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GeForce GT 450 (OEM) vs Radeon HD 7790

Intro

The GeForce GT 450 (OEM) features a GPU clock speed of 790 MHz, and the 1536 MB of GDDR5 memory is set to run at 1000 MHz through a 192-bit bus. It also features 144 Stream Processors, 24 TAUs, and 24 Raster Operation Units.

Compare those specs to the Radeon HD 7790, which has a core clock speed of 1000 MHz and a GDDR5 memory speed of 1500 MHz. It also features a 128-bit memory bus, and makes use of a 28 nm design. It features 896 SPUs, 56 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790 85 Watts
GeForce GT 450 (OEM) 106 Watts
Difference: 21 Watts (25%)

Memory Bandwidth

Both cards have exactly the same memory bandwidth, so theoretically they should perform the same. (explain)

Texel Rate

The Radeon HD 7790 will be much (about 195%) more effective at texture filtering than the GeForce GT 450 (OEM). (explain)

Radeon HD 7790 56000 Mtexels/sec
GeForce GT 450 (OEM) 18960 Mtexels/sec
Difference: 37040 (195%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GT 450 (OEM) is superior to the Radeon HD 7790, not by a very large margin though. (explain)

GeForce GT 450 (OEM) 18960 Mpixels/sec
Radeon HD 7790 16000 Mpixels/sec
Difference: 2960 (19%)

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 GT 450 (OEM)

Amazon.com

Check prices at:

Radeon HD 7790

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.

Specifications

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Model GeForce GT 450 (OEM) Radeon HD 7790
Manufacturer nVidia AMD
Year October 2010 March 2013
Code Name GF106 Bonaire XT
Memory 1536 MB 1024 MB
Core Speed 790 MHz 1000 MHz
Memory Speed 4000 MHz 6000 MHz
Power (Max TDP) 106 watts 85 watts
Bandwidth 96000 MB/sec 96000 MB/sec
Texel Rate 18960 Mtexels/sec 56000 Mtexels/sec
Pixel Rate 18960 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 144 896
Texture Mapping Units 24 56
Render Output Units 24 16
Bus Type GDDR5 GDDR5
Bus Width 192-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 1170 million 2080 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the bus width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce GT 450 (OEM)

Amazon.com

Check prices at:

Radeon HD 7790

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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