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ASUS ROG MAXIMUS VIII Extreme PCIe questions

post #1 of 6
Thread Starter 
Hey all,

How is everyone doing today? I have a certain question for ASUS ROG Maximus viii extreme owners, which been bothering me since I built this thing last week. I been fine tuning everything and I had come across something that I didn't realize until yesterday. I notice that my Titan X is running at 8x 1.1 (per GPU-Z) on one of my PCIe slot and not PCIe x16, which I have read that it doesn't make much performance difference but it does bother me. So I have a noctua d15 which is blocking the first PCIe x16 on the mother board and I had place it on the PCIex8/x4_3:

The manual shows:

Which is confusing to me when the mother board only shows x16 on one slot nearest to CPU, second slot is PCIex4_2 (which I tried for the sake of testing and it didn't boot since I remember Nvidia require x8 for their GPU to function), skipping x1 the next slot is x8/x4_3 which I have my titan in. The question now is why does the manual shows 3 x PCIe 3.0/2.0 x16 when the motherboard only has one x16 slot? I know I haven't built a desktop in like 10 years but I am sure I am missing something here. I also notice something about lane switch x16 is that something I need to do to make my current slot x16?

A different question regarding TPM. When did motherboard stop coming with those? The asus doesn't have it which I am trying to figure out where to buy one that will work on this motherboard. I found a 14 pin and a 20 pin motherboard but I can't find a location where to put it. I would appreciate if someone who owns this model let me know where it is located.

Any suggestion or help would be appreciated. Thanks ahead of time.


Intel Core i7 6700K

Noctua NH-D15 SSO2

ASUS ROG Maximus VIII Extreme

32GB (8GBx4) G.Skill Ripjaws PC4 24000 DDR4 3000Mhz

256GB SAMSUNG 950 M.2

1.0TB Seagate 7200RPM 64MB Cache SATA3 6Gbps

12GB GeForce GTX Titan X (Pascal)

Microsoft Windows 10 Pro 64bit

1000watt EVGA G2 80 PLUS

Corsair 760 GT
post #2 of 6
Thread Starter 
nvm I think I just figure it out, but I am still wondering about the TPM if someone can answer that.
post #3 of 6
hey when your in gpu-z make sure to click the question mark on the right and start a render test that will put load on gpu and should see 16x3.0 if not you might have tighten the cpu too much will sometimes bend pin down and will boot but not run full speed..My old msi board came with bent pin good luck
post #4 of 6
Thread Starter 
lol nvm I am back to square one after reading the manual front to back I thought I could of fix it with lane x16 switch on the motherboard, but that didn't work. Also rendering didn't change anything on gpuz. Any owner of this motherboard suggestion would help.



post #5 of 6
sorry man I don,t own your board but mine is set up the same .. my nephew owned your same board though.. and if it does not work right unfortunately chances are bent pin or cpu tighten to much.. my old titan x would run pci 3.0 x4 3.0 and it took me days to figure it out I took my cpu out got magnifying glass looked at all those little pins and yep a few bent I don't think I did it msi has been known to let bent pins slide thru quality control.so I took out sewing needle and used the eye part to try to straighten pins when I re installed I got pci 3.0x8 so I knew to rma board which I got asus hope that's not same for you mabe someone else can chime in but this is not my first build..Good luck
post #6 of 6

The maximum lane allocation for PCIe 3.0 x8/x4_3 slot is 8 lanes. If 16 lanes are the goal use the PCIe 3.0 x16/x8_1 slot.
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