GeForce GTS 150 vs GeForce GTX 650

Intro

Compare all that to the GeForce GTX 650, which uses a 28 nm design. nVidia has clocked the core speed at 1058 MHz. The GDDR5 memory is set to run at a speed of 1250 MHz on this specific card. It features 384 SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
GeForce GTS 150		141 Watts
	Difference: 77 Watts (120%)

Memory Bandwidth

In theory, the GeForce GTX 650 will be 150% quicker than the GeForce GTS 150 overall, because of its greater bandwidth. (explain)

GeForce GTX 650		80000 MB/sec
GeForce GTS 150		32000 MB/sec
	Difference: 48000 (150%)

Texel Rate

The GeForce GTS 150 is a lot (approximately 40%) more effective at anisotropic filtering than the GeForce GTX 650. (explain)

GeForce GTS 150		47360 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 13504 (40%)

Pixel Rate

The GeForce GTX 650 will be quite a bit (about 43%) better at anti-aliasing than the GeForce GTS 150, and should be capable of handling higher resolutions without losing too much performance. (explain)

GeForce GTX 650		16928 Mpixels/sec
GeForce GTS 150		11840 Mpixels/sec
	Difference: 5088 (43%)

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 data (in units of MB per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the bus width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.