Will any pci card work in my gateway computer

You might need to upgrade you graphics card.

USB 3.0 is the newest connection port upgrade, arriving on the market in 2010.
The cable port connection is far superior to the USB 2.0 port, as it is able to transport up to 5 gbps (gigabits per second), instead of the previous version's max speed of 480 mbps (megabits per second).

However, most computers do not yet have this connection port installed, in which case you are left to upgrade your own computer system to the newer, faster connection method.

Turn off your computer, then disconnect all of the cables running into the computer.
Remove the Phillips screws from the back side of the computer.

WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL.
http://www.kitchentablecomputers.com/static.php - rules
Only work inside the computer case when the power has been switched off and disconnected. Never open the power source.

Some of the below steps recommend removing physical parts within the computer.
While in the computer it is highly recommend that you be aware of ESD and its potential hazards.

This unlocks the case, allowing you access to the interior of the system.
Slide open the computer case.

Inside the middle is a longer circuit board.
This is the motherboard of the computer.

On the back side of the motherboard, facing the rear of the computer, are PCI card slots.
These allow you to install additional hardware onto the computer.

Slide the USB 3.0 connection port into one of the open PCI card slots, then push down the plastic levers along each side of the slot to lock the card into place.

Close the computer cover, then tighten the Phillips screws and reattach the cables.
Power on the computer, then insert the driver installation CD into the disc drive of the computer.

Once the installation wizard loads, follow the prompts of the wizard to install the drivers.
Restart the computer once finished and the USB 3.0 connection ports are ready for use.
http://www.pcworld.com/article/186566/usb_30_finally_arrives.html
Compatible graphics cards for Gateway Computers

Just as a processor handles data and a sound card outputs sound, your computer's video card is responsible for processing graphics and displaying them on your monitor.

The video cards manufacturers build into computers typically have enough power for the average user, but it may be necessary to upgrade your video card for better performance in games or graphics heavy applications.

Understand which types of video cards are compatible with your Gateway computer and learn about all your options.
PCI Express Graphics Cards

Many newer Gateway computers have a Peripheral Component Interconnect (PCI) Express slot in which you can add any PCI Express compatible video card.

These devices range from budget cards suitable for everyday tasks to high end models for gaming that cost hundreds of dollars.

AGP Graphics Cards

Older Gateway computers likely have an Accelerated Graphics Port (AGP) slot for AGP compatible cards.

The AGP bus provides sufficient bandwidth for high performance graphics cards, but the technology is no longer in use and AGP cards are difficult to find.

PCI Video Cards

Nearly all Gateway computers should have at least one PCI (Peripheral Component Interconnect) slot regardless of age.

This slot has enough bandwidth to support a wide range of peripherals like sound cards and modems, but is not suitable for high end video cards.

You can find a number of low and mid-range cards for PCI slot computers, however.

USB Video Cards

USB video cards are also compatible with Gateway computers sporting USB 2.0 or USB 3.0 ports.

These external cards sit outside the computer and allow you to connect additional monitors to your system.

They are a good option for people who feel uncomfortable working inside computers.
http://www.pcmag.com/article2/0,2817,2371083,00.asp
How to buy a video card

http://support.gateway.com/us/en/support/default.aspx
Gateway Support
Upgrade My Video Card on My Gateway Desktop

Gateway desktops are affordable computers, but they often do not come with top-of-the-line video cards.
Computer games may run slowly or not at all on your Gateway desktop.

One way to solve this problem is to upgrade the video card.
Video cards come in PCI, PCI-E and AGP interfaces, so you should be able to find a video card upgrade no matter what Gateway desktop model you have.

Click "Start" and right-click "My Computer."
Select "Properties" from the menu that appears.

Go to the "Hardware" tab.
Choose "Device Manager."

Click the plus sign next to the Device Manager entry listed "Display Adapters."
Find your graphics card in this list.

Double-click it.
Go to the "Drivers" tab and click "Uninstall Drivers."

Click "OK" to confirm the uninstallation process.
Shut your Gateway desktop down.

Pull the power cable out of the back.
Look at the back of the Gateway computer tower for screws on the right side panel or on top of the case for a cover release handle.

You won't ba able to fit a video card in this computer. Because it is a all-in-one PC.

Ummmm, no.

The old Gateway 300X desktop computer has only white PCI slots, to install a graphics card in.

http://pcworld.about.net/news/Jan082003id108534.htm

More info on PCI technology,

http://en.wikipedia.org/wiki/PCI_local_bus

The ATI Radeon HD5450 (No matter who remakes it. VisionTek, Sapphire, etc) uses a PCI-Express x16 slot, on the motherboard,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=6671719&CatId=3670

More information on the PCI-Express technology,

http://en.wikipedia.org/wiki/PCI-Express

From the link above's info on the Gateway 300X, it uses an Intel Pentium 4 at 1.8GHz, and uses old SIMM ram memory. (Single Inline Memory Module)

Not EVEN a gamer computer for today's games, no matter how you upgrade the graphics card.
(Not trying to be harsh, just telling it like it is)

For additional questions please post in a Comment.

Regards,
joecoolvette

(If you want to upgrade the graphics, use a PCI graphics card, IF there is any open, available PCI slot on the motherboard.

A) BEFORE you install the graphics card, stick that CD that came with the graphics card, into the optical drive. (CD/DVD drive) F-I-R-S-T.
Load the software on the disk.

B) Now turn the computer off normally, then unplug it from power.
Observe Anti-Static Precautions.

Anti-Static Precautions:

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

1) Work on a table. DO NOT work on a bed, couch, or directly on a carpet floor. These are HIGH areas of Static.

2) Computer unplugged from power, computer case open.
TOUCH the metal frame (Unpainted surface) of the open computer case.
This action will relieve your body of Static.

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

C) Install the graphics card into the computer. Close the computer case, plug into power.
WAIT 1 minute, turn the computer on.
{Don't forget. You have to plug the monitor cable into the graphics card now, not into the computer's I/O area }

Based on the motherboard photo at http://support.gateway.com/s/MOTHERBD/Intel2/2522213/2522213nv.shtml, the Gateway e2300 can accept PCI video cards (NOT PCI-e or AGP).

If your motherboard looks like that photo - buy any PCI video card and it should work.

There have been several varients of buss slots over the years from Vesa to ISA8bit ISA16bit EISA 32bit and PCI32 and PCI64 and more recently the PCIE and PCIE16 bus slots.
at a guess I would say that the card yrom your old gateway is a VESA or ISA16 card and the newer gateway is a PCI
the way to Identify an ISA card is to look at the edge connector that plugs into the motherboard, the ISA 8bit will have 31 sections to it the 16bit varient than has an aditional 18 connects on a sepparate section. this connection is much lager than the PCI bus slot even though PCI has over 50 connectors. VESA cards are lager again and have 3 sections to their edge connectors - the boards are not interchangeable.

No you cant, the gateway GX7018E uses integrated graphics like the T6420. You will have to buy a cheap PCI or PCI-E graphics card to test it out. 

The Pci Slots and Pci cards are standered and will work with any Pci Device. You can also use a usb Sound Card .

1. open your cabinet.
2. remove the battery form the motherboard.
3. wait 15 seconds and then replace the battery again.
4. connect your screen to the pci ex card.

now it should work.
CS

Yes, your computer specifically supports:

PCI Express 16x and
PCI Express 1x

The 16x is the long one and the 1x is the reallly short one. Most likely the card that you get will fit the big slot. Be careful not to upgrade too high though, because if you do you may have to upgrade your power supply as well. Ask someone at gateway or a local shop for a recommended card for your system.

1600 × 1200 32-bit color is the maximum resolutions of u're video card. And the native resolution of the monitors is the highest resolution supported by them, so there is no worry, u can use the video card u have ... !

http://support.gateway.com/s/VIDCARD/VisionTEk/6002239/6002239sp3.shtml