GeForce 9400 GT 256MB vs GeForce GTX 465

Intro

Compare all that to the GeForce GTX 465, which has core clock speeds of 607 MHz on the GPU, and 802 MHz on the 1024 MB of GDDR5 RAM. It features 352 SPUs along with 44 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9400 GT 256MB		50 Watts
GeForce GTX 465		200 Watts
	Difference: 150 Watts (300%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 465 should be 702% faster than the GeForce 9400 GT 256MB overall, due to its greater data rate. (explain)

GeForce GTX 465		102592 MB/sec
GeForce 9400 GT 256MB		12800 MB/sec
	Difference: 89792 (702%)

Texel Rate

The GeForce GTX 465 is a lot (approximately 507%) faster with regards to texture filtering than the GeForce 9400 GT 256MB. (explain)

GeForce GTX 465		26708 Mtexels/sec
GeForce 9400 GT 256MB		4400 Mtexels/sec
	Difference: 22308 (507%)

Pixel Rate

The GeForce GTX 465 should be quite a bit (about 783%) more effective at FSAA than the GeForce 9400 GT 256MB, and capable of handling higher screen resolutions better. (explain)

GeForce GTX 465		19424 Mpixels/sec
GeForce 9400 GT 256MB		2200 Mpixels/sec
	Difference: 17224 (783%)

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 information (in units of megabytes per second) that can be transferred past the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 texture map elements (texels) that are processed in one second. This is calculated by multiplying the total 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 applied per second.

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