24GB (6 x 4GB) DDR3-1600 MHz PC3-12800R ECC Registered Server Memory Upgrade Kit - Asus MTA9ASF2G72HZ-3G2 Compatible With: IBM System x3100

Compatible With: IBM System x3100 M4

Depending on what R6525 chassis you have

Included in the Verification Kit:

and unfiltered Halogen HPX on a 3-position switch -- each position can be engaged with each of the 6 positions of the aperture dial

and data acquisition applications

24GB (6 x 4GB) DDR3-1600 MHz PC3-12800R ECC Registered Server Memory Upgrade Kit - Asus MTA9ASF2G72HZ-3G2 Compatible With: IBM System x3100Product Details Module Name: PC3 12800R Speed: 1600 MHz Data Integrity Check: ECC Kit Storage Capacity: 24GB (6 x 4GB) Condition: Fully Tested, Refurbished Warranty: 1 Year Warranty DL165 G7, DL560 G8, DL585 G7, ML350P G8, DL360P G8, DL380P G8, DL385P G8, ML350E G8 V2, DL360E G8, DL380E G8, BL420C G8, SL4540 G8, Z620