Core i9-12900KS vs Core i9-11900KF
Compare the Core i9-12900KS and Core i9-11900KF 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 Core i9-12900KS is the better buy here: it's both faster for gaming and gives more performance per dollar.
- Core i9-12900KS is about 26% faster for gaming at 1080p (gaming index 67.4 vs 53.7).
- Core i9-12900KS is roughly 77% faster in multi-core work, an edge in rendering, encoding and compiling.
- Core i9-11900KF is the cheaper chip right now, by roughly 5%.
- Core i9-12900KS delivers about 20% more gaming performance per dollar.
- Core i9-12900KS has more cores (16C/24T vs 8C/16T), which helps in heavily threaded workloads.
- Core i9-11900KF has a lower TDP (125W vs 150W), 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 Core i9-12900KS gives about 20% 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 i9-11900KF 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
Core i9-12900KSfrom $469.99
| Retailer | Availability | Price | Buy |
|---|---|---|---|
| Amazon | In stock | $469.99 |  |
Core i9-11900KFfrom $449.00
| Retailer | Availability | Price | Buy |
|---|---|---|---|
| Amazon | In stock | $449.00 | |
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.