Ryzen 7 7800X3D vs Core i9-9900KF
Compare the Ryzen 7 7800X3D and Core i9-9900KF on real gaming and productivity benchmarks, full specifications, live retailer prices and performance-per-dollar, then jump straight to the cheapest in-stock option.
The short answer
The Ryzen 7 7800X3D is the better buy here: it's both faster for gaming and gives more performance per dollar.
- Ryzen 7 7800X3D is about 100% faster for gaming at 1080p (gaming index 85.6 vs 42.7).
- Ryzen 7 7800X3D is roughly 91% faster in multi-core work, an edge in rendering, encoding and compiling.
- Ryzen 7 7800X3D is the cheaper chip right now, by roughly 19%.
- Ryzen 7 7800X3D delivers about 139% more gaming performance per dollar.
- Core i9-9900KF has a lower TDP (95W vs 120W), so it runs cooler and is easier to cool quietly.
Gaming performance
CPU-bound gaming score: a geometric mean of in-game frame rates at 1080p, normalized so the fastest gaming CPU we track = 100.
Does the CPU matter at 1440p or 4K? Much less. At higher resolutions the graphics card sets the frame rate, so the gap between two CPUs shrinks — often to nothing. The 1080p figure above is the demanding case, where the CPU is stressed and the difference actually shows.
Performance per dollar
Gaming index divided by the current lowest price — higher is better value. This moves with the market as prices change day to day.
The Ryzen 7 7800X3D gives about 139% more gaming performance per dollar at today’s prices.
Full platform cost
A complete-platform price needs a live CPU price and an in-stock compatible motherboard on both sides. We can’t build one for Core i9-9900KF right now, which is common for older sockets like AM4 where we don’t track current boards. The gaming, value and specs comparisons still apply.
Specs head-to-head
Productivity & compute
Efficiency
Gaming performance per watt (gaming index per 100W of TDP) — higher means more frames for the heat and power.
Where to buy
Ryzen 7 7800X3Dfrom $333.99
| Retailer | Availability | Price | Buy |
|---|---|---|---|
| Amazon | — | See on Amazon |  |
| B&H | In stock | $339.00 |  |
| Newegg | In stock | $389.00 |  |
Core i9-9900KFfrom $399.00
| Retailer | Availability | Price | Buy |
|---|---|---|---|
| Amazon | In stock | $399.00 | |
Affiliate disclosure: Some links on this page are affiliate links — MaxMyBuild may earn a commission at no extra cost to you if you buy through them. As an Amazon Associate, MaxMyBuild earns from qualifying purchases. For Amazon, current price and availability are shown on the Amazon product page; product prices and availability are accurate as of the date and time of purchase and are subject to change. Prices shown for other retailers are approximate and may differ at checkout. “Search” links are non-affiliate and provided for convenience only.