Delltrade branded memory offered in the memory selector is fully compatible and supported by dell memory offered now may differ in speed from the original system memory but has been qualified to work in the system when mixed the memory will perform at the lowest speed populated or the highest speed allowed by the system this product is compatible with the following systems poweredge c1100 poweredge c2100 poweredge c6100 poweredge c6105 poweredge c6145 poweredge c6220 poweredge c8220 power