GeForce GTX 285 2GB vs Radeon HD 5830

Intro

The GeForce GTX 285 2GB makes use of a 55 nm design. nVidia has clocked the core frequency at 648 MHz. The GDDR3 RAM is set to run at a speed of 1242 MHz on this particular model. It features 240 SPUs as well as 80 Texture Address Units and 32 Rasterization Operator Units.

Compare those specs to the Radeon HD 5830, which has a GPU core clock speed of 800 MHz, and 1024 MB of GDDR5 RAM set to run at 1000 MHz through a 256-bit bus. It also is made up of 1120(224x5) SPUs, 56 TAUs, and 16 ROPs.

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 GTX 285 2GB Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Radeon HD 5830 Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Specifications

Model	GeForce GTX 285 2GB	Radeon HD 5830
Manufacturer	nVidia	ATi
Year	January 15, 2009	February 25, 2010
Code Name	G200b	Cypress LE
Fab Process	55 nm	40 nm
Bus	PCIe x16 2.0	PCIe 2.1 x16
Memory	2048 MB	1024 MB
Core Speed	648 MHz	800 MHz
Shader Speed	1476 MHz	(N/A) MHz
Memory Speed	1242 MHz	1000 MHz
Unified Shaders	240	1120(224x5)
Texture Mapping Units	80	56
Render Output Units	32	16
Bus Type	GDDR3	GDDR5
Bus Width	512-bit	256-bit
DirectX Version	DirectX 10	DirectX 11
OpenGL Version	OpenGL 3.1	OpenGL 3.2
Power (Max TDP)	204 watts	175 watts
Shader Model	4.0	5.0
Bandwidth	158976 MB/sec	128000 MB/sec
Texel Rate	51840 Mtexels/sec	44800 Mtexels/sec
Pixel Rate	20736 Mpixels/sec	12800 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the largest amount of data (measured in megabytes per second) that can be moved past the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total number of texture units by the core 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.