[TomsHW] PCIe 4.0 - 32GB/sec over x16, 300-500W slot power

[Ken g6]

Honestly, no other component in computers today (for mainstream users) requires extra power connectors.

CPUs do. Drives do.

 

[Ajay]

Hmm, this would be cool if mobos sported dual 24pin connectors instead of a myriad on-board PCI-E power connectors.

 

[Ken g6]

Hmm, this would be cool if mobos sported dual 24pin connectors instead of a myriad on-board PCI-E power connectors.

Another cool idea would be if motherboards had 6/8-pin outputs to plug into older video cards.

 

[boozzer]

"old standard psus" means all psus sold as of today.

Once again I ask you,

Could you name at least one gain besides your argument that I don't believe it stands since you already got the "modular psu" product adopted by all the major psu manufacturers.
Power gets switched to the motherboard. This not cost free.

EDIT:
Just to make myself clear.

I do not stand against tech progress!

Both power and cost gets switched to the motherboard. I do not know who could gain something out of this. Maybe motherboard manufacturers or psu manufacturers, or both due to transferring cost to their side, but not oems or customers.

This is not an engineering master piece! It has nothing to do do with tech progress.
It sounds more like a political decision.

modular psus cost a hell of alot more than standard psus. it is super premium. that totally destroys the cheap chinese psus argument people were having in this thread.

your turn.

 

[VirtualLarry]

modular psus cost a hell of alot more than standard psus. it is super premium.

When even RaidMax can make a 735W modular 80Plus Bronze PSU, on sale for $40-50, that's not that "premium".

Btw, did whomever came out with this spec, work on the SATA-Express spec? Inquiring minds want to know...

 

[Shivansps]

It just cant be done /period 300W will melt the ATX plug, 2.0 and 3.0 also supported more than 75W it was never used because it cant be applied. /period

 

[Phynaz]

And this somehow makes you not wrong...? Please explain.

*grabs popcorn*

Munch away.

 

[VirtualLarry]

It just cant be done /period 300W will melt the ATX plug, 2.0 and 3.0 also supported more than 75W it was never used because it cant be applied. /period

In real-world, practical terms, I think that this is the correct answer. Unless there is also a new corresponding ATX power spec (moving towards pure 12V delivery from the PSU), then I don't think this new PCI-E power spec really means much.

 

[boozzer]

When even RaidMax can make a 735W modular 80Plus Bronze PSU, on sale for $40-50, that's not that "premium".

Btw, did whomever came out with this spec, work on the SATA-Express spec? Inquiring minds want to know...

well color me surprised. I honestly thought modular = 80+ for any reasonable wattage(600+).

 

[exar333]

CPUs do. Drives do.

The CPU I suppose, but to that's rather new (last 10 years maybe?) It would be ideal if the MB and directly connected devices (excluding drives, etc. that don't connect directly to slot/docket) had a single power source. 24-pin mb cable + 4/8-pin CPU + extra MB molex + GPU power is rediculous.

 

[moonbogg]

Just like the good old days. We didn't always have these stupid cables. I remember when the first one came out. I was like, "Oh crap, that's beast. It needs moar powa!"

 

[Carfax83]

Great. I'm not updating my platform until PCI-e 4.0 becomes available, which likely won't be until Cannonlake in 2017 and Kaby Lake-E in 2018. But that's not to say that I think it's going to have a huge performance impact or anything. Current GPUs aren't limited by PCI-E 3.0 in single card mode, and I doubt Volta and whatever AMD has cooking up will be limited by PCI-E 4.0 either..

 

[hrga225]

It just cant be done /period 300W will melt the ATX plug, 2.0 and 3.0 also supported more than 75W it was never used because it cant be applied. /period

Wrong beyond belief.
Current travels on surface of conductors.That is why you have traces on boards,to increase area,so that higher current can go through.One can make flat wire(trace) 100 microns thick that can carry 1 kA and tens of kW of power if it wide enough.
So please stop talking rubish.

 

[siriuus]

I dont see a reason why a few more 12v pins couldnt be added to a new atx power connector version.. or get rid of all the other voltages, let the motherboard do the work. All these extra power cables are getting ridiculous

 

[ShintaiDK]

I dont see a reason why a few more 12v pins couldnt be added to a new atx power connector version.. or get rid of all the other voltages, let the motherboard do the work. All these extra power cables are getting ridiculous

Custom servers tend to be 12V only. It would be nice to get a cleanup on the PC in that regard.

 

[TheRyuu]

Great. I'm not updating my platform until PCI-e 4.0 becomes available, which likely won't be until Cannonlake in 2017 and Kaby Lake-E in 2018. But that's not to say that I think it's going to have a huge performance impact or anything. Current GPUs aren't limited by PCI-E 3.0 in single card mode, and I doubt Volta and whatever AMD has cooking up will be limited by PCI-E 4.0 either..

Considering how long it took to see PCIe 3.0 boards you're probably looking at 2018.

There's no way you can deliver these power requirements on the current ATX connector (we have 4/8 pin CPU power connectors already as well). IIRC only 2 out of the 24 wires deliver 12V. There's still time to see how the situation will develop on motherboards so endless speculation is kind of silly at this point.

 

[miklos_akos]

While most IT tech products come from the US, non-us US markets don't reflect the same US prices.

Yeah, you're right. Here in Hungary a reasonable PSU starts at 10-20 thousand Hungarian Forints which is approx. 32-64 Euros. The same goes with Graphics Cards, Mobos etc.

 

[Senpuu]

Munch away.

Is it so hard to simply admit that you're wrong? Even fringe, super-enthusiast scenarios will never see hundreds of amps running through the mobo.

 

[Dribble]

Tbh I'd prefer to have to run a cable from psu straight to gpu (where it gets properly connected via a plug designed to carry a lot of power). This change would effectively mean me still having to run another cable into the motherboard, which would then have to transfer it through the board and out along the pci connectors which don't have anything like as good a connection as a power socket.

I really don't see the advantage, nor do I see why we'd want to make motherboard specs revolve around supporting 300W gpu's when most pc's don't even have a discrete gpu. They'd have to build in all that expensive power delivery on any motherboard with a pci slot (i.e. all of them) even though most will never need it.

 

[Phynaz]

There's no way you can deliver these power requirements on the current ATX connector (we have 4/8 pin CPU power connectors already as well). IIRC only 2 out of the 24 wires deliver 12V.

 

[Phynaz]

Is it so hard to simply admit that you're wrong? Even fringe, super-enthusiast scenarios will never see hundreds of amps running through the mobo.

How am I wrong? It's a specification and simple multiplication. If the speicification calls for 300w-500w per slot, and you have three or four slots, that's hundreds of amps.

You don't think quad Fury GPU's draw hundreds of amps? What's the point of 1200w+ power supplies then?

Perhaps you would have been better served to have read the article and getting the facts before telling me I'm wrong.

the vice president of PCI SIG told the site that a PCIe 4.0 slot could provide anywhere from 300W to 400W or 500W

 

[nathanddrews]

There's not much point in arguing who's wrong until there's actually a proof of concept with a working GPU capable of receiving that much power from the slot.

 

[Jaskalas]

Step1: Design 300-500 watt spec.
Step2: Watch it cause issues.
Step3: External GPUs!

Yeah?

 

[exar333]

I dont see a reason why a few more 12v pins couldnt be added to a new atx power connector version.. or get rid of all the other voltages, let the motherboard do the work. All these extra power cables are getting ridiculous

Custom servers tend to be 12V only. It would be nice to get a cleanup on the PC in that regard.

Totally agree. Would cut down a LOT on cable clutter, would help considerably for SFF builds and make the whole process much more elegant. 20 years ago, you had a single power cable to your MB and then to any external/internal drives.

Imagine using a M.2 drive (no external power needed) on a MB with a single power cable from the PSU. Would be amazing....you can freely add a new GPU and still have a very simple cable system.

 

[thetuna]

Wrong beyond belief.
Current travels on surface of conductors.That is why you have traces on boards,to increase area,so that higher current can go through.One can make flat wire(trace) 100 microns thick that can carry 1 kA and tens of kW of power if it wide enough.
So please stop talking rubish.

What? I don't even...
No, you are the one who is wrong.
Flattening a wire does not increase its current carrying capacity.