G4x4 on G3x4 performance?

[Fan de LTT]

Would a Gen 4x4 NVMe M.2 drive work faster than a native Gen 3x4 NMVe M.2 on a Gen 3x4 socket?

 

(Taking into account they are designed to transfer data at speeds above the 3.94GB/s of Gen 3x4).

 

Original:

¿Funcionaría más rápido una unidad M.2 NVMe Gen 4x4 que una nativa Gen 3x4 en un zócalo Gen 3x4?

 

(Teniendo en cuenta que están diseñadas para transferir datos a velocidades superiores a los 3,94GB/s de Gen 3x4).

[Levent]

Just now, Fan de LTT said:

Would a Gen 4x4 NVMe M.2 drive work faster than a native Gen 3x4 NMVe M.2 on a Gen 3x4 socket?

Not necessarily, performance does not just depend on the NVME transfer speed.

[RONOTHAN##]

3 minutes ago, Fan de LTT said:

Would a Gen 4x4 NVMe M.2 drive work faster than a native Gen 3x4 NMVe M.2 on a Gen 3x4 socket?

No. I did do some testing for it a while back to prove a point (you can probably find it if you look long enough, screenshots were posted on here), and the Gen 4 drives topped out at the same ~3.5GB/s that everything else does. 

[Supersonicwolfe]

2 minutes ago, Fan de LTT said:

Would a Gen 4x4 NVMe M.2 drive work faster than a native Gen 3x4 NMVe M.2 on a Gen 3x4 socket?

 

(Taking into account they are designed to transfer data at speeds above the 3.94GB/s of Gen 3x4).

 

Original:

¿Funcionaría más rápido una unidad M.2 NVMe Gen 4x4 que una nativa Gen 3x4 en un zócalo Gen 3x4?

 

(Teniendo en cuenta que están diseñadas para transferir datos a velocidades superiores a los 3,94GB/s de Gen 3x4).

Nope, just like GPU, it will use the lowest supported standard.

Gen 4x4 SSD will use the lower Gen 3x4 communication protocol instead.

 

Same applies if you plug a Gen 3x4 drive into a Gen 4x4 slot

[kokosnh]

3 hours ago, Fan de LTT said:

Would a Gen 4x4 NVMe M.2 drive work faster than a native Gen 3x4 NMVe M.2 on a Gen 3x4 socket?

 

It's strangely constructed question.

Top of the line PCIE 4.0 SSD, will be faster, then top of the line PCIe 3.0 SSD (as 2 generation of SSD controller, and NAND will do the the work ) even in PCIe 3.0 slot. 
But the sequential speeds will be similar, as both are capped on PCIE 3.0 x4.

Only in CPU M.2 slot, you could see the 4.0 gen one, do over 3500MBps
 

[Fan de LTT]

23 hours ago, Supersonicwolfe said:

Gen 4x4 SSD will use the lower Gen 3x4 communication protocol instead.

 

Are actually the R/W speed limits imposed by the NVMe protocol?

 

I thinked the R/W speed limits are imposed by both the bus specification and the controller capabilities with the operation of the device done at the slowest of the two.

 

In a highway designed to drive up to 400KMH~249.6MPH a Hennessey Venom F5 (rated 300MPH~483KMH) could reach more easily the speed limit of the medium -with and ample room of near 83KMH extra speed- than a Ford GT40 Mk I (rated 187MPH~301KMH) that does not even approach -lacking 99KMH to match the maximum speed limit design of the highway in example-. (To explain my point).

[Supersonicwolfe]

11 minutes ago, Fan de LTT said:

 

Are actually the R/W speed limits imposed by the NVMe protocol?

 

I thinked the R/W speed limits are imposed by both the bus specification and the controller capabilities with the operation of the device done at the slowest of the two.

 

In a highway designed to drive up to 400KMH~249.6MPH a Hennessey Venom F5 (rated 300MPH~483KMH) could reach more easily the speed limit of the medium -with and ample room of near 83KMH extra speed- than a Ford GT40 Mk I (rated 187MPH~301KMH) that does not even approach -lacking 99KMH to match the maximum speed limit design of the highway in example-. (To explain my point).

Nope R/W are more limited by the Dram chips themselves. PCIe 3.0x4 are fast enough that most  drives are not going to use all the bandwidth.

(Plus most PC R/W are random read/write anyway)

And it's also limited by heat too... this is one of the main reasion you don't see any PCIe 5.0 SSDs yet

[Fan de LTT]

20 hours ago, kokosnh said:

It's strangely constructed question.

 

I'm not a native English speaker.

 

Quote

Only in CPU M.2 slot, you could see the 4.0 gen one, do over 3500MBps

 

That is my guess but extended to any Gen 4x4 M.2 socket in the board (as long as enough PCIe 3.0 lines are available for all the M.2 sockets to let them work with 4 PCIe 3.0 lines).

[Supersonicwolfe]

28 minutes ago, Fan de LTT said:

 

I'm not a native English speaker.

 

 

That is my guess but extended to any Gen 4x4 M.2 socket in the board (as long as enough PCIe 3.0 lines are available for all the M.2 sockets to let them work with 4 PCIe 3.0 lines).

To be honest, unless you do continuous transfer a lot like editing videos. It won't have a perceivable difference. (I don't feel any difference between a 256GB Adata S11 Pro or one of the fastest WD SN850X)

[Fan de LTT]

14 minutes ago, Supersonicwolfe said:

To be honest, unless you do continuous transfer a lot like editing videos. It won't have a perceivable difference. (I don't feel any difference between a 256GB Adata S11 Pro or one of the fastest WD SN850X)

 

The main purpose, at least in my case, in using a Gen 4x4 NVMe M.2 on a Gen 3x4 socket is to get some extra performance from time to time in the appropiate tasks that benefits from the higher speed specs of the Gen 4 drive avoiding a full system renovation, with whose general performance I am satisfied with and, at the same time, to take advantage of some good prices of Gen 4 units in local stores.

 

Obviously, at no time do I intend that the Gen 4 units work as such in Gen 3 sockets.