Upon physical installation of an N7600/HDT/256M

http://support.dell.com/support/edocs/systems/opgx260/en/sm/index.htm

Computer Cover

Depending on what model you have, you may have 1 PCI expansion slot, or up to 4 PCI expansion slots.

Small Form Factor computer (SFF) = 1 PCI slot
Small Desktop computer = 2 PCI slots
Small Mini-Tower computer = 4 PCI slots

http://support.dell.com/support/edocs/systems/opgx260/en/ug/specs.htm

You need an open available PCI slot, and may not have one with the Small Form Factor computer, or Small Desktop computer.

2) The Sound Card needs to be a Low Profile one.
Maximum size depends on what model it is.

3) Computer on, and Windows running, install the sound card's Installation Disk (CD) in the optical drive of the computer, and load the software.

After the drivers, and if you also chose the effects manager, are installed; close all windows, and go back to your desktop screen.
Turn your computer off normally.

{Your computer will not use the sound card drivers, until the Sound Card is physically installed }


4) FOLLOW Anti-Static Precautions, with your Unplugged from power computer, and open the computer case.

Anti-Static Precautions:
Your body carries Static electricity. Static WILL fry out (Short Circuit), the delicate hardware components inside a computer.

Relieve your body of Static BEFORE working on your computer.

Computer on a table, computer unplugged from power, computer case open;
TOUCH an unpainted surface, of the metal frame of the open computer case.
This action will relieve your body of Static.

IF you leave your computer in the middle of working on it, be SURE to Touch the metal frame again upon your return.

http://support.dell.com/support/edocs/systems/opgx260/en/sm/cover.htm#1099393

5) Physically install the Sound Card.

Find an open PCI slot, and remove the expansion slot cover from the metal frame of the computer case, that matches up to this PCI slot.
(Note the PCI slot will not be directly in line, with the expansion slot cover. It is 'one over' )

http://support.dell.com/support/edocs/systems/opgx260/en/sm/cards.htm#1104768

6) Attach your audio cables to the Sound Card. Plug the computer into power. WAIT 1 minute, turn the computer on.

Go to the system task bar at the bottom of the desktop screen, and click on the Volume icon. (Looks like a speaker)
Set the Volume where you wish.
(Also you may want to Right-click on the Volume icon, and make sure your audio { Sound }, is Enabled )

If you do not have the Installation Disk with the needed software on it, go to the Sound Card's support website, and download the software.
Post the manufacturer name of the Sound Card, and it's model number, and I'll guide you with the above.

For additional questions post in a Comment.

Regards,
joecoolvette

Try taking the video card out and replacing it back...making sure that it is properly seated...if you can obtain another video card...try replacing the video card...this will rule out the motherboard if it works.

Clean Windows Registry :
Defragment your PC to increase computer speed: Clear Cache, history and temporary internet files
Turn off unnecessary programs from start up:
Have low intensity graphics
Uninstall unused software and programs Please remember to clean Windows registry using registry cleaner reg in out The above guidelines were really helpful to speed up my computer. These are safe and do impact computer performance in a positive way.

For the Dell Optiplex GX270, you will utilize the Windows operating system default optical driver files.

Just physically connect your device and reboot your machine, the OS will pickup and automaticlly configure your device.

Use Process Explorer to see what is running but it's probably a memory issue like bad RAM or bad mainboard or mainboard settings.

Repaire the pc or reinstall the operating system, your pc will work well again

Good day Sir, hope this will help you first unplugged your cables and insert it into pci-e slot and install the driver and try to delete the older drivers for the onboard video. Also try to view the link below.

asus customer review

Bumili po kase ng bagong cd ng hdt karaoke. Kaya lang yung mga bagong kanta ayaw tumunog pero yung mic gumagana naman.. Wala talaga sound yung kanta

Are ou adding them along with the 256MB memory? That could be the problem

Yes, you can add more - But if you have a fragmented HDD, it won't help much. Before you spend money on physical memory, I would do a disk defrag, check to make sure your HDD is not getting too full, and check your virtual memory. On xp you can get to this by right clicking MY COMPUTER, click properties, Performance, Paging file. XP has a problem during install of not setting this right. Change it to "system managed size", apply & ok, reboot your computer. If this doesn't help, and your HDD is not too full, stop some of the things that are loading up on startup.