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GeForce GTS 450 vs GeForce GTX 260

Intro

The GeForce GTS 450 features clock speeds of 783 MHz on the GPU, and 902 MHz on the 512 MB of GDDR5 RAM. It features 192 SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

Compare all that to the GeForce GTX 260, which features a clock speed of 576 MHz and a GDDR3 memory speed of 999 MHz. It also uses a 448-bit bus, and makes use of a 65 nm design. It is comprised of 192 SPUs, 64 TAUs, and 28 ROPs.

(No game benchmarks for this combination yet.)

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

Theoretically speaking, the GeForce GTX 260 should perform much faster than the GeForce GTS 450 overall. (explain)

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

Texel Rate

The GeForce GTX 260 is a lot (approximately 47%) faster with regards to texture 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 quite a bit (approximately 29%) better at FSAA than the GeForce GTS 450, and should be capable of handling higher screen resolutions without slowing down too much. (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

Amazon.com

GeForce GTX 260

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 260
Manufacturer nVidia nVidia
Year September 2010 June 16, 2008
Code Name GF106 G200
Fab Process 40 nm 65 nm
Bus PCIe x16 PCIe x16 2.0
Memory 512 MB 896 MB
Core Speed 783 MHz 576 MHz
Shader Speed 1566 MHz 1242 MHz
Memory Speed 902 MHz (3608 MHz effective) 999 MHz (1998 MHz effective)
Unified Shaders 192 192
Texture Mapping Units 32 64
Render Output Units 16 28
Bus Type GDDR5 GDDR3
Bus Width 128-bit 448-bit
DirectX Version DirectX 11 DirectX 10
OpenGL Version OpenGL 4.1 OpenGL 3.1
Power (Max TDP) 106 watts 182 watts
Shader Model 5.0 4.0
Bandwidth 57728 MB/sec 111888 MB/sec
Texel Rate 25056 Mtexels/sec 36864 Mtexels/sec
Pixel Rate 12528 Mpixels/sec 16128 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be moved over the external memory interface in one second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total texture units by the core speed of the chip. The better this number, the better the video 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 maximum amount of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate 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 filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

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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