M3 Max vs M4 Pro
قراءة جنبًا إلى جنب لـ l3 cache.
فهم l3 cache
CPU cache sits between the cores and main memory (DRAM), buffering data the cores will likely need next.
Hierarchy
- L1 — 32–64 KB per core, ~1 ns access.
- L2 — 512 KB–2 MB per core, ~3 ns.
- L3 — 8–192 MB shared, ~12 ns.
- DRAM — gigabytes, ~80 ns.
Why it matters
A workload that fits in L3 runs 5–10× faster than one that spills to DRAM. AMD's X3D parts (Ryzen 7800X3D, 9800X3D, 9950X3D) stack 64–96 MB of extra cache — the gaming-best CPUs of their generation, frequently 15–25% faster than non-X3D siblings in CPU-bound titles.
Cache vs clock
For gaming, cache often beats raw clock speed. For sustained multithreaded workloads, clocks and core count win.
هذه المواجهةM3 Max's 32MB is roughly 33% higher than M4 Pro's 24MB (a 8MB gap). Whether that gap is noticeable depends on workload — small percentage gaps rarely change day-to-day experience, while gaps of 20% or more usually do.
ما هو cache؟
Small, fast memory inside a CPU that stores recently-used data and instructions. L1 is fastest and smallest; L3 is largest and shared across cores. Cache size meaningfully impacts gaming and database workloads.
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