest median, then the 25th percentile or minimum as fallback.

MetricIntel Core i7-9800X X SeriesIntel Core i5-10400
Current used price$50$89.22
Current new price$122.43$124.99
Relative gaming performance5555
Gaming performance per dollar1.0960.615
Cinebench R23 multi13,7017,577
Cinebench R23 single1,1871,126
Cores / threads8 / 166 / 12
Socket--
TDP165 W65 W
Release year20182020
Qualified sales522
Full valuation

Intel Core i7-9800X X Series

Open price history, fair value range, confidence, and complete specifications.

Full valuation

Intel Core i5-10400

Open price history, fair value range, confidence, and complete specifications.

Build-level estimate

PC Value Calculator

Estimate what a complete gaming PC containing either processor may be worth.