GeForce GTX 295 vs Radeon HD 4870 1GB

Intro

The GeForce GTX 295 features a clock frequency of 576 MHz and a GDDR3 memory speed of 999 MHz. It also features a 448-bit bus, and uses a 55 nm design. It is comprised of 240 SPUs, 80 Texture Address Units, and 28 Raster Operation Units.

Compare that to the Radeon HD 4870 1GB, which comes with GPU core speed of 750 MHz, and 1024 MB of GDDR5 memory running at 900 MHz through a 256-bit bus. It also features 800(160x5) SPUs, 40 Texture Address Units, 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 295 Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Radeon HD 4870 1GB Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Specifications

Model	GeForce GTX 295	Radeon HD 4870 1GB
Manufacturer	nVidia	ATi
Year	January 8, 2009	Jun 25, 2008
Code Name	G200b	RV770 XT
Fab Process	55 nm	55 nm
Bus	PCIe x16 2.0	PCIe 2.0 x16
Memory	896 MB (x2)	1024 MB
Core Speed	576 MHz (x2)	750 MHz
Shader Speed	1242 MHz (x2)	(N/A) MHz
Memory Speed	999 MHz (x2)	900 MHz
Unified Shaders	240 (x2)	800(160x5)
Texture Mapping Units	80 (x2)	40
Render Output Units	28 (x2)	16
Bus Type	GDDR3	GDDR5
Bus Width	448-bit (x2)	256-bit
DirectX Version	DirectX 10	DirectX 10.1
OpenGL Version	OpenGL 3.1	OpenGL 3.0
Power (Max TDP)	289 watts	150 watts
Shader Model	4.0	4.1
Bandwidth	223776 MB/sec	115200 MB/sec
Texel Rate	92160 Mtexels/sec	30000 Mtexels/sec
Pixel Rate	32256 Mpixels/sec	12000 Mpixels/sec

Memory Bandwidth: Bandwidth is the largest amount of data (counted in megabytes per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 processed per second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka 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 - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.