GeForce GTX 950 vs Radeon HD 4850 1GB

Intro

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 950		90 Watts
Radeon HD 4850 1GB		110 Watts
	Difference: 20 Watts (22%)

Memory Bandwidth

The GeForce GTX 950 should in theory be much faster than the Radeon HD 4850 1GB overall. (explain)

GeForce GTX 950		105728 MB/sec
Radeon HD 4850 1GB		63552 MB/sec
	Difference: 42176 (66%)

Texel Rate

The GeForce GTX 950 will be a lot (more or less 97%) better at AF than the Radeon HD 4850 1GB. (explain)

GeForce GTX 950		49152 Mtexels/sec
Radeon HD 4850 1GB		25000 Mtexels/sec
	Difference: 24152 (97%)

Pixel Rate

The GeForce GTX 950 is much (more or less 228%) faster with regards to AA than the Radeon HD 4850 1GB, and should be capable of handling higher resolutions without losing too much performance. (explain)

GeForce GTX 950		32768 Mpixels/sec
Radeon HD 4850 1GB		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: Bandwidth is the maximum amount of data (measured in MB per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster 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 are processed per second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

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