GeForce GT 450 (OEM) vs Radeon HD 4790

Intro

The GeForce GT 450 (OEM) features a GPU core speed of 790 MHz, and the 1536 MB of GDDR5 memory runs at 1000 MHz through a 192-bit bus. It also is made up of 144 SPUs, 24 TAUs, and 24 Raster Operation Units.

Compare those specifications to the Radeon HD 4790, which comes with core speeds of 600 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 memory. It features 640(128x5) SPUs along with 32 TAUs and 16 Rasterization Operator Units.

Price Comparison

Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.

GeForce GT 450 (OEM) Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Radeon HD 4790 Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Specifications

Model	GeForce GT 450 (OEM)	Radeon HD 4790
Manufacturer	nVidia	ATi
Year	October 2010	2009
Code Name	GF106	RV790
Fab Process	40 nm	55 nm
Bus	PCIe x16	PCIe 2.0 x16
Memory	1536 MB	512 MB
Core Speed	790 MHz	600 MHz
Shader Speed	1580 MHz	(N/A) MHz
Memory Speed	1000 MHz	800 MHz
Unified Shaders	144	640(128x5)
Texture Mapping Units	24	32
Render Output Units	24	16
Bus Type	GDDR5	GDDR5
Bus Width	192-bit	256-bit
DirectX Version	DirectX 11	DirectX 10.1
OpenGL Version	OpenGL 4.1	OpenGL 3.0
Power (Max TDP)	106 watts	(N/A) watts
Shader Model	5.0	4.1
Bandwidth	96000 MB/sec	102400 MB/sec
Texel Rate	18960 Mtexels/sec	19200 Mtexels/sec
Pixel Rate	18960 Mpixels/sec	9600 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the max amount of data (counted in MB per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 amount of texture map elements (texels) that can be applied per 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 graphics 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 amount of pixels that the graphics 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 colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.