It is important to consider the ongoing problems Intel faces with CPU performance hindered by Spectre mitigation, too. If you want a 9900K new, it’s best to pick one up now. Given the massive price cut, we expect Intel has already shipped its remaining stock to retailers. The 9900K is almost two generations old, with Intel gearing up to launch the its 11th-gen Rocket Lake processors. The 3900X is still available, though we expect AMD to start phasing it out soon. AMD replaced the 3900X with the 5900X in 2020. The XT variant is clocked 100MHz faster out of the box, but that’s the only difference. The 3900XT may be more readily available depending on where you shop, and it’s almost identical to the 3900X. The 3900X is back-ordered at most retailers as of March 2021. The 3900X is closer to its launch price, selling for around $480. You can commonly find a 9900K for around $400. Although the 9900K was more expensive than the 3900X at launch, it’s cheaper now (a new position for Intel).
AMD’s edge in both tests - not in a single test, as was the case with Fortnite - shows its capability as a gaming CPU. As with Fortnite, both processors delivered above 150 fps across our trials. Most grand strategy games stress the CPU more than the GPU, as the processor handles A.I.-driven opponents and multiple interconnected systems. Across high and low settings, the 3900X beat the 9900K. We saw the most drastic difference in Civilization VI. In Fortnite, the 9900K shot ahead of the 3900X with high settings, but with over 250 fps in all of our tests, that difference hardly matters. The 3900X showed a decent lead in 3DMark, while in Assassin’s Creed Odyssey, it matched the 9900K on high settings and exceed it on low settings. That might not be the crushing numbers that AMD fans hoped for, but this is the first time in more than 10 years that a high-end AMD CPU beat the Intel competition in gaming. In our gaming tests with Fortnite, Civilization VI, and Assassin’s Creed Odyssey, the 3900X beat out the 9900K - a CPU previously hailed as the best gaming chip ever made - on almost all settings, showing a slight lead. Intel has held a performance edge in gaming for more than a decade, and even with AMD’s fantastic first- and second-generation Ryzen CPUs, that held true. Its huge L2 and 元 cache effectively eliminate the memory latency concerns from the 2nd-generation chips, too. The 3900X has seen a major increase in instructions per clock over its second-generation predecessors, so it’s more powerful than the 9900K clock for clock. AMD’s automated overclocking can take it up to 4.3GHz in some cases, though it’s very much dependent on your motherboard, BIOS revision, and cooling. The 3900X can boost to 4.6GHz on a single core, but will be closer to 4.1GHz if using all cores and threads at the same time. Most games now use a handful of cores, so unless you’re overclocking, you won’t typically see 5GHz frequencies when gaming on a 9900K. The 3900X has more cores and threads, while Intel’s chip has the stronger clock speed, especially when it comes to single-threaded workloads.
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