GeForce GT 220 GDDR3 vs Radeon R7 250X 2GB

Intro

Compare that to the Radeon R7 250X 2GB, which has a core clock speed of 1000 MHz and a GDDR5 memory frequency of 1125 MHz. It also makes use of a 128-bit memory bus, and makes use of a 28 nm design. It features 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3		58 Watts
Radeon R7 250X 2GB		95 Watts
	Difference: 37 Watts (64%)

Memory Bandwidth

Theoretically, the Radeon R7 250X 2GB should perform quite a bit faster than the GeForce GT 220 GDDR3 overall. (explain)

Radeon R7 250X 2GB		72000 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 39616 (122%)

Texel Rate

The Radeon R7 250X 2GB is a lot (about 300%) better at AF than the GeForce GT 220 GDDR3. (explain)

Radeon R7 250X 2GB		40000 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 30000 (300%)

Pixel Rate

The Radeon R7 250X 2GB is a lot (approximately 220%) better at full screen anti-aliasing than the GeForce GT 220 GDDR3, and will be capable of handling higher resolutions better. (explain)

Radeon R7 250X 2GB		16000 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 11000 (220%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the max amount of information (in units of megabytes per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.