GeForce 9800 GX2 vs Radeon R7 250X 2GB

Intro

Compare those specifications to the Radeon R7 250X 2GB, which uses a 28 nm design. AMD has set the core frequency at 1000 MHz. The GDDR5 RAM works at a frequency of 1125 MHz on this card. It features 640 SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X 2GB		95 Watts
GeForce 9800 GX2		197 Watts
	Difference: 102 Watts (107%)

Memory Bandwidth

Theoretically speaking, the GeForce 9800 GX2 is 78% quicker than the Radeon R7 250X 2GB overall, because of its higher data rate. (explain)

GeForce 9800 GX2		128000 MB/sec
Radeon R7 250X 2GB		72000 MB/sec
	Difference: 56000 (78%)

Texel Rate

The GeForce 9800 GX2 will be much (approximately 92%) faster with regards to texture filtering than the Radeon R7 250X 2GB. (explain)

GeForce 9800 GX2		76800 Mtexels/sec
Radeon R7 250X 2GB		40000 Mtexels/sec
	Difference: 36800 (92%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce 9800 GX2 is superior to the Radeon R7 250X 2GB, not by a very large margin though. (explain)

GeForce 9800 GX2		19200 Mpixels/sec
Radeon R7 250X 2GB		16000 Mpixels/sec
	Difference: 3200 (20%)

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 megabytes per second) that can be transferred over the external memory interface in one second. It's worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher 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 one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.