GeForce 9500 GT 512MB GDDR3 vs Radeon HD 4650 1GB

Intro

Compare all that to the Radeon HD 4650 1GB, which features a core clock speed of 600 MHz and a GDDR3 memory speed of 700 MHz. It also features a 128-bit memory bus, and uses a 55 nm design. It features 320(64x5) SPUs, 32 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9500 GT 512MB GDDR3		50 Watts
Radeon HD 4650 1GB		55 Watts
	Difference: 5 Watts (10%)

Memory Bandwidth

Theoretically speaking, the GeForce 9500 GT 512MB GDDR3 is 14% quicker than the Radeon HD 4650 1GB in general, because of its greater data rate. (explain)

GeForce 9500 GT 512MB GDDR3		25600 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 3200 (14%)

Texel Rate

The Radeon HD 4650 1GB will be a lot (about 118%) better at anisotropic filtering than the GeForce 9500 GT 512MB GDDR3. (explain)

Radeon HD 4650 1GB		19200 Mtexels/sec
GeForce 9500 GT 512MB GDDR3		8800 Mtexels/sec
	Difference: 10400 (118%)

Pixel Rate

The Radeon HD 4650 1GB will be a little bit (approximately 9%) better at AA than the GeForce 9500 GT 512MB GDDR3, and also able to handle higher resolutions while still performing well. (explain)

Radeon HD 4650 1GB		4800 Mpixels/sec
GeForce 9500 GT 512MB GDDR3		4400 Mpixels/sec
	Difference: 400 (9%)

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 largest amount of data (counted in megabytes per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the interface width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 again. If 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, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.