Kingston 8 GB Kit (2 x 4 GB) 667MHz DDR2 Server Memory KTD-WS667/8G 8GB (2 x 4GB) Fully Buffered Server Memory PC2-5300F 667MHz DDR2 240Pin 2Rx4 1.8volt CL5 This memory will only work in Servers or Larger Workstations. Please check your model specifications before ordering.