01-30-2017 04:22 PM - last edited on 03-05-2024 10:21 PM by ROGBot
01-30-2017 06:02 PM
01-30-2017 06:44 PM
01-30-2017 08:10 PM
Korth wrote:
@Brighttail
Four 1080s will kill fps? I can understand diminishing returns, most games do not implement SLI particularly well so multi-GPU won't scale very well, but isn't 4-SLI still going to outperform 3-SLI, isn't 3-SLI still going to outperform 2-SLI?
Agreed, four GTX1080 cards seems quite wasteful, awful bang for the buck. A very expensive way to (possibly) get a tiny fps bump vs two GTX1080 cards. They might be great for multi-display at high resolutions. They might be great for GPGPU work (like CAD stuff) to a point, though workstation (or Titan) cards with proper DPFP capabilities would generally be a better (and possibly cheaper) choice.
The R5E doesn't allow 4-SLI in x8/x8/x8/x8 configuration? Never tried, lol I just have 2-SLI x16/x16 with x8 PhysX when gaming.
The X99 chipset can support 5-GPU x8/x8/x8/x8/x8 ... or so the specs say ... few X99 mobos have enough PCIe slots and I've never heard of a 5-SLI or 5-CF setup, NVIDIA and AMD can only count to four. I suppose 5-GPU support is intended for workstation GPU stuff, though I think anyone who needs that much GPGPU density in a single machine would be better off running a mobo with a dedicated server chipset (like the C612).
01-31-2017 03:30 AM
01-31-2017 06:30 AM
01-31-2017 10:48 AM
01-31-2017 11:42 AM
01-31-2017 03:13 PM
Brighttail wrote:
Once again, if you actually read the user manual, it says:
"The PCIEX8_4 slot shares bandwidth with M.2 and U.2"
This means that if the fourth PCIE slot is in use, the m.2 slot is turned off. It has NOTHING to do with the number of lanes. It has everything to do with how the motherboard shares the resources available. Just like on the motherboards with Sata-express, if you used one of the PCI-e lanes it would turn off this option and even turn off a couple of SATA ports.
4 x PCIe 3.0 x16 slots (supports x16, x16/x16, x16/x8/x8, x16/x8/x8/x8 or x8/x8/x8/x8 mode with 40-LANE CPU; x16, x16/x8 or x8/x8/x8 mode with 28-LANE CPU)* [CPU] <--where they point out the line you were referring to.
1 x PCIe 2.0 x4 slot** [PCH] 1 x PCIe 2.0 x1 slot [PCH]
40-LANE CPU:
- In 4-Way configuration, if the PCIEX16/X8_1 is used in x16 mode, both U.2 and M.2 ports will be disabled.
28-LANE CPU:
- In 3-Way confutation, U.2 port will be disabled.
- By default, U.2 port is disabled for other configurations. To activate it, please go to BIOS > Advanced > Onboard Device Configuration > PCIEX8_2 PCIEX8_4 and U.2 M.2 Configuration.
* The PCIEX8_4 slot shares bandwidth with M.2 and U.2.
** The PCIEX4_1 slot shares bandwidth with front USB3_34 ports and back USB3.1_EC1_EA2 ports.
If a X2 device is connected to the PCIEx4_1 slot, the front USB3_34 ports will be disabled.
If a X4 or higher device is connected to the PCIEx4_1 slot, both front USB3_34 and back USB3.1_EC1_EA2 ports will be disabled.