GeForce GT 640 DDR3 vs Radeon RX 470

Intro

Compare all of that to the Radeon RX 470, which features a GPU core clock speed of 926 MHz, and 8192 MB of GDDR5 memory set to run at 1650 MHz through a 256-bit bus. It also is comprised of 2048 Stream Processors, 128 TAUs, and 32 ROPs.

Display Graphs

Hide Graphs

Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon RX 470		11756 points
GeForce GT 640 DDR3		1560 points
	Difference: 10196 (654%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3		65 Watts
Radeon RX 470		120 Watts
	Difference: 55 Watts (85%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 470 should perform a lot faster than the GeForce GT 640 DDR3 overall. (explain)

Radeon RX 470		211200 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 154176 (270%)

Texel Rate

The Radeon RX 470 will be a lot (about 312%) faster with regards to texture filtering than the GeForce GT 640 DDR3. (explain)

Radeon RX 470		118528 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 89728 (312%)

Pixel Rate

The Radeon RX 470 will be much (more or less 106%) better at full screen anti-aliasing than the GeForce GT 640 DDR3, and should be able to handle higher resolutions without slowing down too much. (explain)

Radeon RX 470		29632 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 15232 (106%)

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: Bandwidth is the max amount of information (in units of megabytes per second) that can be transferred over the external memory interface within a second. The number is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better 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 processed in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory in a 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 - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.