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GeForce GTS 150 vs GeForce GTS 450

Intro

The GeForce GTS 150 has a GPU core clock speed of 740 MHz, and the 1024 MB of GDDR3 memory runs at 500 MHz through a 256-bit bus. It also is made up of 128 SPUs, 64 Texture Address Units, and 16 ROPs.

Compare all that to the GeForce GTS 450, which makes use of a 40 nm design. nVidia has set the core frequency at 783 MHz. The GDDR5 memory works at a frequency of 902 MHz on this model. It features 192 SPUs along with 32 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 106 Watts
GeForce GTS 150 141 Watts
Difference: 35 Watts (33%)

Memory Bandwidth

Performance-wise, the GeForce GTS 450 should in theory be quite a bit better than the GeForce GTS 150 in general. (explain)

GeForce GTS 450 57728 MB/sec
GeForce GTS 150 32000 MB/sec
Difference: 25728 (80%)

Texel Rate

The GeForce GTS 150 will be quite a bit (approximately 89%) more effective at texture filtering than the GeForce GTS 450. (explain)

GeForce GTS 150 47360 Mtexels/sec
GeForce GTS 450 25056 Mtexels/sec
Difference: 22304 (89%)

Pixel Rate

The GeForce GTS 450 will be a small bit (more or less 6%) better at AA than the GeForce GTS 150, and will be able to handle higher screen resolutions more effectively. (explain)

GeForce GTS 450 12528 Mpixels/sec
GeForce GTS 150 11840 Mpixels/sec
Difference: 688 (6%)

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

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GeForce GTS 150

Amazon.com

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GeForce GTS 450

Amazon.com

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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

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Model GeForce GTS 150 GeForce GTS 450
Manufacturer nVidia nVidia
Year March 10, 2009 September 2010
Code Name G92b GF106
Memory 1024 MB 512 MB
Core Speed 740 MHz 783 MHz
Memory Speed 1000 MHz 3608 MHz
Power (Max TDP) 141 watts 106 watts
Bandwidth 32000 MB/sec 57728 MB/sec
Texel Rate 47360 Mtexels/sec 25056 Mtexels/sec
Pixel Rate 11840 Mpixels/sec 12528 Mpixels/sec
Unified Shaders 128 192
Texture Mapping Units 64 32
Render Output Units 16 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
Fab Process 55 nm 40 nm
Transistors 754 million 1170 million
Bus PCIe x16 2.0 PCIe x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of data (in units of megabytes per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce GTS 150

Amazon.com

Check prices at:

GeForce GTS 450

Amazon.com

Check prices at:

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.

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