1GB DDR2 Memory for HP Compaq Business Desktop dc5700 dc5800 dc5850 dc7700 dc7800 dc7900 dx1000 dx2310 dx2355 dx2358 dx2390 dx2400 dx2420 dx2450 dx2480 dx2700 dx2710 dx2718 dx2810 dx7300 dx7380 dx7400 dx7500 PC2-6400 240 pin 800MHz NON-ECC DIMM RAM (PARTS-QUICK BRAND). Equivalent to 418951-001, AH058AA Speed: PC2 6400 800MHz Form Factor: 240 pin DIMM Capacity: 1GB Warranty: Lifetime