GeForce GTX 750 Ti vs Radeon HD 4850 X2 512MB

Intro

Compare all that to the Radeon HD 4850 X2 512MB, which uses a 55 nm design. AMD has set the core frequency at 625 MHz. The GDDR3 memory is set to run at a speed of 993 MHz on this card. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 750 Ti		60 Watts
Radeon HD 4850 X2 512MB		250 Watts
	Difference: 190 Watts (317%)

Memory Bandwidth

Performance-wise, the Radeon HD 4850 X2 512MB should theoretically be much better than the GeForce GTX 750 Ti overall. (explain)

Radeon HD 4850 X2 512MB		127104 MB/sec
GeForce GTX 750 Ti		86400 MB/sec
	Difference: 40704 (47%)

Texel Rate

The Radeon HD 4850 X2 512MB is quite a bit (about 23%) better at anisotropic filtering than the GeForce GTX 750 Ti. (explain)

Radeon HD 4850 X2 512MB		50000 Mtexels/sec
GeForce GTX 750 Ti		40800 Mtexels/sec
	Difference: 9200 (23%)

Pixel Rate

The Radeon HD 4850 X2 512MB should be a lot (about 23%) faster with regards to FSAA than the GeForce GTX 750 Ti, and also able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 4850 X2 512MB		20000 Mpixels/sec
GeForce GTX 750 Ti		16320 Mpixels/sec
	Difference: 3680 (23%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of data (measured in megabytes per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen 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 number of texture units by the core clock speed of the chip. The better this number, 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 could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel 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 potential to reach the maximum fill rate.