Need help choosing between these two servers regarding to their performance:
First one, Intel Xeon 3460 with 16 GB DDR3. Second one, Inter Xeon 5620 (Only one CPU) with 12 GIG/ECC Registerd. Both run on RAID10 SATA.
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The main features of these are:
Xeon 3460: Nehalem (Lynnfield 45nm architecture) -4 cores 2.8Ghz Hyperthreading, 1Meg/8Meg L2/L3 cache, two memory controllers capable of running at up to 1333Mhz. IO is DMI @ 2.5GT/sec, TurboBoost is 1/1/4/5.
Xeon 5620 (Gulftown 32nm architecture) - 4 cores 2.2Ghz Hyperthreading, 1Meg/12Meg L2/L3 cache, three memory controllers capable of running at up to 1066Mhz. IO is 2x QPI @ 5.86 GT/sec, TurboBoost is 1/1/2/2.
These feature-sets are too close to make any sensible recommendation between them without knowing the workload. The Lynnfield can use TurboBoost to scale up a single core to 3.4Ghz vs a peak of about 2.4Ghz for the Gulftown and the raw CPU speed difference in this example is high enough that even with the latter's improved architecture I would expect the Lynnfield to outperform for workloads that are specifically CPU bound. Ideally though you should try benchmarking if it matters a lot as per Khaled's comment. There are other important details such as speed of the RAM you are choosing between and how important IO performance is that may make a bigger difference than the CPU speed.