3-Way SLI and Quad SLI In order to unify two cards using this technology, NVIDIA has implemented two similar systems that can provide improvements in graphics performance of a system to 2.8x (2.8 times) in 3-Way SLI and 1.6x in the case of Quad-SLI, higher than that obtained with a single graphics card. The 3-Way SLI, one of the most enjoyable time to create an SLI system in cost-effectiveness, was born with the emergence of the GeForce 8 Series and the 8800 GTX and Ultra, which at that time were the only able to access this technology, now also implemented with the 9800 GTX cards as the number 9. These three graphics cards through a single unified core of six mouths connector (two per card, unlike the classic SLI made use of only one per card). It is indeed the best option in SLI so far as graphic applications that take advantage of these benefits can be seen an increased performance, as noted above, up to 2.8 times.However, the energy requirements of this setting can be a great disadvantage. For example, the 9800 GTX cards, then two additional peripheral connectors suitable to provide the energy consumed than just PCI Express socket can not provide, resulting in incredible need of six peripheral connectors for 3-Way only sources power more than 1000W can provide. In response to this problem, NVIDIA launched in parallel Hybrid SLI system, which turns off randomly composing the SLI cards to save on consumption, however this technology is available only for a limited number of motherboards and cards. The Quad-SLI SLI is another option actually implemented leaves much to be desired.It is a unification of two GeForce 9800 GX2, that while at first glance appears to be a simple classic two-card SLI actually is to be an explosive combination of four cores, because each card has already two of these unified within a technology very similar to SLI, only requires the use of a single PCI Express. It then results in a 4-core SLI system, which can be interpreted as four cards mononuclear unified, being actually two “two in one.” The problem is that its high cost does not justify the performance improvements that are only 1.6 times larger than a single 9800 GX2, showing that more cores to lower the overall performance multiplication. Moreover, this improvement can be seen only in a much more limited number of applications with 3-Way. An example is Crysis, a game of high demands (currently looking), which only shows its greatest graphic effects work on this configuration.In conclusion, the multiple SLI can be beneficial if it seeks to increase the performance of the latest high-end cards, but not if it seeks to promote a system with only an older card that supports SLI, which may prove much cheaper to buy a new.
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