X4

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X4

(1) (Times 4) x4 may refer to a PCI Express (PCIe) interface with 4 lanes. See PCI Express.

(2) (Phenom X4) A quad-core processor from AMD. See Phenom.
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References in periodicals archive ?
Astronomers have now found several objects that do, including the Crab nebula, the Crab pulsar, the Vela pulsar, Hercules X-1, Cygnus X-3, 4U0115 63, Centaurus X-3, PSR1953 29 and LMC X-4. All but PSR1953 29 are known X-ray sources.