Capacity:32GB (8x4GB) 667Mhz HS 32GB Kit (8x4GB) PC2-5300 DDR2 ECC Fully Buffered Server Memory PC2-5300F (667MHz) DDR2 240 Pin FBDIMM memory upgrade ECC Fully buffered includes Heatspreaders Designed for DELL Servers and Workstations: Dell PowerEdge 1900 1950 1950 III 1955 2900 2900 III 2950 2950 III M600 R900 SC1430 T110 PowerVault NF500 NF600 NX1950 Workstation 690 (750W Chassis) Precision Workstation 490 Precision Workstation 690 (1KW Chassis) 690n (1KW Chassis) and (750W Chassis) R5400 64bit R5400 N-Series T5400 T7400 Studio Hybrid 140G. Will also work with many other brands and models. Associated Equivalent OEM Part Numbers: DELL: A2146192, A2257179, A2257184, A2257233 KINGSTON: KTH-XW667/64G, KTM5780/4G, KTM5780/8G, KTM5780/16G, KVR667D2D4F5/2G, KVR667D2D4F5/8G, KVR667D2D4F5/4G, KTD-WS667/64G CRUCIAL: CT25672AF667, CT51272AF667, CT102472AF667 MemoryMasters is quickly becoming one of the most trusted names in computer memory. We provide superior customer service and a for all MemoryMasters brand items! MemoryMasters memory is the simplest and most affordable way to upgrade your computer and improve performance. Your computer will achieve faster loading times, faster multitasking, and increased speed in handling data-intensive programs. Every MemoryMasters RAM module is thoroughly tested to ensure that it meets our performance standards before it leaves our doors.