GeForce GTX 650 vs Radeon HD 5830

Intro

Compare those specs to the Radeon HD 5830, which makes use of a 40 nm design. AMD has set the core speed at 800 MHz. The GDDR5 memory works at a speed of 1000 MHz on this specific model. It features 1120(224x5) SPUs along with 56 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
Radeon HD 5830		175 Watts
	Difference: 111 Watts (173%)

Memory Bandwidth

Performance-wise, the Radeon HD 5830 should in theory be much superior to the GeForce GTX 650 overall. (explain)

Radeon HD 5830		128000 MB/sec
GeForce GTX 650		80000 MB/sec
	Difference: 48000 (60%)

Texel Rate

The Radeon HD 5830 is a lot (about 32%) better at AF than the GeForce GTX 650. (explain)

Radeon HD 5830		44800 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 10944 (32%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 650 is the winner, by far. (explain)

GeForce GTX 650		16928 Mpixels/sec
Radeon HD 5830		12800 Mpixels/sec
	Difference: 4128 (32%)

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 maximum amount of information (in units of MB per second) that can be moved past the external memory interface in a second. It's calculated by multiplying the interface width by its memory speed. If the card has DDR RAM, it must 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, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total texture units by the core 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 applied in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.