Radeon HD 4650 1GB vs Radeon R7 260X

Intro

Compare those specifications to the Radeon R7 260X, which makes use of a 28 nm design. AMD has set the core speed at 1100 MHz. The GDDR5 RAM is set to run at a frequency of 1625 MHz on this particular model. It features 896 SPUs as well as 56 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 1GB		55 Watts
Radeon R7 260X		115 Watts
	Difference: 60 Watts (109%)

Memory Bandwidth

As far as performance goes, the Radeon R7 260X should theoretically be a lot superior to the Radeon HD 4650 1GB in general. (explain)

Radeon R7 260X		104000 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 81600 (364%)

Texel Rate

The Radeon R7 260X will be much (about 221%) faster with regards to anisotropic filtering than the Radeon HD 4650 1GB. (explain)

Radeon R7 260X		61600 Mtexels/sec
Radeon HD 4650 1GB		19200 Mtexels/sec
	Difference: 42400 (221%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R7 260X is superior to the Radeon HD 4650 1GB, by a large margin. (explain)

Radeon R7 260X		17600 Mpixels/sec
Radeon HD 4650 1GB		4800 Mpixels/sec
	Difference: 12800 (267%)

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 information (in units of MB per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, 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 are applied per second. This figure is calculated by multiplying the total amount of texture units by the core 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 number of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out 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, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.