GeForce GTS 450 1GB vs GeForce GTX 650

Intro

Compare those specs to the GeForce GTX 650, which has clock speeds of 1058 MHz on the GPU, and 1250 MHz on the 1024 MB of GDDR5 memory. It features 384 SPUs as well as 32 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
GeForce GTS 450 1GB		106 Watts
	Difference: 42 Watts (66%)

Memory Bandwidth

In theory, the GeForce GTX 650 should perform quite a bit faster than the GeForce GTS 450 1GB in general. (explain)

GeForce GTX 650		80000 MB/sec
GeForce GTS 450 1GB		57728 MB/sec
	Difference: 22272 (39%)

Texel Rate

The GeForce GTX 650 will be quite a bit (more or less 35%) better at texture filtering than the GeForce GTS 450 1GB. (explain)

GeForce GTX 650		33856 Mtexels/sec
GeForce GTS 450 1GB		25056 Mtexels/sec
	Difference: 8800 (35%)

Pixel Rate

The GeForce GTX 650 is quite a bit (about 35%) faster with regards to AA than the GeForce GTS 450 1GB, and also able to handle higher resolutions better. (explain)

GeForce GTX 650		16928 Mpixels/sec
GeForce GTS 450 1GB		12528 Mpixels/sec
	Difference: 4400 (35%)

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 largest amount of data (measured in megabytes per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the 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 maximum amount of pixels the graphics 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 number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka 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 potential to get to the maximum fill rate.