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GeForce GTS 450 vs GeForce GTX 260

Intro

The GeForce GTS 450 features a clock frequency of 783 MHz and a GDDR5 memory frequency of 902 MHz. It also makes use of a 128-bit bus, and uses a 40 nm design. It is made up of 192 SPUs, 32 TAUs, and 16 Raster Operation Units.

Compare those specifications to the GeForce GTX 260, which has GPU clock speed of 576 MHz, and 896 MB of GDDR3 RAM set to run at 999 MHz through a 448-bit bus. It also is comprised of 192 Stream Processors, 64 Texture Address Units, 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

Performance-wise, the GeForce GTX 260 should in theory be a lot better 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 will be a lot (about 47%) better at 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

If running with a high resolution is important to you, then the GeForce GTX 260 is the winner, by a large margin. (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: Bandwidth is the max amount of data (counted in megabytes per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better 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 processed per second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip 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 ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability 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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