GeForce GT 340 1GB vs Radeon HD 4850 512MB

Intro

The GeForce GT 340 1GB features a GPU core clock speed of 550 MHz, and the 1024 MB of GDDR5 RAM runs at 850 MHz through a 128-bit bus. It also features 96 Stream Processors, 32 Texture Address Units, and 8 ROPs.

Compare those specs to the Radeon HD 4850 512MB, which has GPU clock speed of 625 MHz, and 512 MB of GDDR3 RAM set to run at 993 MHz through a 256-bit bus. It also is made up of 800(160x5) Stream Processors, 40 TAUs, and 16 Raster Operation 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 340 1GB Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Radeon HD 4850 512MB Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Specifications

Model	GeForce GT 340 1GB	Radeon HD 4850 512MB
Manufacturer	nVidia	ATi
Year	February 2010	Jun 25, 2008
Code Name	GT215	RV770 PRO
Fab Process	40 nm	55 nm
Bus	PCIe x16	PCIe 2.0 x16
Memory	1024 MB	512 MB
Core Speed	550 MHz	625 MHz
Shader Speed	1340 MHz	(N/A) MHz
Memory Speed	850 MHz	993 MHz
Unified Shaders	96	800(160x5)
Texture Mapping Units	32	40
Render Output Units	8	16
Bus Type	GDDR5	GDDR3
Bus Width	128-bit	256-bit
DirectX Version	DirectX 10.1	DirectX 10.1
OpenGL Version	OpenGL 3.3	OpenGL 3.0
Power (Max TDP)	69 watts	110 watts
Shader Model	4.1	4.1
Bandwidth	54400 MB/sec	63552 MB/sec
Texel Rate	17600 Mtexels/sec	25000 Mtexels/sec
Pixel Rate	4400 Mpixels/sec	10000 Mpixels/sec

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be transferred over the external memory interface within a second. It's worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's 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 can be applied per second. This figure is worked out by multiplying the total number of texture units 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 in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.