GeForce GTS 450 1GB vs GeForce GTX 965M

Intro

Compare all of that to the GeForce GTX 965M, which features core speeds of 944 MHz on the GPU, and 1000 MHz on the 2048 MB of GDDR5 RAM. It features 1024 SPUs along with 64 TAUs and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
GeForce GTS 450 1GB		106 Watts
	Difference: 46 Watts (77%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 965M should be a bit faster than the GeForce GTS 450 1GB overall. (explain)

GeForce GTX 965M		64000 MB/sec
GeForce GTS 450 1GB		57728 MB/sec
	Difference: 6272 (11%)

Texel Rate

The GeForce GTX 965M is quite a bit (more or less 141%) better at anisotropic filtering than the GeForce GTS 450 1GB. (explain)

GeForce GTX 965M		60416 Mtexels/sec
GeForce GTS 450 1GB		25056 Mtexels/sec
	Difference: 35360 (141%)

Pixel Rate

The GeForce GTX 965M should be a lot (more or less 141%) more effective at full screen anti-aliasing than the GeForce GTS 450 1GB, and also should be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 965M		30208 Mpixels/sec
GeForce GTS 450 1GB		12528 Mpixels/sec
	Difference: 17680 (141%)

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 transferred past the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 again. If it uses 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 high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, 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 most pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.