Ordered two Xeon L5640 processors for my R610, just to see what kind of power saving I could get. One of them came like this ( first photo). Got an replacement today (
Intel Xeon L5640 l5640 12MB 2.26GHz 60W LGA1366 Desktop CPU Processor can work you can order
Intel Xeon L5640 CPU processor /2.26GHz /LGA1366/12MB /L3 Cache/Six-Core/ server CPU Free Shipping,there are, sell L5630 CPU - AliExpress
X58 motherboard LGA1366 set kit with Intel xeon L5640 processor and 8Gb(2pcs*4GB) ECC DDR3 1333mhz 10600R RAM memory - AliExpress