Trots att moderkortstillverkarna ofta och gärna framhåller att modeller med styrkretsen Intel X79 för processorfamiljen Sandy Bridge-E har stöd för PCI Express 3.0 utnyttjar Nvidias senaste grafikkort endast den äldre versionen av gränssnittet (2.0), men nu blir det ändring på den biten.
Though we cannot officially support or guarantee 8GT/s speeds for X79/SNB-E, you can manually enable faster 8GT/s bus speeds (at your own risk) on GTX 680 or GTX 670 GPUs using the following executable: force-enable-gen3.exe
I ett kort pressmeddelande förklarar Nvidia att de upptäckt stora variationer i signaltiderna mellan olika moderkort och processorer, vilket kan orsaka fel. Därför aktiveras inte stödet för PCI Express 3.0 i de vanliga drivrutinerna.
Däremot kan den som ändå vill använda den senare versionen av gränssnittet ladda ned en uppdatering som lyfter spärren och aktiverar PCI Express 3.0, men Nvidia garanterar inte att det fungerar felfritt. Filen finns att ladda ned från företagets webbplats.
Geforce 600 Series Gen3 Support On X79 Platform
GeForce GTX 680 and GTX 670 GPUs support PCI Express 3.0. They operate properly within the SIG PCI Express Specification and have been validated on multiple PCI Express 3.0 platforms. Some motherboard manufacturers have released an updated SBIOS to enable the Intel X79/SNB-E PCI Express 2.0 platform to run at up to 8GT/s bus speeds.
We have tested GeForce GTX 680 and GTX 670 GPUs across a number of X79/SNB-E platforms at 8GT/s bus speeds, but have seen significant variation in signal timing across different motherboards and CPUs. Therefore we’ve decided to only support and guarantee PCI Express 2.0 bus speeds on X79/SNB-E with our standard release drivers. Native PCI Express 3.0 platforms (like Ivy Bridge) will run at 8GT/s bus speeds with our standard release drivers.
Though we cannot officially support or guarantee 8GT/s speeds for X79/SNB-E, you can manually enable faster 8GT/s bus speeds (at your own risk) on GTX 680 or GTX 670 GPUs using the following executable: force-enable-gen3.exe
If you would like to revert back to 5GT/s bus speeds you can do so by running the following command from the DOS command line: “force-enable-gen3.exe –revert”
You may download "force-enable-gen3.exe" from the File Attachments section below. You will need to reboot your system for the changes to take effect.
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