Golden Cove + Gracemont microarchitecture (12th generation) " Alder Lake-HX" (Intel 7) Core i5-520E has support for ECC memory and PCI express port bifurcation.Graphics and Integrated Memory Controller die size: 114 mm².
All models support: MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, Enhanced Intel SpeedStep Technology (EIST), Intel 64, XD bit (an NX bit implementation), Intel VT-x, Hyper-threading, Turbo Boost, Smart Cache. Mobile processors Westmere microarchitecture (1st generation) " Arrandale" ( MCP, 32 nm) All models support up to DDR5-5600 or DDR4-3200 memory, and 16 lanes of PCI Express 5.0 + 4 lanes of PCIe 4.0. All models support: SSE4.1, SSE4.2, AVX, AVX2, FMA3, Enhanced Intel SpeedStep Technology (EIST), Intel 64, XD bit (an NX bit implementation), Intel VT-x, Intel VT-d, Hyper-threading, Turbo Boost 2.0, AES-NI, Smart Cache, Thread Director, DL Boost, and GNA 3.0. Raptor Cove + Gracemont microarchitecture (13th generation) " Raptor Lake" (Intel 7) Overclocking: Unlocked multiplier on K and KF models. All models support up to DDR5-4800 or DDR4-3200 memory, and 16 lanes of PCI Express 5.0 + 4 lanes of PCIe 4.0. All models support: SSE4.1, SSE4.2, AVX, AVX2, FMA3, Enhanced Intel SpeedStep Technology (EIST), Intel 64, XD bit (an NX bit implementation), Intel VT-x, Intel VT-d, Hyper-threading, Turbo Boost 2.0, AES-NI, SHA, Smart Cache, Thread Director, DL Boost, GNA 3.0, and Optanememory. Golden Cove + Gracemont microarchitecture (12th generation) " Alder Lake" (Intel 7) Non-K processors have limited turbo overclocking (extra 4 turbo bins). P processors disable the integrated graphics processor. K processors have unlocked turbo multiplier. 
T processors feature an even lower TDP (45 W on 4-core models).S processors feature lower-than-normal TDP (65 W on 4-core models).All models support dual-channel DDR3-1666 RAM.All models support: MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, Enhanced Intel SpeedStep Technology (EIST), Intel 64, XD bit (an NX bit implementation), Intel VT-x, Turbo Boost, AES-NI, Smart Cache, Intel Insider.
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