GeForce GTX 750 vs Radeon HD 4830 512MB

Intro

Compare that to the Radeon HD 4830 512MB, which makes use of a 55 nm design. AMD has clocked the core frequency at 575 MHz. The GDDR3 memory works at a speed of 900 MHz on this specific card. It features 640(128x5) SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 750		55 Watts
Radeon HD 4830 512MB		95 Watts
	Difference: 40 Watts (73%)

Memory Bandwidth

The GeForce GTX 750 should theoretically perform a lot faster than the Radeon HD 4830 512MB overall. (explain)

GeForce GTX 750		80000 MB/sec
Radeon HD 4830 512MB		57600 MB/sec
	Difference: 22400 (39%)

Texel Rate

The GeForce GTX 750 will be a lot (approximately 77%) more effective at texture filtering than the Radeon HD 4830 512MB. (explain)

GeForce GTX 750		32640 Mtexels/sec
Radeon HD 4830 512MB		18400 Mtexels/sec
	Difference: 14240 (77%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 750 is superior to the Radeon HD 4830 512MB, by far. (explain)

GeForce GTX 750		16320 Mpixels/sec
Radeon HD 4830 512MB		9200 Mpixels/sec
	Difference: 7120 (77%)

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: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better 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 are applied in one second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

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