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GeForce GTS 450 vs GeForce GTX 460

Intro

The GeForce GTS 450 uses a 40 nm design. nVidia has clocked the core frequency at 783 MHz. The GDDR5 memory works at a speed of 902 MHz on this particular model. It features 192 SPUs as well as 32 Texture Address Units and 16 ROPs.

Compare those specifications to the GeForce GTX 460, which comes with core speeds of 675 MHz on the GPU, and 900 MHz on the 768 MB of GDDR5 RAM. It features 336 SPUs along with 56 Texture Address Units 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

The GeForce GTX 460 should theoretically perform a lot 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 will be quite a bit (more or less 51%) more effective at texture 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 should be a lot (approximately 29%) faster with regards to full screen anti-aliasing than the GeForce GTS 450, and also capable of handling higher resolutions without losing too much performance. (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: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the interface width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. 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 maximum fill rate.

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