GeForce GTS 450 1GB vs Radeon HD 4850 512MB

Intro

Compare all of that to the Radeon HD 4850 512MB, which features a GPU core clock speed of 625 MHz, and 512 MB of GDDR3 memory set to run at 993 MHz through a 256-bit bus. It also is comprised of 800(160x5) Stream Processors, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 1GB		106 Watts
Radeon HD 4850 512MB		110 Watts
	Difference: 4 Watts (4%)

Memory Bandwidth

The Radeon HD 4850 512MB should theoretically be a little bit faster than the GeForce GTS 450 1GB overall. (explain)

Radeon HD 4850 512MB		63552 MB/sec
GeForce GTS 450 1GB		57728 MB/sec
	Difference: 5824 (10%)

Texel Rate

The GeForce GTS 450 1GB will be just a bit (more or less 0%) better at texture filtering than the Radeon HD 4850 512MB. (explain)

GeForce GTS 450 1GB		25056 Mtexels/sec
Radeon HD 4850 512MB		25000 Mtexels/sec
	Difference: 56 (0%)

Pixel Rate

The GeForce GTS 450 1GB is much (about 25%) faster with regards to FSAA than the Radeon HD 4850 512MB, and also capable of handling higher resolutions better. (explain)

GeForce GTS 450 1GB		12528 Mpixels/sec
Radeon HD 4850 512MB		10000 Mpixels/sec
	Difference: 2528 (25%)

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: Bandwidth is the max amount of information (in units of MB per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the interface width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 once 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, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum 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 higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.