Xeon E5530 's Advantages
Higher specification of memory (1066 vs 3)
Lower TDP (80W vs 95W)
Intel Xeon E3 1290 's Advantages
Released 2 years and 2 months late
Newer PCIe version (3 vs 2)
Higher base frequency (3.6GHz vs 2.4GHz)
More modern manufacturing process (32nm vs 45nm)