Radeon HD 4850 X2 512MB vs Radeon R7 250

Intro

Compare that to the Radeon R7 250, which has a core clock speed of 1000 MHz and a GDDR5 memory frequency of 1150 MHz. It also features a 128-bit memory bus, and uses a 28 nm design. It features 384 SPUs, 24 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250		65 Watts
Radeon HD 4850 X2 512MB		250 Watts
	Difference: 185 Watts (285%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4850 X2 512MB should theoretically be quite a bit better than the Radeon R7 250 overall. (explain)

Radeon HD 4850 X2 512MB		127104 MB/sec
Radeon R7 250		73600 MB/sec
	Difference: 53504 (73%)

Texel Rate

The Radeon HD 4850 X2 512MB is quite a bit (more or less 108%) faster with regards to anisotropic filtering than the Radeon R7 250. (explain)

Radeon HD 4850 X2 512MB		50000 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 26000 (108%)

Pixel Rate

The Radeon HD 4850 X2 512MB should be quite a bit (more or less 150%) more effective at FSAA than the Radeon R7 250, and also able to handle higher resolutions without slowing down too much. (explain)

Radeon HD 4850 X2 512MB		20000 Mpixels/sec
Radeon R7 250		8000 Mpixels/sec
	Difference: 12000 (150%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of data (measured in MB per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher 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 amount of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the graphics 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 number of pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.