Radeon HD 4650 1GB vs Radeon R7 240

Intro

Compare those specs to the Radeon R7 240, which features core speeds of 730 MHz on the GPU, and 900 MHz on the 2048 MB of DDR3 RAM. It features 320 SPUs along with 20 TAUs and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240		30 Watts
Radeon HD 4650 1GB		55 Watts
	Difference: 25 Watts (83%)

Memory Bandwidth

As far as performance goes, the Radeon R7 240 should theoretically be a lot superior to the Radeon HD 4650 1GB in general. (explain)

Radeon R7 240		28800 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 6400 (29%)

Texel Rate

The Radeon HD 4650 1GB should be much (more or less 32%) faster with regards to texture filtering than the Radeon R7 240. (explain)

Radeon HD 4650 1GB		19200 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 4600 (32%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R7 240 is superior to the Radeon HD 4650 1GB, by a large margin. (explain)

Radeon R7 240		5840 Mpixels/sec
Radeon HD 4650 1GB		4800 Mpixels/sec
	Difference: 1040 (22%)

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 over the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 once again. If 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 number of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total texture units by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the card's clock speed. 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 is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.