Intel Optane 905p on x4 PCIE 3.0 PCH Slot

[Daharen]

So I am using a Gigabyte AORUS Z390 Master, I know for a fact that an overclocked 2080 ti can saturate a CPU 8x PCIE 3.0 Lane and while the 2-3% performance drop is mild, it does defeat the point of overclocking if I'm bottlenecking. As such I am not fond of the idea of splitting my CPU lanes to give one to my 905p, which can only use 4 lanes anyways. My question is if a dedicated x4 PCIE 3.0 PCH slot will effect the 905p's performance? Latency? Actual throughput? Since the 905p relies on low latency processing of small files is latency a cumulative problem?

[Electronics Wizardy]

Optane will still work fine off the pch lanes.  The performance difference is tiny, and you won't fill the dmi as its very rare to be doing sequential speeds and using other things on the dmi.

 

But for almost all users, esp for gaming, just get a nand ssd, the difference is tiny and you probably won't notice it.

[Daharen]

1 hour ago, Electronics Wizardy said:

Clip...

Thanks for the reply, the rig is definitely not about practicality at all, it's an optimized performance cost doesn't matter sort of thing. Ideally trying to get the most gaming performance I can. Admitably the SSD isn't going to impact gaming performance at all, but I figured while I'm dropping all that money on other expensive parts, might as well get the best hard drive on the market. I had considered going LGA 2066 and running a 7980XE, but it doesn't actually perform better in most games next to the most recent benchmarks of the i9-9900k, so its optimizing in a direction I don't care for. That said, I am definitely running into some serious PCIE Lane restrictions that make me wonder if it's worth the i9-9900k. After all, even if it is the best CPU for gaming because of its single thread capacity and architecture, that does me very little good if I'm choked by limited PCIE lanes, particularly since the 2080 ti benefits from 16x slots, and the absolute 'BEST' that you can do on the Z390 chipset is SLI in an 8/8 configuration... I still haven't decided if I'm going to radically rethink this whole build or not.. We'll see.

[Electronics Wizardy]

20 minutes ago, Daharen said:

I am definitely running into some serious PCIE Lane restrictions

What all are you running?

 

SLI gpus on x8 really won't make a big differnce, a few percent at most. Id just run a single gpu though.

[Daharen]

Gigabyte AORUS Master Z390
i9-9900k, delidded, lapped die, direct die liquid metal cooling
Grizzly Conductonaught TIM
NudeCNC V1 CPU Block
AlphaCool D5 Resevoir with VPP655 Pump
EKWB Supremacy GPU Cooler
Antec SpotCool System Cooler (For GPU VRMs)
EVGA Powerlink
EVGA 2080 ti FTW3 Ultra (Still Debating The Second One, I picked it for the improved PCB and additional phases)
Phantek Primo Case
Seasonic 1000W PRIME Titanium PCU
Nanoxia Deep Silence 120 mm Fans x4
EK-Coolstream XE 480, 60mm
64 Gig Trident Z 3400
Intel Optane 905p 960gig PCIe SSD (Boot)
Samsung 970 Pro 1 TB M.2 SSD (Data)

And just for good measure to make the power delivery extra smooth a CyberPower PR2200LCDSL UPS

Pretty sure that's everything, but I might have left something out. (Edited forgot the hard-drives, go figure that's what I'd forget on this page)

Edited October 24, 2018 by Daharen
Keep forgetting stuff.