Radeon HD 4670 1GB vs Radeon R7 250X

Intro

Compare those specs to the Radeon R7 250X, which features a core clock speed of 1000 MHz and a GDDR5 memory frequency of 1125 MHz. It also features a 128-bit memory bus, and makes use of a 28 nm design. It is comprised of 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 1GB		70 Watts
Radeon R7 250X		95 Watts
	Difference: 25 Watts (36%)

Memory Bandwidth

The Radeon R7 250X, in theory, should perform much faster than the Radeon HD 4670 1GB overall. (explain)

Radeon R7 250X		72000 MB/sec
Radeon HD 4670 1GB		35200 MB/sec
	Difference: 36800 (105%)

Texel Rate

The Radeon R7 250X should be a lot (approximately 67%) faster with regards to anisotropic filtering than the Radeon HD 4670 1GB. (explain)

Radeon R7 250X		40000 Mtexels/sec
Radeon HD 4670 1GB		24000 Mtexels/sec
	Difference: 16000 (67%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R7 250X is superior to the Radeon HD 4670 1GB, by far. (explain)

Radeon R7 250X		16000 Mpixels/sec
Radeon HD 4670 1GB		6000 Mpixels/sec
	Difference: 10000 (167%)

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: Memory bandwidth is the largest amount of data (in units of MB per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the interface width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better 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 amount of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total amount of texture units by the core clock 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 a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the card's 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 many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.