GeForce GTX 275 vs Geforce GTX 770

Intro

Compare those specs to the Geforce GTX 770, which uses a 28 nm design. nVidia has set the core frequency at 1046 MHz. The GDDR5 memory runs at a speed of 1753 MHz on this specific card. It features 1536 SPUs along with 128 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 275		219 Watts
Geforce GTX 770		230 Watts
	Difference: 11 Watts (5%)

Memory Bandwidth

In theory, the Geforce GTX 770 is 77% quicker than the GeForce GTX 275 in general, due to its greater bandwidth. (explain)

Geforce GTX 770		224384 MB/sec
GeForce GTX 275		127008 MB/sec
	Difference: 97376 (77%)

Texel Rate

The Geforce GTX 770 is much (approximately 164%) more effective at anisotropic filtering than the GeForce GTX 275. (explain)

Geforce GTX 770		133888 Mtexels/sec
GeForce GTX 275		50640 Mtexels/sec
	Difference: 83248 (164%)

Pixel Rate

If using a high resolution is important to you, then the Geforce GTX 770 is a better choice, by far. (explain)

Geforce GTX 770		33472 Mpixels/sec
GeForce GTX 275		17724 Mpixels/sec
	Difference: 15748 (89%)

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 maximum amount of data (in units of MB per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.