GeForce GTX 1630 vs Radeon HD 4870 X2

Intro

Compare those specs to the Radeon HD 4870 X2, which has a clock speed of 750 MHz and a GDDR5 memory speed of 900 MHz. It also features a 256-bit memory bus, and uses a 55 nm design. It is comprised 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 1630		75 Watts
Radeon HD 4870 X2		350 Watts
	Difference: 275 Watts (367%)

Memory Bandwidth

The Radeon HD 4870 X2 should in theory perform quite a bit faster than the GeForce GTX 1630 in general. (explain)

Radeon HD 4870 X2		230400 MB/sec
GeForce GTX 1630		98304 MB/sec
	Difference: 132096 (134%)

Texel Rate

The Radeon HD 4870 X2 is a bit (about 8%) better at anisotropic filtering than the GeForce GTX 1630. (explain)

Radeon HD 4870 X2		60000 Mtexels/sec
GeForce GTX 1630		55680 Mtexels/sec
	Difference: 4320 (8%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 1630 is the winner, but it probably won't make a huge difference. (explain)

GeForce GTX 1630		27840 Mpixels/sec
Radeon HD 4870 X2		24000 Mpixels/sec
	Difference: 3840 (16%)

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 information (counted in megabytes per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.