GeForce 9500 GT 1GB GDDR3 vs Radeon RX 580

Intro

Compare that to the Radeon RX 580, which comes with a core clock speed of 1257 MHz and a GDDR5 memory frequency of 2000 MHz. It also features a 256-bit memory bus, and makes use of a 14 nm design. It features 2304 SPUs, 144 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9500 GT 1GB GDDR3		50 Watts
Radeon RX 580		185 Watts
	Difference: 135 Watts (270%)

Memory Bandwidth

In theory, the Radeon RX 580 should be 924% quicker than the GeForce 9500 GT 1GB GDDR3 overall, because of its greater bandwidth. (explain)

Radeon RX 580		262144 MB/sec
GeForce 9500 GT 1GB GDDR3		25600 MB/sec
	Difference: 236544 (924%)

Texel Rate

The Radeon RX 580 will be a lot (approximately 1957%) more effective at texture filtering than the GeForce 9500 GT 1GB GDDR3. (explain)

Radeon RX 580		181008 Mtexels/sec
GeForce 9500 GT 1GB GDDR3		8800 Mtexels/sec
	Difference: 172208 (1957%)

Pixel Rate

The Radeon RX 580 will be much (about 814%) better at full screen anti-aliasing than the GeForce 9500 GT 1GB GDDR3, and also capable of handling higher resolutions without slowing down too much. (explain)

Radeon RX 580		40224 Mpixels/sec
GeForce 9500 GT 1GB GDDR3		4400 Mpixels/sec
	Difference: 35824 (814%)

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 largest amount of information (measured in megabytes per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.