Radeon HD 4650 1GB vs Radeon R7 370 2G

Intro

Compare all that to the Radeon R7 370 2G, which features a core clock speed of 975 MHz and a GDDR5 memory frequency of 1400 MHz. It also features a 256-bit memory bus, and makes use of a 28 nm design. It features 1024 SPUs, 64 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 1GB		55 Watts
Radeon R7 370 2G		110 Watts
	Difference: 55 Watts (100%)

Memory Bandwidth

The Radeon R7 370 2G, in theory, should be a lot faster than the Radeon HD 4650 1GB in general. (explain)

Radeon R7 370 2G		179200 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 156800 (700%)

Texel Rate

The Radeon R7 370 2G should be quite a bit (about 225%) faster with regards to texture filtering than the Radeon HD 4650 1GB. (explain)

Radeon R7 370 2G		62400 Mtexels/sec
Radeon HD 4650 1GB		19200 Mtexels/sec
	Difference: 43200 (225%)

Pixel Rate

The Radeon R7 370 2G is much (about 550%) more effective at anti-aliasing than the Radeon HD 4650 1GB, and should be capable of handling higher screen resolutions more effectively. (explain)

Radeon R7 370 2G		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 largest amount of information (in units of MB per second) that can be moved over the external memory interface in a second. It's worked out by multiplying the bus width by its memory speed. In the case of DDR memory, it must 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, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few 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.