We have installed two high memory DELL R820 servers into the 800 series. 
Each server has four sockets with six cores of 2.4GHz each. There are also thirty two 32GB DIMMS making up 1TB of RAM, although these memory chips are only 1066MHz. Access to these servers will be granted only if researchers can demonstrate a specific need for large amounts of RAM.
Below is the LINPACK test on one of these servers:
Performance Summary (GFlops) Size LDA Align. Average Maximal 1000 1000 4 34.7709 39.3734 2000 2000 4 166.7356 171.7181 5000 5008 4 250.4138 253.7283 10000 10000 4 328.0672 329.2398 15000 15000 4 365.0112 365.5601 18000 18008 4 364.3244 364.3453 20000 20016 4 359.0576 359.3760 22000 22008 4 361.1715 361.1797 25000 25000 4 373.1793 373.6518 26000 26000 4 380.6259 380.6809 27000 27000 4 381.6859 381.6859 30000 30000 1 391.6614 391.6614 35000 35000 1 393.0516 393.0516 40000 40000 1 428.8028 428.8028 45000 45000 1 426.5461 426.5461
The power consumption during the test peaked at 280W which gives an average of 1.52GF/W, which is fairly efficient. If we could sustain this throughout our cluster this would place us at roughly number 112 on the current Green500 list.