GeForce GTX 750 vs Radeon HD 4650 1GB

Intro

Compare those specs to the Radeon HD 4650 1GB, which comes with core speeds of 600 MHz on the GPU, and 700 MHz on the 1024 MB of GDDR3 memory. It features 320(64x5) SPUs along with 32 Texture Address Units and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

Performance-wise, the GeForce GTX 750 should in theory be quite a bit superior to the Radeon HD 4650 1GB in general. (explain)

GeForce GTX 750		80000 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 57600 (257%)

Texel Rate

The GeForce GTX 750 should be a lot (approximately 70%) more effective at AF than the Radeon HD 4650 1GB. (explain)

GeForce GTX 750		32640 Mtexels/sec
Radeon HD 4650 1GB		19200 Mtexels/sec
	Difference: 13440 (70%)

Pixel Rate

The GeForce GTX 750 should be much (more or less 240%) more effective at AA than the Radeon HD 4650 1GB, and also capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 750		16320 Mpixels/sec
Radeon HD 4650 1GB		4800 Mpixels/sec
	Difference: 11520 (240%)

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 (measured in megabytes per second) that can be moved across the external memory interface within a second. The number is worked out by multiplying the interface width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core speed of the card. 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 fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.