GeForce GT 1030 vs GeForce GT 420

Intro

Compare those specifications to the GeForce GT 420, which has core speeds of 700 MHz on the GPU, and 900 MHz on the 2048 MB of GDDR3 memory. It features 48 SPUs as well as 8 Texture Address Units and 4 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 1030		30 Watts
GeForce GT 420		50 Watts
	Difference: 20 Watts (67%)

Memory Bandwidth

The GeForce GT 1030 should theoretically perform quite a bit faster than the GeForce GT 420 overall. (explain)

GeForce GT 1030		49152 MB/sec
GeForce GT 420		28800 MB/sec
	Difference: 20352 (71%)

Texel Rate

The GeForce GT 1030 is quite a bit (about 623%) better at AF than the GeForce GT 420. (explain)

GeForce GT 1030		40480 Mtexels/sec
GeForce GT 420		5600 Mtexels/sec
	Difference: 34880 (623%)

Pixel Rate

The GeForce GT 1030 will be a lot (approximately 623%) more effective at anti-aliasing than the GeForce GT 420, and able to handle higher resolutions better. (explain)

GeForce GT 1030		20240 Mpixels/sec
GeForce GT 420		2800 Mpixels/sec
	Difference: 17440 (623%)

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 data (in units of MB per second) that can be transported past the external memory interface in a second. The number is worked out by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster 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 texture map elements (texels) that are applied per second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the 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 most pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.