GeForce 9800 GTX+ vs Radeon HD 6770 1GB

Intro

The GeForce 9800 GTX+ comes with a clock frequency of 738 MHz and a GDDR3 memory speed of 1100 MHz. It also uses a 256-bit memory bus, and makes use of a 55 nm design. It is comprised of 128 SPUs, 64 TAUs, and 16 Raster Operation Units.

Compare all that to the Radeon HD 6770 1GB, which uses a 40 nm design. ATi has clocked the core frequency at 900 MHz. The GDDR5 memory runs at a speed of 1050 MHz on this card. It features 800 SPUs along with 40 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 9800 GTX+ Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Radeon HD 6770 1GB Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Specifications

Model	GeForce 9800 GTX+	Radeon HD 6770 1GB
Manufacturer	nVidia	ATi
Year	July 2008	January 2011
Code Name	G92b	Juniper XT
Fab Process	55 nm	40 nm
Bus	PCIe x16 2.0	PCIe x16
Memory	512 MB	1024 MB
Core Speed	738 MHz	900 MHz
Shader Speed	1836 MHz	(N/A) MHz
Memory Speed	1100 MHz	1050 MHz
Unified Shaders	128	800
Texture Mapping Units	64	40
Render Output Units	16	16
Bus Type	GDDR3	GDDR5
Bus Width	256-bit	128-bit
DirectX Version	DirectX 10	DirectX 11
OpenGL Version	OpenGL 3.0	OpenGL 4.1
Power (Max TDP)	145 watts	108 watts
Shader Model	4.0	5.0
Bandwidth	70400 MB/sec	67200 MB/sec
Texel Rate	47232 Mtexels/sec	36000 Mtexels/sec
Pixel Rate	11808 Mpixels/sec	14400 Mpixels/sec

Memory Bandwidth: Bandwidth is the max amount of information (measured in megabytes per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

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