GeForce GT 315 vs GeForce GTX 650

Intro

Compare those specs to the GeForce GTX 650, which comes with core speeds of 1058 MHz on the GPU, and 1250 MHz on the 1024 MB of GDDR5 RAM. It features 384 SPUs along with 32 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 315		52 Watts
GeForce GTX 650		64 Watts
	Difference: 12 Watts (23%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 650 should theoretically be quite a bit better than the GeForce GT 315 overall. (explain)

GeForce GTX 650		80000 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 54720 (216%)

Texel Rate

The GeForce GTX 650 should be much (more or less 239%) more effective at texture filtering than the GeForce GT 315. (explain)

GeForce GTX 650		33856 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 23856 (239%)

Pixel Rate

The GeForce GTX 650 is a lot (about 239%) faster with regards to AA than the GeForce GT 315, and also should be able to handle higher resolutions better. (explain)

GeForce GTX 650		16928 Mpixels/sec
GeForce GT 315		5000 Mpixels/sec
	Difference: 11928 (239%)

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 (measured in MB per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.