GeForce GTX 950 vs Radeon HD 4830 512MB

Intro

Compare those specifications to the Radeon HD 4830 512MB, which features core speeds of 575 MHz on the GPU, and 900 MHz on the 512 MB of GDDR3 RAM. It features 640(128x5) SPUs along with 32 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 950		90 Watts
Radeon HD 4830 512MB		95 Watts
	Difference: 5 Watts (6%)

Memory Bandwidth

Performance-wise, the GeForce GTX 950 should in theory be much better than the Radeon HD 4830 512MB overall. (explain)

GeForce GTX 950		105728 MB/sec
Radeon HD 4830 512MB		57600 MB/sec
	Difference: 48128 (84%)

Texel Rate

The GeForce GTX 950 should be quite a bit (approximately 167%) faster with regards to anisotropic filtering than the Radeon HD 4830 512MB. (explain)

GeForce GTX 950		49152 Mtexels/sec
Radeon HD 4830 512MB		18400 Mtexels/sec
	Difference: 30752 (167%)

Pixel Rate

The GeForce GTX 950 will be much (more or less 256%) better at AA than the Radeon HD 4830 512MB, and should be able to handle higher screen resolutions better. (explain)

GeForce GTX 950		32768 Mpixels/sec
Radeon HD 4830 512MB		9200 Mpixels/sec
	Difference: 23568 (256%)

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 (in units of MB per second) that can be transported across the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the 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 amount of texture map elements (texels) that are processed in one second. This 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 card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.