Top gaming CPUs available for purchase.
Top gaming CPUs available for purchase.
We couldn't distinguish them easily, just like SSDs. But if the OP wants the absolute top choice, even a small difference matters. I’d focus more on speed, efficiency, and price as Trinity. For me, that makes 14900K seem too far away no matter the performance.
The discussion centers on how the 7800x3D versus 14900k architecture affects performance. Essentially, the CCDs need to communicate efficiently across buses on the substrate before reaching memory controllers. Reducing unnecessary hops between components helps improve speed. While I’m not a chip designer, my grasp of the logic aligns with this idea. Even though 3D v-cache boosts speed, it may only address minor issues like memory latency and timing problems tied to MCM CPU design. The challenge seems to lie in handling tasks that push beyond typical cache levels, forcing delays before reaching system RAM. It appears Intel’s continued investment in 10nm and 5nm MCM with larger caches suggests they’re tackling these bottlenecks, possibly by adding more memory layers like HBM3. If Intel had used a bigger die on TSMC’s 5nm process, it could have been cost-effective and competitive against AMD for many years.
I don't think fast memory alone can compete with lots of cache. This has been tested with Intel CPUs in the past, where if you disable cores and drop clocks to match lower core count parts, the higher tier part still performs better for gaming. The whole reason that the 14900K performs better than the 14700K for gaming is that the i9 has additional cache. Obviously there's a limit to how effective that strategy is. But Intel absolutely needed to up their L3 cache values in the last couple of gens in order to compete with AMD for gaming. If the 14900K still only had the 16MB of cache for its P-cores that the 11900K had, rather than the 36MB it does have, it would be noticably worse for gaming. So while V-Cache is a bit of a hack to deal with a limitation of MCM architectures, it does give real performance improvements in gaming because games generally benefit from more cache beyond mere memory latency improvements.
I don't think so, but I lack the budgets for 14600k and 14900k to verify that. The additional L3 cache could offer some benefit in certain cases, yet I feel it's mainly a binning edge and a boost clock advantage. I haven’t observed any testing with a 12th/13th/14th gen i9, down-configuring the core and boost clocks to match the i5 and evaluating the impact. More significant than extra L3 cache is the jump in boost clocks from 14700k to 14900k—400MHz. Cache improvements aren’t easily compared directly to Ryzen setups. My main argument is that 3D v-cache, despite its quality, appears like a workaround for latency problems in MCM designs, especially when contrasted with Intel’s monolithic chips where memory controllers are more intricate. This might explain why Ryzen handles timing better and can’t match Intel CPUs as low as possible. The idea is that key operations in certain apps reside within the 104MB of L2+L3, thus avoiding the full path to system RAM and lowering latency for those tasks.
The most notable testing I've encountered comes from Hardware Unboxed's IPC evaluation, where they disable E cores and clocks for the 12th, 13th, and 14th generation processors at 5.0GHz. This highlights the distinction between i9 and i7 chips when clock speeds match, with the sole variance coming from cache differences. The clearest variation appears in Balder's Gate 3—a game that relies heavily on cache performance—where the 14900K outperforms the 14700K by about 2% overall and 5% more for lower frequencies. Given the significant impact of cache, their results suggest otherwise if core count were the only factor. When tested with 10th generation CPUs, similar findings emerged: the 10900K achieved up to 18% speed boosts from cache alone (in R6S), reinforcing that cache often outweighs core quantity in real-world performance.
Its going to be application dependent since a given instruction that can operate in cache will. So, there's a balancing point on that, since if something need 1MB more cache to operate exclusively in cache, it'll have to use system RAM. 3D v-cache having far more than 5% of an increase, as an example. Also have to consider the fact that Intel's binning scheme will inevitably allow the next tier to be better, since its simply a better bin of the same silicon. That'll allow it to boost higher more frequently, regardless of the cap. Where we'd likely need to see this is comparing the chips with turboboost disabled and at a fixed clock speed to truly test. Its obvious between the 7700x and 7800x3D since there's a 3x the L3 cache in comparison to 3MB between the 14700k and 14900k. I'd also suspect the L2 cache to be A LOT more impactful since its sum is nearly the same as the total L3 cache available to all cores.
Discussing newer CPU lines shows a big jump in L2 and L3 cache sizes since the 10th generation. For instance, the 10900k offers 256KB per core in L2 with 20MB shared L3, whereas the 13900k provides 2MB per core in L2 and 36MB shared L3. The design shift is clear—less L3 loss overall. Also note the 13600k has more L3 than the 10900k. It seems a modest increase like +3MB of L3 might be negligible in some apps compared to larger jumps such as +12MB or +64MB when your system already has 26MB per core. The 10th gen results are solid, but they don’t fully reflect the changes in 13th/14th gen Intel processors. Comparing a 2700x to a 7700x highlights how cache improvements have grown over time.