GeForce GTX 280 vs Geforce GTX 770

Intro

Compare all that to the Geforce GTX 770, which has a core clock frequency of 1046 MHz and a GDDR5 memory speed of 1753 MHz. It also uses a 256-bit bus, and makes use of a 28 nm design. It is made up of 1536 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 770		230 Watts
GeForce GTX 280		236 Watts
	Difference: 6 Watts (3%)

Memory Bandwidth

In theory, the Geforce GTX 770 will be 58% faster than the GeForce GTX 280 overall, due to its higher bandwidth. (explain)

Geforce GTX 770		224384 MB/sec
GeForce GTX 280		141696 MB/sec
	Difference: 82688 (58%)

Texel Rate

The Geforce GTX 770 is much (approximately 178%) faster with regards to texture filtering than the GeForce GTX 280. (explain)

Geforce GTX 770		133888 Mtexels/sec
GeForce GTX 280		48160 Mtexels/sec
	Difference: 85728 (178%)

Pixel Rate

The Geforce GTX 770 should be much (about 74%) faster with regards to FSAA than the GeForce GTX 280, and also will be capable of handling higher screen resolutions without losing too much performance. (explain)

Geforce GTX 770		33472 Mpixels/sec
GeForce GTX 280		19264 Mpixels/sec
	Difference: 14208 (74%)

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 (measured in MB per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 texture map elements (texels) that are processed per second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The better 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 most pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.