Why PCIe ssd?

[natapper]

What is the point of a PCIe ssd? Sata runs at 6gbps which is faster than any ssd at the moment so why do we need to use PCIe? Using PCIe uses up some PCI lanes on your cpu and takes up a PCI slot. This may be a dumb question but it's one I've been wondering for a while so would appreciate an answer.

[VioDuskar]

so you can toss out all of those stupid drive racks.

 

more liquid cooling reservoirs anyone?

[Sportiva]

What is the point of a PCIe ssd? Sata runs at 6gbps which is faster than any ssd at the moment so why do we need to use PCIe? Using PCIe uses up some PCI lanes on your cpu and takes up a PCI slot. This may be a dumb question but it's one I've been wondering for a while so would appreciate an answer.

SSDs actually preform faster SATA is the bottleneck at 6gbps while a pcie SSDs can read/write much faster

[natapper]

SSDs actually preform faster SATA is the bottleneck at 6gbps while a pcie SSDs can read/write much faster

You r saying that sata is a bottle neck but even the Intel 750 ssd only gets to half the 6gbps

[pwn_intended]

What is the point of a PCIe ssd? Sata runs at 6gbps which is faster than any ssd at the moment so why do we need to use PCIe? Using PCIe uses up some PCI lanes on your cpu and takes up a PCI slot. This may be a dumb question but it's one I've been wondering for a while so would appreciate an answer.

 

6 Gbps = 750 MB/s (Theoretical speed =/ practical speed)

So yes, SATA based SSD's are hitting the practical limits of the SATA3 protocol, and PCIe based solutions are coming in to solve the problem.

 

And all the new high performance SATA SSD's are topping out at about 550+ which appears to be about the PRACTICAL limit

[UltraNeonGaming]

You r saying that sata is a bottle neck but even the Intel 750 ssd only gets to half the 6gbps

Yes SATA is a bottleneck for current SSD's.

It's 6gigabits that is the max theoretical speed of SATA, not 6gigabytes. 6Gigabits is 750megabytes.

But that's the theoretical speed so it's not fully achievable hence why SATA is a bottleneck.

[Sam Z Man]

Yes SATA is a bottleneck for current SSD's.

It's 6gigabits that you are talking about, not 6gigabytes. 6Gigabits is 750megabytes.

 

I remember when this used to mindfuck me, then I found out 8bits made a byte and everything made sense.

[Enderman]

You r saying that sata is a bottle neck but even the Intel 750 ssd only gets to half the 6gbps

the intel 750 SSD gets 16000+ Gbps

 

remember this is Gbps NOT GBps

learn the difference

 

SATA3 is bottlenecking SSDs thats why you never see a sata SSD go above about 550MBps

[Fgtfv567]

Sata 3 is a bottleneck at about 700MB/s, and PCIe/sata express/NVMe can alleviate those bottlenecks.

I think I read somewhere that M.2 SSDs don't use up your CPU lanes.. Correct me if I'm wrong please, and I want to know if PCIe SSDs will use CPU lanes

[UltraNeonGaming]

Sata 3 is a bottleneck at about 700MB/s, and PCIe/sata express/NVMe can alleviate those bottlenecks.

I think I read somewhere that M.2 SSDs don't use up your CPU lanes.. Correct me if I'm wrong please, and I want to know if PCIe SSDs will use CPU lanes

PCIe M.2 SSD's run off what ever the motherboard maker has wired that M.2 slot to, some motherboards have it hooked up straight to the CPU and other's to the chipset. But most will link it to the CPU because they want to reserve those chipset PCIe lanes for other stuff, In that case it will use up CPU PCIe lanes.

[Fgtfv567]

All PCIe SSD's run off the CPU's lanes, I'm not aware of a PCIe SSD that runs off the chipset.

If you use an M.2 SSD (Regardless of if it has NVMe support or not) it will run off your CPU and use up PCIe lanes.

So M.2 SSDs, SSDs that plug into a PCIe slot use up CPU lanes, What about SATA express that plugs into 2 normal SATA 3 headers and a special SATA express plug? NVMe plugs in via PCIe right?

[UltraNeonGaming]

So M.2 SSDs, SSDs that plug into a PCIe slot use up CPU lanes, What about SATA express that plugs into 2 normal SATA 3 headers and a special SATA express plug? NVMe plugs in via PCIe right?

I didn't read your post correctly, read my edited post.

M.2 SSD's can either run of the SATA interface, PCIe, Or PCIe with NVMe support.

[Speaker1264]

PCIe also has lower latency from what I've read.