need advice on video card replacement -- current is Nvidia GT 620

DDR5 and getting better than a 64 bit interface are the major things to think about. You have the PCIe slot in your PC, so no worries there.

You might do well with something in the Nvidia 1060 series, assuming that it isn't too large for your case. They are a little over your budget at $200 to $299, but are worth the money.

An alternative which will be cheaper is something in the Radeon R9 or RX series. Here's an example that isn't too bad:

XFX Radeon RX 470 RS Black Edition True OC DirectX 12 RX-470P437BM 4GB 256-Bit GDDR5 PCI Express 3.0 CrossFireX Support Video Card-Newegg.com

I've had great luck with XFX cards. They're solid performers.

You aren't going to get big benchmarks out of either of these two cards, but they will do the job adequately, and play games at reasonable settings and frame rates.

Bigger bus width isn't always better. Faster double data rate also helps a GPU to render faster.

RoasterMen said:

Bigger bus width isn't always better. Faster double data rate also helps a GPU to render faster.

While that is true in principle, you have to admit that you'll get better throughput out of a 256 bit data bus than a 64 bit data bus.

Hi,
ddr5 of course :)

EVGA has several 1060's in your price range though but yes if it doesn't fit you must acquit
400w psu so you're good there,
EVGA - Products - Graphics - GeForce 10 Series Family - GTX 1060 3GB

Hi,
Use this tutorial
System Info - See Your System Specs

Don't forget to use the auto upload feature by making ie11 your default browser temporarily till it's done.

Also use cpuid/ cpu-z and post the mother board or I believe Main board section screen shot
CPU-Z | Softwares | CPUID

Here is the screen shot of the mainboard.
I don't see how this tells me, but I hope that you can.

Some of the newer cards want PCI 3. Can you tell if my system can use that or if I need to stick with PCI Express 2.0 x16 ?

Hi,
Actually it's PCI-E for express not PCI-3 and yes your good :)
You can if you want open the side of the case
Grab a stick ruler set it on the bottom and take a picture and post it here so we can tell how much room there is in the case.
EVGA - Product Specs - EVGA GeForce GTX 1060 GAMING, 03G-P4-5160-KR, 3GB GDDR5

Dimensions

• Height: 4.376in - 111.15mm
• Length: 10.5in - 266.7mm
• Width: Dual Slot

Requirements

• 400 Watt or greater power supply.****
• PCI Express, PCI Express 2.0 or PCI Express 3.0 compliant motherboard with one graphics slot.
• An available 6-pin PCI-E power connector
• Windows 10 32/64bit, Windows 8 32/64bit, Windows 7 32/64bit