8GB KIT (2 x 4GB) For HP-Compaq HP Touchsmart Desktop IQ542af IQ542fr IQ542uk IQ543hk IQ545 IQ545a IQ545uk IQ546t IQ548 IQ548hk IQ820fr IQ820sc IQ820uk IQ826t IQ828hk IQ830 IQ830it IQ830uk IQ838hk IQ840 IQ842 IQ842fr IQ843hk IQ844jp IQ845 IQ845uk IQ846 IQ846t IQ848cn IQ848hk. SO-DIMM DDR2 NON-ECC PC2-6400 800MHz RAM Memory. Genuine A-Tech Brand. 8GB KIT (2 x 4GB) SO-DIMM DDR2 NON-ECC PC2-6400 800MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For HP-Compaq HP Touchsmart Desktop. (See Compatibility List Below)