GeForce GTX 650 vs Radeon HD 4850 1GB

Intro

Compare all that to the Radeon HD 4850 1GB, which features GPU core speed of 625 MHz, and 1024 MB of GDDR4 memory running at 993 MHz through a 256-bit bus. It also is comprised of 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
Radeon HD 4850 1GB		110 Watts
	Difference: 46 Watts (72%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 650 is 26% faster than the Radeon HD 4850 1GB in general, because of its higher bandwidth. (explain)

GeForce GTX 650		80000 MB/sec
Radeon HD 4850 1GB		63552 MB/sec
	Difference: 16448 (26%)

Texel Rate

The GeForce GTX 650 is much (approximately 35%) faster with regards to AF than the Radeon HD 4850 1GB. (explain)

GeForce GTX 650		33856 Mtexels/sec
Radeon HD 4850 1GB		25000 Mtexels/sec
	Difference: 8856 (35%)

Pixel Rate

The GeForce GTX 650 is much (more or less 69%) faster with regards to AA than the Radeon HD 4850 1GB, and should be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 650		16928 Mpixels/sec
Radeon HD 4850 1GB		10000 Mpixels/sec
	Difference: 6928 (69%)

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 past the external memory interface in a second. It is calculated by multiplying the bus width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.