GeForce GT 1030 vs GeForce GTX 650

Intro

Compare those specifications to the GeForce GTX 650, which comes with a clock frequency of 1058 MHz and a GDDR5 memory speed of 1250 MHz. It also features a 128-bit bus, and uses a 28 nm design. It is made up of 384 SPUs, 32 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 1030		30 Watts
GeForce GTX 650		64 Watts
	Difference: 34 Watts (113%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 650 is 63% faster than the GeForce GT 1030 in general, because of its greater bandwidth. (explain)

GeForce GTX 650		80000 MB/sec
GeForce GT 1030		49152 MB/sec
	Difference: 30848 (63%)

Texel Rate

The GeForce GT 1030 is a small bit (approximately 20%) more effective at anisotropic filtering than the GeForce GTX 650. (explain)

GeForce GT 1030		40480 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 6624 (20%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GT 1030 is a better choice, though only just barely. (explain)

GeForce GT 1030		20240 Mpixels/sec
GeForce GTX 650		16928 Mpixels/sec
	Difference: 3312 (20%)

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 maximum amount of information (in units of MB per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.