We summarize the x-ray properties of the complete samples of millisecond pulsars ( MSPs ) detected in our Chandra observations of the globular clusters 47 Tuc and NGC 6397 . The 47 Tuc MSPs are predominantly soft sources suggestive of thermal emission from the neutron star polar cap and have x-ray luminosities in a surprisingly narrow range ( L _ { x } \sim 1–4 \times 10 ^ { 30 } erg s ^ { -1 } ) . The single MSP in NGC 6397 is both hard and apparently extended , probably due to shocked hot gas evaporating from its main sequence companion . In contrast to MSPs in the field and the cluster M28 , which show correlation between x-ray luminosity and spindown luminosity L _ { x } \propto \dot { E } ^ { \beta } with \beta \sim 1 - 1.4 , the 47 Tuc ( and NGC 6397 ) sample display a relatively tight correlation with \beta = 0.5 \pm 0.15 . The correlations of L _ { x } vs . P / 2 \dot { P } and light cylinder magnetic field values are also different . It is possible the magnetic field configuration has been altered ( by episodic accretion ) for old MSPs in dense cluster cores .