CPU cache

A user on Chinese forum Chiphell has shown off AMD's unreleased Ryzen 9 5900X3D, a Zen 3 gaming CPU pairing the Ryzen 9 5900X with 128MB of stacked L3 cache for boosted game performance. The chip never reached retail, and the leak is drawing attention from enthusiasts curious about AMD's cancelled 3D V-Cache plans for the AM4 platform.

Igor Ostrovsky's classic article illustrating processor cache effects through short C# benchmark experiments is drawing renewed attention from programmers. The piece demonstrates how cache lines, cache levels and memory access patterns dramatically affect performance, with examples showing large timing differences from seemingly minor code changes. Developers are revisiting it as a practical, hands-on introduction to why memory locality matters when writing fast software.

A leaked report suggests AMD is preparing a Ryzen 9 5900X3D processor with 128MB of 3D V-Cache, reportedly slated for 2026. The chip would extend AMD's X3D lineup, which stacks extra cache for stronger gaming performance. If accurate, it would bring large-cache designs to another tier of the AM4-era naming scheme, though AMD has not confirmed the product.

A developer has benchmarked matrix multiplication in Intel oneAPI 2026.1 against NumPy with OpenBLAS, running on a Core i7-1195G7 with integrated Iris Xe graphics. Plain DPC++ code ran about twice as fast as NumPy/OpenBLAS at 0.062 seconds versus 0.124, and adding cache optimizations brought the time down to 0.048 seconds, roughly 2.58 times faster. The results suggest Intel's SYCL toolchain can meaningfully outperform the standard CPU BLAS path on supported Intel hardware, even on integrated GPUs.

Intel's upcoming Nova Lake desktop processors are reported to include a 'BFC' variant featuring 144MB of cache, positioning it as a direct competitor to AMD's X3D chips, which use stacked 3D V-Cache for gaming performance. If accurate, the 2026 chip would mark Intel's most aggressive cache play yet against AMD in the high-end gaming CPU market, where X3D parts currently dominate. Details remain sparse, with specs and performance still unconfirmed.

Igor Ostrovsky's article 'Gallery of Processor Cache Effects' is circulating again among developers and hardware enthusiasts. The piece uses small C# experiments to demonstrate how CPU cache lines, cache levels and memory access patterns dramatically affect program performance. It remains a popular reference for anyone learning computer architecture or trying to write faster low-level code.

New benchmarks for The Witcher 3 Remastered show that path tracing places an unusually heavy load on processors, with tests describing the effect as a "CPU killer." AMD's Ryzen X3D chips lead the performance charts, suggesting their large 3D V-Cache gives them a clear edge in the remaster's demanding ray-traced mode.

A rumored specifications table for Intel's next-generation Nova Lake processors lists three chips labeled 'BFC', including a flagship Core Ultra 9 4970K BFC with up to 28 cores and 144MB of L3 cache. The leak suggests Intel's future desktop lineup is taking shape, with enthusiasts and analysts weighing what the cache and core counts mean for performance against AMD.