GeForce GT 310 vs Radeon HD 7770

Intro

Compare those specifications to the Radeon HD 7770, which comes with a clock frequency of 1000 MHz and a GDDR5 memory frequency of 1125 MHz. It also uses a 128-bit bus, and uses a 28 nm design. It is made up of 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 310		31 Watts
Radeon HD 7770		80 Watts
	Difference: 49 Watts (158%)

Memory Bandwidth

The Radeon HD 7770 should theoretically perform a lot faster than the GeForce GT 310 overall. (explain)

Radeon HD 7770		72000 MB/sec
GeForce GT 310		16000 MB/sec
	Difference: 56000 (350%)

Texel Rate

The Radeon HD 7770 will be much (approximately 749%) faster with regards to anisotropic filtering than the GeForce GT 310. (explain)

Radeon HD 7770		40000 Mtexels/sec
GeForce GT 310		4712 Mtexels/sec
	Difference: 35288 (749%)

Pixel Rate

The Radeon HD 7770 should be a lot (approximately 579%) more effective at anti-aliasing than the GeForce GT 310, and should be able to handle higher resolutions better. (explain)

Radeon HD 7770		16000 Mpixels/sec
GeForce GT 310		2356 Mpixels/sec
	Difference: 13644 (579%)

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 max amount of data (measured in MB per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, 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 could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.