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GeForce GTS 450 vs GeForce GTX 260

Intro

The GeForce GTS 450 makes use of a 40 nm design. nVidia has clocked the core speed at 783 MHz. The GDDR5 memory works at a speed of 902 MHz on this specific model. It features 192 SPUs as well as 32 TAUs and 16 Rasterization Operator Units.

Compare that to the GeForce GTX 260, which has GPU clock speed of 576 MHz, and 896 MB of GDDR3 RAM running at 999 MHz through a 448-bit bus. It also is comprised of 192 SPUs, 64 Texture Address Units, and 28 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 106 Watts
GeForce GTX 260 182 Watts
Difference: 76 Watts (72%)

Memory Bandwidth

The GeForce GTX 260 should theoretically be a lot faster than the GeForce GTS 450 in general. (explain)

GeForce GTX 260 111888 MB/sec
GeForce GTS 450 57728 MB/sec
Difference: 54160 (94%)

Texel Rate

The GeForce GTX 260 should be a lot (approximately 47%) faster with regards to anisotropic filtering than the GeForce GTS 450. (explain)

GeForce GTX 260 36864 Mtexels/sec
GeForce GTS 450 25056 Mtexels/sec
Difference: 11808 (47%)

Pixel Rate

The GeForce GTX 260 is much (about 29%) faster with regards to anti-aliasing than the GeForce GTS 450, and also should be capable of handling higher resolutions more effectively. (explain)

GeForce GTX 260 16128 Mpixels/sec
GeForce GTS 450 12528 Mpixels/sec
Difference: 3600 (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

GeForce GTX 260

Specifications

Display Specifications

Hide Specifications

Model GeForce GTS 450 GeForce GTX 260
Manufacturer nVidia nVidia
Year September 2010 June 16, 2008
Code Name GF106 G200
Memory 512 MB 896 MB
Core Speed 783 MHz 576 MHz
Memory Speed 3608 MHz 1998 MHz
Power (Max TDP) 106 watts 182 watts
Bandwidth 57728 MB/sec 111888 MB/sec
Texel Rate 25056 Mtexels/sec 36864 Mtexels/sec
Pixel Rate 12528 Mpixels/sec 16128 Mpixels/sec
Unified Shaders 192 192
Texture Mapping Units 32 64
Render Output Units 16 28
Bus Type GDDR5 GDDR3
Bus Width 128-bit 448-bit
Fab Process 40 nm 65 nm
Transistors 1170 million 1400 million
Bus PCIe x16 PCIe x16 2.0
DirectX Version DirectX 11 DirectX 10
OpenGL Version OpenGL 4.1 OpenGL 3.1

Memory Bandwidth: Bandwidth is the largest amount of information (measured in megabytes per second) that can be moved past the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, 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 is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the clock speed of the card. 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 is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

GeForce GTS 450

GeForce GTX 260

Comments

One Response to “GeForce GTS 450 vs GeForce GTX 260”
gliterman says:

An useful article, I was searching for something like this as I've got a 260 and a nice offer for a gts450
After having a look at the article, I will continue with my 260..

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