Radeon HD 4650 1GB vs Radeon R7 370 4G

Intro

Compare those specifications to the Radeon R7 370 4G, which comes with a clock speed of 975 MHz and a GDDR5 memory speed of 1400 MHz. It also features a 256-bit memory bus, and makes use of a 28 nm design. It is comprised of 1024 SPUs, 64 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 1GB		55 Watts
Radeon R7 370 4G		110 Watts
	Difference: 55 Watts (100%)

Memory Bandwidth

Theoretically, the Radeon R7 370 4G should perform a lot faster than the Radeon HD 4650 1GB overall. (explain)

Radeon R7 370 4G		179200 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 156800 (700%)

Texel Rate

The Radeon R7 370 4G is much (more or less 225%) more effective at AF than the Radeon HD 4650 1GB. (explain)

Radeon R7 370 4G		62400 Mtexels/sec
Radeon HD 4650 1GB		19200 Mtexels/sec
	Difference: 43200 (225%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R7 370 4G is a better choice, by a large margin. (explain)

Radeon R7 370 4G		31200 Mpixels/sec
Radeon HD 4650 1GB		4800 Mpixels/sec
	Difference: 26400 (550%)

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 maximum amount of data (in units of megabytes per second) that can be transferred past the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed 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 this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.