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PCI-Express 4.0 to Double Bandwith and Allows for 300W Slot Power
Some info on the up and coming PCI-Express 4.0 slot is spotted on the web. now it's not that you guys would need faster PCI-Express slots as really, you are hardly utilizing PCI-Express 3.0 (or even gen 2.0). But interesting is that the new slot will allow for 300 Watt slot power, that's a massive increase over 75 Watt.
Update: It was indicated that the motherboard slot would be capable of delivering 300 Watts through the PCI-Express slot, this is erroneous as it will remain to be 75 Watt, much like it is these days. More info here.
--
The news reaches us through techpowerup, who stumbled into it at TomsHardware. But yeah, basically bandwidth is at 16 GT/s per PCI-Express lane which is double that of the 8 GT/s on the current PCI-Express gen 3.0 specification.
| PCIe Version | Line Code | Transfer Rate | x1 Bandwidth | x4 | x8 | x16 |
|---|---|---|---|---|---|---|
| 1.0 | 8b/10b | 2.5 GT/s | 250 MB/s | 1 GB/s | 2 GB/s | 4 GB/s |
| 2.0 | 8b/10b | 5 GT/s | 500 MB/s | 2 GB/s | 4 GB/s | 8 GB/s |
| 3.0 | 128b/130b | 8 GT/s | 984.6 MB/s | 3.938 GB/s | 7.877 GB/s | 15.754 GB/s |
| 4.0 | 128b/130b | 16 GT/s | 1.969 GB/s | 7.877 GB/s | 15.754 GB/s | 31.508 GB/s |
If you multiply then 16 GT/s per lane bandwidth translates into 1.97 GB/s for x1 devices, 7.87 GB/s for x4, 15.75 GB/s for x8, and 31.5 GB/s for x16 devices. PCI Express has moved well beyond video cards. Currently, nearly every IO device routes through PCIe to send signals back to the CPU. We expect to see rapid adoption of the new standard for storage and networking products. NVMe SSDs using PCIe 3.0 x4 recently reached the usable limit of the interface.
As satted the 4x increase in power delivery I find to be very interesting as it actually might eliminate cables going towards graphics cards (of course we'd all need a PCIe Gen 4.0 motherboard which will never happen).
Check the slides below for a good read.
AMD Gives Statement on the PCI-Express Overcurrent Problems - 07/02/2016 11:37 AM
AMd issued a small statement on the PCI-Express Overcurrent Issues mentioned on the web. The Radeon RX 480 is using more than 75 Watts over the PCi-Express bus. Here that statement: "We cont...
ASUS ROG RAIDR PCI-Express SSD - 04/18/2013 07:56 AM
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Fusion-io Outs 1.6TB ioFX PCI-Express SSD - 04/10/2013 08:43 AM
Fusion-io has recently announced a new storage capacity to its ioFX PCI-Express SSD line-up by announcing the 1.6TB model. Designed to meet the needs of small to medium-sized businesses, enterprises c...
ASUS ROG RAIDR PCI-Express SSD - 01/08/2013 10:30 AM
ASUS unverils the Republic of Gamers (ROG) RAIDR, a PCI-Express SSD that uses a number of mSATA SSD sub-units in an internal RAID 0 configuration that's abstract to the host. As it goes with every ot...
Radeon HD 7000 Series PCI-Express 3.0 Compliant - 07/18/2011 11:00 AM
Soon you will see a new wave of motherboards getting PCIE 3.0 support but well, there's nothing out there utilizing all that extra bandwith and power spec. Well, good news, AMD's next generation of gr...
nick0323
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#5324674 Posted on: 08/22/2016 02:10 PM
Yeah happy with my mobo/cpu - rock solid stability and performance, for gaming obvs.
Yeah happy with my mobo/cpu - rock solid stability and performance, for gaming obvs.
JonasBeckman
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#5324685 Posted on: 08/22/2016 02:31 PM
Is such a high bandwidth really necessary? Even a 2.0 is not bottlenecking any card.
I would understand if multi-gpu is the future but users seems moving away from that.
PCI-E SSD I guess?
(The M.2 or what it's called featured on more recent motherboards might be better though and not you know block other components relying on PCI-E slots but eh I guess newer motherboards offer a bit more choice what with more lanes or how it's called and better spacing for the larger board models.)
Is such a high bandwidth really necessary? Even a 2.0 is not bottlenecking any card.
I would understand if multi-gpu is the future but users seems moving away from that.
PCI-E SSD I guess?
(The M.2 or what it's called featured on more recent motherboards might be better though and not you know block other components relying on PCI-E slots but eh I guess newer motherboards offer a bit more choice what with more lanes or how it's called and better spacing for the larger board models.)
Evildead666
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#5324692 Posted on: 08/22/2016 02:56 PM
Am I missing the slide that mentions about the 300W via the slot ?
I don't see it in the collection ?
Am I missing the slide that mentions about the 300W via the slot ?
I don't see it in the collection ?
AlmondMan
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Joined: 2007-09-03
Senior Member
Posts: 965
Joined: 2007-09-03
#5324697 Posted on: 08/22/2016 03:06 PM
AMD was really just ahead of the times with RX480!
AMD was really just ahead of the times with RX480!
Click here to post a comment for this news story on the message forum.
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Is such a high bandwidth really necessary? Even a 2.0 is not bottlenecking any card.
I would understand if multi-gpu is the future but users seems moving away from that.
For gaming purposes PCI-E 2.0 is still more than sufficient but for Compute purposes more bandwidth is required. It may be surprising to know that even a HD 7970 had higher compute performance when running on PCI-E 3.0 compared to running on PCI-E 2.0.
http://www.anandtech.com/show/5261/amd-radeon-hd-7970-review/10