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Tom’s Hardware
Tom’s Hardware
Technology
Zhiye Liu

Expansion card lets you insert 512GB of extra DDR5 memory into your PCIe slot — CXL 2.0 AIC designed for TRX50 and W790 workstation motherboards

AI Top CXL R5X4.

Workstation motherboards already have access to an immense amount of memory. However, additional memory can often be beneficial. Gigabyte has introduced the AI Top CXL R5X4, a specialized add-in card (AIC) designed to further increase the memory capacity of the company's TRX50 AI Top and W790 AI Top motherboards.

The AI Top CXL R5X4 may initially be mistaken for an entry-level gaming graphics card if you don't catch the presence of the memory slots. It is because the AIC, which measures 4.7 x 10 inches (12 x 25.4 cm), slots into a regular PCIe 5.0 x16 expansion slot. The AI Top CXL R5X4, which features a 16-layer HDI PCB, is based around the Microchip PM8712 controller cooled with what Gigabyte calls the "CXL Thermal Armor," a solution manufactured with a full-metal thermal design. It also includes an AIO fan for active cooling, which expels air from the shroud to cool the nearby memory slots.

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