SNP8WKDYC/32G DELL MODULO DE MEMORIA 32GB DDR4 2933MHz PC4-23400 ECC 1.2V 288 PINOS CL21 RDIMM POWEREDGE C4140 C6420 FC640 M640 M640 VRTX MX740C MX840C R640 R740 R740XD A579531 SNP8WKDYC/32G