p965 crossfire support

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POSTER: pc hardware news   ||   P965 CROSSFIRE SUPPORT	DATE:2006-10-13
The first measurements with the effectiveness to legalize on platform intel p965 the support Of crossFire recently showed that bottleneck is not the capacity of graphic slots, but also the exchange rate of data between them. If in the case  Of intel 975X chipset this exchange is in  mode peer-to-peer inside the north bridge, then in  chipset  intel  p965 such slots are scattered on  different parts chipset, and communicate with slow DMI interface. Does those limitations allow the use of the so-called program crossFire, used by  video card of series  radeon  x1600 and Radeon  x1300? As it became known from the ATI representatives , such limitations exist. The crossFire support  for the intel  p965 chipset  is limited only to the configurations, which imply to the data exchange between  video card on  special hardware interfaces. For example, video card of  families  radeon  x1800, Radeon  x1900 and Radeon  x1950 this will be so-called dongle " with the condition to use as master- card ". video cards  radeon  x1950  pro and Radeon  x1650 XT also can work in crossFire mode on chipset  intel  p965, since they use the built-in engine compositing   and the special interface For  video card of series  radeon  x1600 and Radeon  x1300 the support Of crossFire using  chipset  intel  p965 was rejected from  considerations to retain  the effectiveness of similar configurations. in the practice the pair of  video card  radeon  x1300 in the crossFire mode  on the board with chipset  intel  p965 will succeed to work, but the performance can be low . Let us note that the SLI technology on chipset  intel  p965 can suffer from  similar problems, due to chipset architecture . By the way, ATI counts on the mode “peer-to-peer”, also, in the case of  RD600 chipset. Although the graphic slots will work according to the formula "PCI  express x8 + PCI  express x8 + PCI  express x2", the data exchange channel between them will be located inside the north bridge, it will possess low delays "latency" and high speed. There is no need to use the formulas of  type “PCI  express  x16 +  PCI  express of x16” , and the saved on the number of  PCI express lines  will be expressed in the low price of chipset RD600. motherboards on its basis must cost on the level of  products on  base Of p965. However, the motherboards producers can make their valuations, as we could be convinced based on the example from DFI. Related Products :

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