GeForce GTS 450 vs Radeon HD 4850 1GB

Intro

Compare all that to the Radeon HD 4850 1GB, which uses a 55 nm design. AMD has clocked the core frequency at 625 MHz. The GDDR4 RAM works at a frequency of 993 MHz on this particular card. It features 800(160x5) SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

The Radeon HD 4850 1GB should theoretically perform just a bit faster than the GeForce GTS 450 overall. (explain)

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

Texel Rate

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

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

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTS 450 is the winner, by far. (explain)

GeForce GTS 450		12528 Mpixels/sec
Radeon HD 4850 1GB		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 maximum amount of data (in units of MB per second) that can be transported over the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster 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 processed per second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the video 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 amount of pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.