GeForce 8800 GTX vs Radeon HD 7750

Intro

The GeForce 8800 GTX features core speeds of 575 MHz on the GPU, and 900 MHz on the 768 MB of GDDR3 RAM. It features 128 SPUs as well as 64 Texture Address Units and 24 Rasterization Operator Units.

Compare those specifications to the Radeon HD 7750, which uses a 28 nm design. ATi has clocked the core frequency at 800 MHz. The GDDR5 RAM works at a frequency of 1125 MHz on this model. It features 512 SPUs as well as 32 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 8800 GTX Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Radeon HD 7750 Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Specifications

Model	GeForce 8800 GTX	Radeon HD 7750
Manufacturer	nVidia	ATi
Year	Nov 2006	February 2012
Code Name	G80	Cape Verde Pro
Fab Process	90 nm	28 nm
Bus	PCIe x16	PCIe 3.0 x16
Memory	768 MB	1024 MB
Core Speed	575 MHz	800 MHz
Shader Speed	1350 MHz	(N/A) MHz
Memory Speed	900 MHz	1125 MHz
Unified Shaders	128	512
Texture Mapping Units	64	32
Render Output Units	24	16
Bus Type	GDDR3	GDDR5
Bus Width	384-bit	128-bit
DirectX Version	DirectX 10	DirectX 11.1
OpenGL Version	OpenGL 3.0	OpenGL 4.2
Power (Max TDP)	155 watts	55 watts
Shader Model	4.0	5.0
Bandwidth	86400 MB/sec	72000 MB/sec
Texel Rate	36800 Mtexels/sec	25600 Mtexels/sec
Pixel Rate	13800 Mpixels/sec	12800 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of MB per second) that can be moved over the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the 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 most pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.