Radeon HD 7990 vs Radeon R7 250

Intro

Compare those specifications to the Radeon R7 250, which comes with a clock frequency of 1000 MHz and a GDDR5 memory frequency of 1150 MHz. It also features a 128-bit memory bus, and makes use of a 28 nm design. It features 384 SPUs, 24 Texture Address Units, and 8 ROPs.

Display Graphs

Hide Graphs

Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 7990		15520 points
Radeon R7 250		1836 points
	Difference: 13684 (745%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250		65 Watts
Radeon HD 7990		375 Watts
	Difference: 310 Watts (477%)

Memory Bandwidth

The Radeon HD 7990, in theory, should perform quite a bit faster than the Radeon R7 250 in general. (explain)

Radeon HD 7990		576000 MB/sec
Radeon R7 250		73600 MB/sec
	Difference: 502400 (683%)

Texel Rate

The Radeon HD 7990 will be a lot (more or less 913%) better at anisotropic filtering than the Radeon R7 250. (explain)

Radeon HD 7990		243200 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 219200 (913%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 7990 is superior to the Radeon R7 250, and very much so. (explain)

Radeon HD 7990		60800 Mpixels/sec
Radeon R7 250		8000 Mpixels/sec
	Difference: 52800 (660%)

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: Bandwidth is the maximum amount of data (measured in megabytes per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory speed. If the card has DDR memory, it should be multiplied by 2 again. If it uses 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, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units 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 quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.