OCZ Z-Drive R4 RM1616's caught breaking speed limit at 13GB/s and 100k IOPS

[samebradshaw]

How is it that you can get 13 GB/s of throughput when the bus bandwidth available to two pcie 2.0 x8 cards is only 8 GB/s half duplex? Are you doing host side decompression?

[TheKarlsruheprotest]

@samebradshaw RAID0

[samebradshaw]

@TheKarlsruheprotest You don't understand the question. They are either overclocking the pcie bus, doing host side decompression in order to squeeze more effective bandwidth out of the system, or something else. In either situation, the results are not generally replicable.

[MarTuv93]

@samebradshaw

The cards has an x8 connector, and they are in RAID0. A single x8 slot theoretically supports up to 8GB/s. Add the two slots together and you end up with a maximum bandwidth of 16GB/s.

[hl2ep3]

@MarTuv93 I understand what you're saying. PCI-E 3.0 is 8GB/s on a 3.0 x8 slot. but the cards are PCI-E 2.0 spec, PCI-E 2.0 is 4GB/s on an x8 slot. so either they can use the PCI-E 3.0 bandwidth with a 2.0 Spec connection then i have to re-learn all this. like putting a USB 2.0 flash drive in a USB 3.0 port won't go at 5Gbit/s, it'l still go 2.0 speeds. but a PCI-E 2.0 card in a 3.0 slot all of a sudden allows it to go at 3.0 speeds.. huh :|

[MarTuv93]

@hl2ep3

No PCIe 2.0 supports 1GB/s of bandwidth per lane. PCIe 3.0 is 2GB/s of bandwidth. Look it up on pcisig dot com if you don't believe me.

[samebradshaw]

@MarTuv93 Yes, but they are doing 100% reads per the IOMeter screen. That means they do not get the full duplex bandwidth of pcie. Looking at pictures of the RM1616 from elsewhere makes me think it is actually a x16 card, in which case these numbers are reasonable. That would also be consistent with their nomenclature: RM88 is 8 sandforce controllers and x8 pcie. RM1616 is 16 sandforce controllers and *likely* x16, despite the card on top of the system indicating x8.

[bigdima3]

lol, getting close to DDR3 RAM speeds.

[kevinsmammaxd]

show windows boot!

[prankmypants]

yeah il take 4 and raid em to get 52GB/s and then add them to my ivy bridge extreme

[wixx95]

SH!T 13GB/s !!!!

[murder00redrum]

Wow...

[Hackslashs0r]

and again nonsense from ocz congrats!

[epeets]

Sweet Jesus. Why do you need that much speed! I would do it if I won the lotto though. Lol

[IROHINE]

Damn it, now I rethink and save for my new SSD setup.

[osx86touch]

My 1 GB/s Agility 3 RAID 0 just got raped.

[h4xmode]

EL OH EL.