GeForce GTX 950 vs Radeon HD 4850 2GB

Intro

Compare that to the Radeon HD 4850 2GB, which uses a 55 nm design. AMD has set the core speed at 625 MHz. The GDDR4 memory is set to run at a frequency of 993 MHz on this particular model. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 950		90 Watts
Radeon HD 4850 2GB		110 Watts
	Difference: 20 Watts (22%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 950 should theoretically be much better than the Radeon HD 4850 2GB overall. (explain)

GeForce GTX 950		105728 MB/sec
Radeon HD 4850 2GB		63552 MB/sec
	Difference: 42176 (66%)

Texel Rate

The GeForce GTX 950 should be quite a bit (more or less 97%) faster with regards to texture filtering than the Radeon HD 4850 2GB. (explain)

GeForce GTX 950		49152 Mtexels/sec
Radeon HD 4850 2GB		25000 Mtexels/sec
	Difference: 24152 (97%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 950 is superior to the Radeon HD 4850 2GB, and very much so. (explain)

GeForce GTX 950		32768 Mpixels/sec
Radeon HD 4850 2GB		10000 Mpixels/sec
	Difference: 22768 (228%)

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 largest amount of information (in units of MB per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the card will be at handling 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 that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel 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 maximum fill rate.