GeForce GTX 465 vs Radeon HD 7850

Intro

Compare those specs to the Radeon HD 7850, which features clock speeds of 860 MHz on the GPU, and 1200 MHz on the 2048 MB of GDDR5 RAM. It features 1024 SPUs as well as 64 Texture Address Units and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850		130 Watts
GeForce GTX 465		200 Watts
	Difference: 70 Watts (54%)

Memory Bandwidth

In theory, the Radeon HD 7850 is 50% quicker than the GeForce GTX 465 overall, because of its greater data rate. (explain)

Radeon HD 7850		153600 MB/sec
GeForce GTX 465		102592 MB/sec
	Difference: 51008 (50%)

Texel Rate

The Radeon HD 7850 should be quite a bit (approximately 106%) faster with regards to anisotropic filtering than the GeForce GTX 465. (explain)

Radeon HD 7850		55040 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 28332 (106%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 7850 is superior to the GeForce GTX 465, by a large margin. (explain)

Radeon HD 7850		27520 Mpixels/sec
GeForce GTX 465		19424 Mpixels/sec
	Difference: 8096 (42%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.