GeForce 9500 GT DDR2 vs GeForce GTX 650

Intro

Compare those specifications to the GeForce GTX 650, which uses a 28 nm design. nVidia has set the core speed at 1058 MHz. The GDDR5 RAM is set to run at a speed of 1250 MHz on this specific model. It features 384 SPUs along with 32 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9500 GT DDR2		50 Watts
GeForce GTX 650		64 Watts
	Difference: 14 Watts (28%)

Memory Bandwidth

The GeForce GTX 650 should in theory perform a lot faster than the GeForce 9500 GT DDR2 overall. (explain)

GeForce GTX 650		80000 MB/sec
GeForce 9500 GT DDR2		16000 MB/sec
	Difference: 64000 (400%)

Texel Rate

The GeForce GTX 650 is quite a bit (about 285%) better at texture filtering than the GeForce 9500 GT DDR2. (explain)

GeForce GTX 650		33856 Mtexels/sec
GeForce 9500 GT DDR2		8800 Mtexels/sec
	Difference: 25056 (285%)

Pixel Rate

The GeForce GTX 650 should be a lot (more or less 285%) better at full screen anti-aliasing than the GeForce 9500 GT DDR2, and should be capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 650		16928 Mpixels/sec
GeForce 9500 GT DDR2		4400 Mpixels/sec
	Difference: 12528 (285%)

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 (in units of MB per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the bus width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, 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 are applied in one second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the video 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 maximum number of pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number 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 filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.