SLI vs. CrossFireX
As a direct continuation To our previous criticism , Which dealt with the recent launch of the two major video card manufacturers - NVIDIA's GeForce GTX 275 and ATI's Radeon HD 4890, in this review we will compare the technologies and the multiplicity of video cards offered by each. For ATI, this is CrossFireX technology, and for NVIDIA, this is SLI technology.
In the beginning, whether it was NVIDIA with its 6000 series or ATI with the X800 series, the performance presented by the card arrays was quite disappointing, as from a combination of another card to the graphics processing system we would expect double performance compared to a single card, when in fact it went The added performance was much less significant. But now that the technologies have undergone significant optimization, as well as a series of thorough changes, it can certainly be said that in some cases, given full support from the game, the arrays will present double performance than a single card.
In addition, starting with the NVIDIA 8800 series, the SLI technology was further upgraded, giving it support for a three-card system at the same time, 3-Way SLI . Moreover, when the company launched the "GeForce 7950GX2 Its, which contained two graphics cores, was added the option to create an array of four graphics cores in the same system (this array is possible when the system contains two dual-core cards, such as the 7950 GX2, 9800GX2, or GTX 295) - accordingly, this array Called by the company Quad SLI.
ATI's CrossFireX technology did not put its hand in the plate either. When the company's Radeon HD 3000 series was used, it was possible to use up to four video cards simultaneously (unlike the NVIDIA SLI, which allows up to four cores at the same time, Supports only three cards), where this array answers the name Quad-Fire.
In the last review we discussed the nature of three tickets from each company. And so, when the card tests were used as an individual in the battle, we could not resist the temptation of creating the most powerful arrays today. In the first round two cards are used on each side, which will create standard arrays 2-Way SLI And CrossFire.
At the other end, and more extreme, we will compare three-card arrays, which will give us enormous graphics processing power, as we shall see below.
Unlike our regular reviews, whose main purpose is to provide you with information about the current market situation, the purpose of this review is quite different. There is no doubt that in terms of their price tag, the SLI and CrossFireX arrays for the most expensive cards on the market show a cost / benefit ratio that can be found, since an array of three cards will carry a price tag of no less than 4500 NIS, whether you use On NVIDIA cards or ATI cards.
This makes the acquisition of such an array highly questionable, but in terms of performance itself, these systems can deliver the highest performance, with the single most powerful single card in the market.
Therefore, our goal is to understand the nature of the SLI and CrossFireX technologies in terms of the performance they provide compared to individual cards, and less on the profitability of purchasing one or another.
Also, because the cards for high-end users are demanding in terms of their power consumption, this inspection will contain, as in any audit, the power consumption data of the systems in real time, as we will see below, they certainly will not make it easier for those who use them .
We also did not neglect the temperature measurements of the cards in the various arrays, so we can see the effect of adding another card (or even two) to the system in terms of the temperatures at which the tickets will arrive.
Before we present the arrays we have assembled, the performance tests and their results, we encourage you to read our previous review about HD 4890 and GTX 275 cards , In order to better understand how they operate and to be impressed by their performance when they are not part of an array.