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Only with Asus' unique 3D card with SSD slot
Recently, Asis introduced an unusual Dual RTX 4060 Ti video card with an SSD slot. It turned out that something even stranger could be made from this device. For example, connect another one to this video card.
Asus itself showed how you can connect another video card to such an RTX 4060 Ti using the same M.2 SSD slot. And for greater effect, the company used the RTX 4090, which is many times more powerful than the RTX 4060 Ti.
Let us remember that the M.2 slot is technically PCIe, just in a different design. So, using a special adapter, you can also connect a 3D card to it.
Of course, in reality there are no clear scenarios for connecting a second video card in this way, but to attract additional attention this is a very original move.