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M.2 slot placement in new build
Posted on 8/12/21 at 6:23 pm
Posted on 8/12/21 at 6:23 pm
I just finished purchasing components and am about to do my first build next week when everything is here. I haven't done a build IDE was the primary HD connection standard.
I went with a Gigabyte Auros X570 Ultra board. M.2 slot A is on the cpu and slots B and C are on the chipset. All three are PCI4e. Is there a benefit to locating the drive on slot B using the chipset, or is it better to go into slot A running on the cpu bus?
I went with a Gigabyte Auros X570 Ultra board. M.2 slot A is on the cpu and slots B and C are on the chipset. All three are PCI4e. Is there a benefit to locating the drive on slot B using the chipset, or is it better to go into slot A running on the cpu bus?
3
Posted on 8/12/21 at 7:57 pm to TigerFanatic99
If you're only running one NVMe drive, it doesn't really matter on an x570 board, unless you're doing something crazy with your sata ports. With that said, most people run it on the cpu lanes.
This post was edited on 8/12/21 at 7:58 pm
Posted on 8/12/21 at 8:18 pm to Joshjrn
quote:
With that said, most people run it on the cpu lanes.
Aren't the CPU lanes shared with the PCI4e GPU slot? Does that have any impact that would make the Chipset lanes slot preferable?
Posted on 8/12/21 at 8:57 pm to TigerFanatic99
quote:
Aren't the CPU lanes shared with the PCI4e GPU slot? Does that have any impact that would make the Chipset lanes slot preferable?
My understanding (and someone correct me if I'm wrong) is that the CPU has 24 lanes, 20 of which are free. A GPU will use 16, and an NVMe drive will use 4. You get another 8 lanes on the chipset, 4 of which are free. So as long as you aren't running any sata drives at the same time, you can run a x16 gpu, a x4 nvme in slot 1, and a x4 nvme in slot 2 without running into any issues whatsoever. If you add a third nvme, sata connections, etc, then you could theoretically get throttled a bit if you ran certain devices at once (an example I was given at some point was if you simultaneously ran CrystalDisk on both drives in slots 2 and 3, your scores would go down, where if you ran it on slots 1 and 2, they wouldn't). But, outside of some truly unusual use cases, it really shouldn't be a big deal.
Posted on 8/12/21 at 9:03 pm to Joshjrn
Gotcha. The 980PRO is a 2Tb card so its going to be my only drive. No worries about SATA drives or additional M.2's taking lanes, even after I add a discrete gpu. Thanks for the quick feedback.
Posted on 8/12/21 at 9:05 pm to TigerFanatic99
quote:
Aren't the CPU lanes shared with the PCI4e GPU slot? Does that have any impact that would make the Chipset lanes slot preferable?
This may help.
LINK /
Posted on 8/12/21 at 9:12 pm to TigerFanatic99
quote:
Gotcha. The 980PRO is a 2Tb card so its going to be my only drive. No worries about SATA drives or additional M.2's taking lanes, even after I add a discrete gpu. Thanks for the quick feedback.
You’re welcome. Early on in this hobby (which was a grand total of like two years ago
) I bored the absolute frick out of some very smart people, asking them to explain PCIe lanes to me. Figured I would pay it forward And like I said, don’t worry about lanes too much. You can do two nvme drives without affecting anything, and pretty much the only time adding a third would cause any issue whatsoever is if you were frequently transferring data between the drives on slots 2 and 3.
Stressing over PCIe lanes is for people doing exotic workstation home lab crap. We mere mortals almost have to try to frick things up at this point
Eta: This only applies to those running modern cpus on X570 boards. If you’re running older hardware, or more budget boards, it gets more complicated. But X570 is pretty overbuilt for 2021.
This post was edited on 8/12/21 at 9:22 pm
Posted on 8/12/21 at 9:21 pm to Joshjrn
quote:
We mere mortals almost have to try to frick things up at this point
Built a x470 based system about 2 years ago and gave up trying to figure this lane stuff out. Said frick it and plugged stuff in and it worked fine. Benchmarks put me right where I should be.
Posted on 8/12/21 at 9:25 pm to captron
People who consider this a hobby tend to get pretty far in the weeds. We get bored in the year or two between upgrades, and we have to find something to do. I mentioned on another thread that I bought some custom sleeved cables today, not really because I wanted the aesthetic, but because I didn’t like having the extra length in the case back. Not that it’s causing any issue whatsoever in my giant arse o11xl. I just don’t like it. And I’m bored
Posted on 8/12/21 at 9:29 pm to Joshjrn
The whole thing is over built as frick right now. I'm just using a Ryzen 5700G for a while until graphics cards come back to reality in a year or so. At that point I'll swap that out for a 5900X and a RTX something or other. The 5700G only has PCI3 anyway so the 980PRO is not being really taken advantage of yet.
Just trying to future proof for that kind of setup as much as I can. I don't want to put it in a shared slot if it will hamstring it later when I upgrade the cpu/gpu.
Just trying to future proof for that kind of setup as much as I can. I don't want to put it in a shared slot if it will hamstring it later when I upgrade the cpu/gpu.
Posted on 8/12/21 at 9:34 pm to Joshjrn
quote:
People who consider this a hobby tend to get pretty far in the weeds
Right with you. Been in tech for more years than I want to admit and being an old network weenie my home network is WAYYYYY more complex than it needs to be.
Posted on 8/12/21 at 9:34 pm to TigerFanatic99
I completely understand. If you’re building near the end of a chipset’s lifecycle, you want that board to be able to last as long as possible, even if what you’re putting in it now doesn’t really use all the bells and whistles.
Posted on 8/12/21 at 9:54 pm to captron
quote:
Right with you. Been in tech for more years than I want to admit and being an old network weenie my home network is WAYYYYY more complex than it needs to be.
I cba in regards to networking. The most sophisticated thing I do is choose my channels by hand
But you want to start fricking around with air flow patterns, cable management, internal aesthetics, etc? I’ll spend hours on that shite. Hell, I took a box cutter to all of the metal dust filters that came with my case and replaced them with black stocking material just to get more even air flow and because it looks more consistent in letting light into the case
Posted on 8/12/21 at 11:53 pm to TigerFanatic99
Posted on 8/13/21 at 11:53 am to DrewSimp82
I don’t know why, but I’ve always found those diagrams to be incredibly confusing
Posted on 8/13/21 at 5:02 pm to TigerFanatic99
I haven't built since Windows 10/Skylake was introduced. The discussion in this thread makes me feel like I'm back in kindergarten.
Good thing I'm not building for another 2 years, at least. M.2s were just becoming a thing last time. I don't even want to think about graphics card changes during that time.
Good thing I'm not building for another 2 years, at least. M.2s were just becoming a thing last time. I don't even want to think about graphics card changes during that time.
Posted on 8/13/21 at 5:18 pm to Ace Midnight
quote:
I haven't built since Windows 10/Skylake was introduced
Psst. I haven't built one since Windows 3.1 or 3.2 with a 486DX2 build....
Posted on 8/13/21 at 5:28 pm to Lonnie Utah
quote:
Psst. I haven't built one since Windows 3.1 or 3.2 with a 486DX2 build....
Posted on 8/13/21 at 8:57 pm to Lonnie Utah
quote:
486DX2 build
That was my first build, lol. I thought I was hot shite because my older brother only had a 386.
Oh the good old days. My dad and his friend were hired to clean out an old office space and there were 20 or 30 old assed PCs in there with that generation chip and 128mb and 256mb harddrive in various conditions from good shape to trashed. It was a goldmine.
Posted on 8/13/21 at 9:11 pm to Ace Midnight
quote:
I haven't built since Windows 10/Skylake was introduced. The discussion in this thread makes me feel like I'm back in kindergarten.
Good thing I'm not building for another 2 years, at least. M.2s were just becoming a thing last time. I don't even want to think about graphics card changes during that time.
Nah, it’s easier now. Just a bunch of buzz word bullshite that makes it sound harder than it is
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