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PCiE or M.2 SSD? What is faster?

Longbow1

So i am building a new rig for a client that is a broker and budget is not a issue. Looking at the samsung 980, but then starting thinking that a PCiE based ssd would technically have more bandwidth and could go faster.  Need a professional opinion.  Or is the limitating factor the flash chips?  Because M.2 has 4 lanes right?  and PCiE has 16 in theory, right?

 

Thoughts and opinions

 

Thanks

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8 minutes ago, Longbow1 said:

and PCiE has 16 in theory, right?

Nope, Basically every PCIe NVMe SSD only has 4 lanes. They will be the same, and going M.2 would let you leave more PCIe slots free for other devices in the future.

 

9 minutes ago, Longbow1 said:

samsung 980

980 or 980 Pro? If you're talking about the 980 Pro, fine, it's a fast drive that you really can't tell the difference between it and a good Gen 3 drive. If you're talking about the non-pro drive, just don't. It's a DRAM-less drive so random performance would be a lot lower, and the price for it makes no sense. A good Gen 3 drive with a DRAM cache will cost less and perform better. The Crucial P5, WD SN750, and even the Samsung 970 Evo Plus will be about the same price or less and absolutely crush the 980 in benchmarks. There would also be no noticeable difference outside of a few workloads between any one of those drives and the 980 Pro, and if it were me, I'd spend the extra money you'd spend on the 980 Pro for a higher capacity drive. 

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m.2 is faster, oh and the slot closest to socket is fastest so make sure you put your m.2 there

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7 minutes ago, XcatXboy said:

m.2 is faster

"M.2" is a physical shape standard, not an electrical/signaling speed standard. NVMe (PCIe x4) M.2 drives are faster than SATA M.2 drives.

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samsung 980 pro, sorry.  But technically a PCiE slot has more available lanes(bandwidth) right?  compared to OWC Accelsior 8M2?  Told you that budget is no worries.  this dude has like 2.2 b under management.  I want the ABSOLUTE FASTEST thing on earth! LOL

 

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Would it be better to go with samsung 980 pro's in a raid formation?

 

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1 hour ago, Longbow1 said:

samsung 980 pro, sorry.  But technically a PCiE slot has more available lanes(bandwidth) right?  compared to OWC Accelsior 8M2?  Told you that budget is no worries.  this dude has like 2.2 b under management.  I want the ABSOLUTE FASTEST thing on earth! LOL

 

Yes it has more lanes, but the SSD itself only has 4. Putting a 4 lane ssd into a 16 lane slot doesn't magically make the ssd have 12 more lanes.

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13 minutes ago, Longbow1 said:

Are there any SSD's that utilize for than 4 lanes?

No, but there are cards that allow 4 ssd's to be used, so you could raid those 4 together to get higher speeds, but it's really overkill. 

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