GeForce GT 315 vs Radeon HD 4650 1GB

Intro

Compare those specs to the Radeon HD 4650 1GB, which has GPU core speed of 600 MHz, and 1024 MB of GDDR3 memory set to run at 700 MHz through a 128-bit bus. It also is made up of 320(64x5) Stream Processors, 32 TAUs, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 315		52 Watts
Radeon HD 4650 1GB		55 Watts
	Difference: 3 Watts (6%)

Memory Bandwidth

The GeForce GT 315, in theory, should be a little bit faster than the Radeon HD 4650 1GB overall. (explain)

GeForce GT 315		25280 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 2880 (13%)

Texel Rate

The Radeon HD 4650 1GB will be much (about 92%) faster with regards to texture filtering than the GeForce GT 315. (explain)

Radeon HD 4650 1GB		19200 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 9200 (92%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GT 315 is a better choice, not by a very large margin though. (explain)

GeForce GT 315		5000 Mpixels/sec
Radeon HD 4650 1GB		4800 Mpixels/sec
	Difference: 200 (4%)

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 megabytes per second) that can be transferred over the external memory interface in one second. It's worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.