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PCIe 4.0 will be twice as fast as today's slots
We've been hearing about a new PCIe specification since 2011. That seems like an eon ago in technology time. PCI-SIG, the community responsible for maintaining these peripheral input/output (I/O) specifications has finally released the specs for PCI Express 4.0, which will give PCs twice the throughput speed (up to 16 GT/s) as previous 3.0 connections while maintaining backward compatibility as well.
PCIe 4.0 inches towards reality, hits 16 gigatransfers per second (that's a thing, right?)
Don't get too excited just yet, but PCIe 4.0 is coming. PCI-SIG, the body that governs the standard, has announced the next evolution of the interface, which should start popping up in servers, desktops, laptops and even tablets around 2015. Sadly, details are pretty slim on the slot -- final specs aren't expected to be announced before 2014. All we know is that PCIe 4.0 will be able to perform 16 gigatransfers per second (GT/s), which tells us only slightly more than jack squat. It simply means that a PCIe 4.0 card will be capable of transferring 16 billion discrete chunks of data per second, twice that of PCIe 3.0. What that doesn't tell us though, is the size of those chunks. If they're the same size, 4.0 will provide double the current bit rate of 1 GB/s per-lane. If, for some reason, the channel width were halved there would be no speed increase -- but we seriously doubt that's the case. So, will we be looking at 32 GB/s PCIe 4.0 x16 GPUs in a few years? That is a definite maybe.
PCI Express cables could take us to 32Gbps speeds by 2013
Thought Thunderbolt was the only superfast interconnect in town? Well, it is and will be for a little while yet, but the PCI Special Interest Group has just held its annual meeting and developer conference in California, where plans for a 32Gbps PCIe cable were revealed. Details are still fluid on precisely what such a connector would look like and do, but the expectation is that it'll be built out of copper wire, will be flatter and thinner than Thunderbolt's rotund construction, and will be able to channel power as well as data through to devices up to 10 feet (3m) away. Targeting consumer applications, and extra skinny tablets and laptops in particular, this cabled variety of PCI Express will start off based on the 3.0 spec in 2013, but will then move on from there to PCI Express 4.0 and, potentially, optical data conveyance. Oh yes, PCIe 4.0 also got announced by the PCI SIG, though that's at least four years away at this point -- no need to sweat about having it in your next motherboard, not yet anyway.
PCI Express 3.0 specification formally delayed, products pushed to 2011
We've been enjoying (or just dealing with, depending on perspective) PCI Express 2.0 since early 2007, and it now looks as if we may still be utilizing said protocol come early 2011. Way back in June of '08, we began to hear whispers that the next iteration of the technology would be finalized by the end of this year, but now the PCI SIG has formally delayed the release of the specification until the second quarter of 2010. What does that mean for the consumer? Try coping with the fact that you won't see a PCIe 3.0 product until 2011. As the story goes, the delay was needed in order to "maintain backward compatibility with current PCI Express standards," and while the technical details of all that may interest some, it's the awfully unfortunate setback that's most notable here. But hey, at least all those PCIe 1.0 cards that are still totally relevant will work with your next (next-next?) PC![Via Reg Hardware]
PCI Express 3.0 details surface
PCI 2.0's doubled-up speed boost was something to celebrate, but think again if you're looking for such a bump with PCI Express 3.0. The PCI SIG started eking out some details about the new standards, and as of now it looks like PCI express 3.0 will see transfers speeds of 8-gigatransfers per second, compared to 2.0's 5.0-gigatransfers per second. Channel width and transfer protocol will ultimately determine the amount of information transferred, of course, so the new standard could have some tricks up its sleeves. The good news is that PCI Express 3.0 will use the same connector and will be backwards-compatible with 2.0. PCI Express' specifications should be complete in 2009 with a rollout in 2010, so don't go stressing about your motherboard's I/O options just yet.
