GeForce GTX 260 216SP 55 nm vs GeForce GTX 470

Intro

Compare that to the GeForce GTX 470, which features GPU clock speed of 607 MHz, and 1280 MB of GDDR5 RAM running at 837 MHz through a 320-bit bus. It also is comprised of 448 Stream Processors, 56 TAUs, and 40 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 260 216SP 55 nm		171 Watts
GeForce GTX 470		215 Watts
	Difference: 44 Watts (26%)

Memory Bandwidth

Performance-wise, the GeForce GTX 470 should in theory be a small bit better than the GeForce GTX 260 216SP 55 nm in general. (explain)

GeForce GTX 470		133920 MB/sec
GeForce GTX 260 216SP 55 nm		111888 MB/sec
	Difference: 22032 (20%)

Texel Rate

The GeForce GTX 260 216SP 55 nm will be a lot (more or less 22%) faster with regards to anisotropic filtering than the GeForce GTX 470. (explain)

GeForce GTX 260 216SP 55 nm		41472 Mtexels/sec
GeForce GTX 470		33992 Mtexels/sec
	Difference: 7480 (22%)

Pixel Rate

The GeForce GTX 470 will be a lot (approximately 51%) more effective at AA than the GeForce GTX 260 216SP 55 nm, and also should be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 470		24280 Mpixels/sec
GeForce GTX 260 216SP 55 nm		16128 Mpixels/sec
	Difference: 8152 (51%)

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 (measured in megabytes per second) that can be transferred over the external memory interface in one second. It's worked out by multiplying the bus width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.