GeForce GTS 150 vs Geforce GTX 770

Intro

Compare those specs to the Geforce GTX 770, which comes with core clock speeds of 1046 MHz on the GPU, and 1753 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs along with 128 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 150		141 Watts
Geforce GTX 770		230 Watts
	Difference: 89 Watts (63%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 770 is 601% quicker than the GeForce GTS 150 in general, because of its greater bandwidth. (explain)

Geforce GTX 770		224384 MB/sec
GeForce GTS 150		32000 MB/sec
	Difference: 192384 (601%)

Texel Rate

The Geforce GTX 770 should be much (about 183%) faster with regards to anisotropic filtering than the GeForce GTS 150. (explain)

Geforce GTX 770		133888 Mtexels/sec
GeForce GTS 150		47360 Mtexels/sec
	Difference: 86528 (183%)

Pixel Rate

If using a high screen resolution is important to you, then the Geforce GTX 770 is a better choice, and very much so. (explain)

Geforce GTX 770		33472 Mpixels/sec
GeForce GTS 150		11840 Mpixels/sec
	Difference: 21632 (183%)

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 data (in units of MB per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, 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 is calculated 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 processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.