GeForce GTX 295 vs Radeon R9 Nano

Intro

Compare those specs to the Radeon R9 Nano, which features a clock frequency of 1000 MHz and a HBM memory speed of 500 MHz. It also uses a 4096-bit bus, and uses a 28 nm design. It is made up of 4096 SPUs, 256 Texture Address Units, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 Nano		175 Watts
GeForce GTX 295		289 Watts
	Difference: 114 Watts (65%)

Memory Bandwidth

The Radeon R9 Nano should theoretically perform much faster than the GeForce GTX 295 overall. (explain)

Radeon R9 Nano		512000 MB/sec
GeForce GTX 295		223776 MB/sec
	Difference: 288224 (129%)

Texel Rate

The Radeon R9 Nano will be much (approximately 178%) better at texture filtering than the GeForce GTX 295. (explain)

Radeon R9 Nano		256000 Mtexels/sec
GeForce GTX 295		92160 Mtexels/sec
	Difference: 163840 (178%)

Pixel Rate

The Radeon R9 Nano will be quite a bit (about 98%) faster with regards to anti-aliasing than the GeForce GTX 295, and will be able to handle higher resolutions better. (explain)

Radeon R9 Nano		64000 Mpixels/sec
GeForce GTX 295		32256 Mpixels/sec
	Difference: 31744 (98%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the max amount of data (measured in MB per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the interface width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the video 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 maximum number of pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines 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 also depends on lots of 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.