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Yesterday I have bought a second 560GTX TI. I have configured it with my SLI supported motherboard and enabled the SLI. Then I went to play the game. However the system still telling me that I only have 895MB of graphics card. I thought that with SLI enabled cards together double the memory as well as the speed of GPU. I think that I was wrong actually. Is it true?
nVidia SLI resurrects the technology that made him think all fans of 3D card when it was introduced in early 1998. As at the time the dream seem unattainable at first but this solution has the merit of offering an interesting opportunity to upgrade. From a technical point of view nVidia has had the good sense to offer two rendering modes to get the most out of SLI.
Running SLI does not twofold the memory. If every card is 1GB, you will encompass 1GB of graphics memory. since for "doubling" your pace, that might be a small piece much, except you will almost certainly perceive around a 75% performance increase.
The GeForce GTX 560 Ti is based on the new GF114 GPU, which is manufactured in 40-nm process at TSMC and exactly how the GF104's predecessor set to 1.95 billion transistors. The GF114 is an easy evolution to its predecessor and is ultimately a kind of hybrid of GF104 and GF110 dar. Nvidia has on the GF114 GF110 as in the all investigated transistors and uses, if possible, now that with a slower response time to, can save power consumption. Remained the same, the memory interface with four 64-bit controllers that generate a 256 bit wide memory interface. On each controller, one ROP partition is connected with eight ROPS (32 total ROP). The memory of the GeForce GTX 560 Ti is so 1024 MB and can be either halved or doubled - the former is, according to Nvidia for trade but excluded.
No, the memory does not double itself. There are always saved all information simultaneously in two graphics cards.
SLI rendering twines on power by the use of a couple of cards jointly, it does not twice over the efficient memory quantity of obtainable graphics. Every graphics card within an SLI config have to store its personal texture, geometry, as well as frame buffer data separately. Furthermore, the main cards connected toward the output video frame buffer have got to store information approaching in from the next card on top of the SLI connector. There's no doubt a few video memory overhead linked with management among the two cards, as well. Accordingly, a duo of 128MB cards within an SLI rig will operate, efficiently, like a usual graphics solution through 128MB of memory, otherwise maybe somewhat less.
As far as I know memory remains single, so any two cards of 512 remains in SLI / Crossfire also 512MB. The speed is not doubled if your cards in SLI / Crossfire set. Memory 800 MHz processor is not running at 1600MHz because half card is put. Indeed, it is not only to the MB, but you were already behind
Yesterday talking with a friend of mine came out the speech of SLI and Crossfire systems.
My friend argued that when you put two cards in sli memory does not double because each card has to actually load the textures that are also in the other and therefore only the speed of the GPU or nearly doubled.
Now I cannot be sure, but logically, since the games are divided into two cards is natural that the screen must be provided with the same textures in memory if a texture fits in, because both halves of one of the two boards should "ask "the other of the texture in question by failing memory.
If I'm not mistaken memory remains just over 512MB. The amount of memory needed is just the same in both maps. But as you say the amount of memory says nothing about the speed of the video card (s).
Two cards with 512mb memory in an SLI setup is of course a bit overkill, though if memory runs at the same speed as its 256MB brother never hurt. In an SLI setup, the CPU bottleneck a much larger than a setup with a single card. The video card must often wait for the CPU and therefore is not constantly at 100% busy. Such is the case with a single card when you play games on a high resulted with all eye-candy on.