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Old November 26, 2017, 09:22 AM
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Default PCI e Lanes and SSD

Hey guys , I cant seem to find a clear answer to this anywhere so here it goes.

I ran out of space on my 120 gb ssd and bought another one (250 gb). I reinstalled windows on the 250 but left the 120 in for storage.

Now I started to read that ssd drives use up pci e lanes, I noticed when rendering ( gpu based) that it seems to go slower than before the upgrade..

Im not sure if its something else causing this, may be something in my scene or maybe just a placebo effect..

But Is it possible with both ssd's installed that im robbing lanes that my gpu was using?

Im on a p45 chipset with my q9550 ocd, the mobo says it supports 16 pci express lanes and my gpu (gtx970) uses 16, but ive read these ssds use up like 4 pci lanes each..

Ive also read that the devices operate at the slowest installed device?

Thanks as always for your expert input !
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Old November 26, 2017, 09:37 AM
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That really isn't the case w/ boards that have a southbridge chipset. The ICH10 southbridge handles SATA. So your SSDs should have no impact on the PCIe lanes at all.
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Old November 27, 2017, 10:40 AM
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Oh ok thanks for clearing that up. I wonder how much the south bridge can handle.
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Old November 27, 2017, 11:29 AM
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Depends on the chipset. But we are talking NVME drives here, and they take 4 lanes each. Is really not the case of your system. Newer boards have up to 3 NVME drive placements so that is 12 lanes there just for NVME drives. BTW, when do you upgrade from that old busted system?
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Old November 27, 2017, 06:05 PM
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Ahh ok, so my slow down was most likely a placebo effect..
Well im planning a 8700k and 1080ti build but with canada computers since they offer financing, problem they only offer the financing in store and the items i want are never in stock..
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