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GeForce GTS 450 vs GeForce GTX 460

Intro

The GeForce GTS 450 comes with a GPU clock speed of 783 MHz, and the 512 MB of GDDR5 memory is set to run at 902 MHz through a 128-bit bus. It also is comprised of 192 Stream Processors, 32 TAUs, and 16 Raster Operation Units.

Compare all of that to the GeForce GTX 460, which uses a 40 nm design. nVidia has set the core frequency at 675 MHz. The GDDR5 memory runs at a frequency of 900 MHz on this specific model. It features 336 SPUs along with 56 TAUs and 24 Rasterization Operator Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 106 Watts
GeForce GTX 460 150 Watts
Difference: 44 Watts (42%)

Memory Bandwidth

Theoretically, the GeForce GTX 460 should perform quite a bit faster than the GeForce GTS 450 in general. (explain)

GeForce GTX 460 86400 MB/sec
GeForce GTS 450 57728 MB/sec
Difference: 28672 (50%)

Texel Rate

The GeForce GTX 460 is a lot (about 51%) better at anisotropic filtering than the GeForce GTS 450. (explain)

GeForce GTX 460 37800 Mtexels/sec
GeForce GTS 450 25056 Mtexels/sec
Difference: 12744 (51%)

Pixel Rate

The GeForce GTX 460 is much (more or less 29%) more effective at AA than the GeForce GTS 450, and also will be able to handle higher resolutions while still performing well. (explain)

GeForce GTX 460 16200 Mpixels/sec
GeForce GTS 450 12528 Mpixels/sec
Difference: 3672 (29%)

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

GeForce GTS 450

Amazon.com

GeForce GTX 460

Amazon.com

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

Model GeForce GTS 450 GeForce GTX 460
Manufacturer nVidia nVidia
Year September 2010 July 2010
Code Name GF106 GF104
Fab Process 40 nm 40 nm
Bus PCIe x16 PCIe x16
Memory 512 MB 768 MB
Core Speed 783 MHz 675 MHz
Shader Speed 1566 MHz 1350 MHz
Memory Speed 902 MHz (3608 MHz effective) 900 MHz (3600 MHz effective)
Unified Shaders 192 336
Texture Mapping Units 32 56
Render Output Units 16 24
Bus Type GDDR5 GDDR5
Bus Width 128-bit 192-bit
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1
Power (Max TDP) 106 watts 150 watts
Shader Model 5.0 5.0
Bandwidth 57728 MB/sec 86400 MB/sec
Texel Rate 25056 Mtexels/sec 37800 Mtexels/sec
Pixel Rate 12528 Mpixels/sec 16200 Mpixels/sec

Memory Bandwidth: Bandwidth is the largest amount of data (measured in MB per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 number of texture map elements (texels) that are 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 higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a 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. Pixel rate is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

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