I tried to update the display driver by installing the catalyst driver, updated the BIOS, and finally installed two exact rams Kingston, 1GB 1RX8 PC2-4200U DDR2 533. I still get the same result, the system will recognize only 1 GB. I am wondering if this issue has to do with a windows xp limitation. Thanks to everyone for their help Alex
Thank you guys for the responses. I will try your recommendations and report back. By the way both ram are PC4200U, one sided and running windows xp. But it's interested the same issue was reported before in the same computer model.
Have an HP Pavillion a1320n Desktop with 1 GB PC4200 (micron) installed ram. I decided to install a second 1 GB Kingston PC4200 to improve computer performance. The maximum ram the system handles is 2GB with two available ram slots. However, in control panel, system and in BIOS, it only shows 1GB ram. The new and the old 1 GB will work in either slots but with both installed, I will only get 1 GB ram. I tried to update the BIOS but still have the issue.
Stardock Forums