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[TH] PCI Express 4.0 Brings 16 GT/s And At Least 300 Watts At The Slot - Page 8

post #71 of 151
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Originally Posted by ToTheSun! View Post

AMD, once again, futureproofing with the RX 480! biggrin.gif
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"Advanced Micro Devices Radeon RX 480" biggrin.gif
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post #72 of 151
Finding more ways to burn old cards so people will upgrade.
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post #73 of 151
Quote:
Originally Posted by un-nefer View Post

Many motherboards added an additional molex input for PCI-E power when multiple gfx cards became popular to provide extra power delivery to the PCI-E slots, with most enthusiast mobos still including it.

I suspect with the introduction of PCI-E 4.0, they'll simply swap that out for an 8pin PCI-E plug (or two) instead, which would also mean PSU manufacturers wouldn't need to change their designs too much, if at all.

two 8pin would be the barest minimum, a single PCI-e 4.0 would entirely dominate that auxiliary power, then what of the rest of the PCI-e slots?
we're looking at multiple 8pin auxiliary power, if one thing can be seen from this, its the much thicker PCB traces and more serious noise isolation issues.
post #74 of 151
I like the idea of having GPU's with no extra power cables, would mean less stuffing around, cleaner rigs but at the same time 300w is a hell of a lot of power running through the board, not saying it cant be done, thicker tracers, thicker boards etc is easy.

But... 300w... though a motherboard... if the motherboard shorts either by water / coolant or some fault... depending on how many AMP's are running through... could potentially be dangerous, not only that it means more power for things to really go bang.

I hope they really think this through before doing it.
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post #75 of 151

Why are some of you claiming this would be hard? FX chips at 5GHz use about this much power (if not more) so all it would need is board makers not to skimp out on quality. Lower quality boards might still need the extra connectors on the video cards, just as some boards don't support certain CPU's that have 'high' power requirements.

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post #76 of 151
Quote:
Originally Posted by Liranan View Post

Why are some of you claiming this would be hard? FX chips at 5GHz use about this much power (if not more) so all it would need is board makers not to skimp out on quality. Lower quality boards might still need the extra connectors on the video cards, just as some boards don't support certain CPU's that have 'high' power requirements.

The main concern from my perspective would be in the connector instead of the motherboard. To achieve that sort of power density, I would think the connector would either need to change or there would need to be some sort of negotiation for higher voltage such as 48 volts.
post #77 of 151
Quote:
Originally Posted by ZealotKi11er View Post

Quote:
Originally Posted by BobiBolivia View Post

AMD has to include this in AM4 platform. Just sayin'.

Let them get PCIE 3.0 first. Also adding PCIE 4.0 is not that big of a deal if you have a good CPU. Zen+ will probably have PCIE 4.0.

They've had PCI-e 3.0 since Kavari.
Quote:
Originally Posted by epic1337 View Post

how are they going to provide 300W onto the PCI-e?

the current 24-pin (the extra 4pin to be exact) that provides the power to the current PCI-e slots can't provide 300W by itself, let alone to all PCI-e slots.

A bunch of PCI-e 6-pins. Right next to the 24-pin. It'll look like a giant IDE cable!
Quote:
Originally Posted by Imglidinhere View Post

Quote:
Originally Posted by epic1337 View Post

yeah, and imagine 4slots of PCI-e 4.0, 1200watts from where? and through the motherboard no less.

No current gen consumer setup today will draw more than 700w from the wall. There's simply no way you can do that feasibly unless you're benchmarking 4-way SLI or Crossfire with really really power hungry cards, and no one does that anyway.

This is merely providing the means by which you can transfer power through a slot. Hell, laptop MXM cards can handle up to around 150w from the board. o_o this isn't anything super shocking, more along the lines of: "About time. You're late."

Pretty much that, yea.
Quote:
Originally Posted by twitchyzero View Post

can Titan Pascal even saturate pci-e 2.0 x16? I'm not talking about someone with 3-4 video cards. Single card setup.

I'm all for progress but let's at least see a benefit from pci-e 3.0 first before creating new standards?

Must have missed the bit where these go in servers.

Anyway, you have a Z77 board. Wouldn't you like to be able to use X4 slots for your GPUs and still be able to plug in other things for a change since Intel refuses to let the little chips have more than 16 lanes? Maybe be able to put in more than one M.2 drive without losing the ability to do SLI?
Quote:
Originally Posted by epic1337 View Post

Quote:
Originally Posted by Imglidinhere View Post

No current gen consumer setup today will draw more than 700w from the wall. There's simply no way you can do that feasibly unless you're benchmarking 4-way SLI or Crossfire with really really power hungry cards, and no one does that anyway.

This is merely providing the means by which you can transfer power through a slot. Hell, laptop MXM cards can handle up to around 150w from the board. o_o this isn't anything super shocking, more along the lines of: "About time. You're late."

i was talking about worst case, e.g. quad CF 390X for example.
even on the most likely case, we'd have 1slot of PCI-e 4.0 (300W), and 3slots of PCI-e 3.0 (75W), thats 525W of theoretical power draw.

i'm saying that theres no power plug on the motherboard that can support such power draw.
even 300W alone, the existing 4pin auxiliary cable attached to the 24pin power won't supply that much.
unless they add multiple 8pin auxiliary power on the motherboard, or revise the 24pin altogether, they won't be going to supply 300W on a single PCI-e slot, let alone multiple slots.

I guarantee you the people at PCI-SIG figured that out all on their own.
Quote:
Originally Posted by Aussiejuggalo View Post

I like the idea of having GPU's with no extra power cables, would mean less stuffing around, cleaner rigs but at the same time 300w is a hell of a lot of power running through the board, not saying it cant be done, thicker tracers, thicker boards etc is easy.

But... 300w... though a motherboard... if the motherboard shorts either by water / coolant or some fault... depending on how many AMP's are running through... could potentially be dangerous, not only that it means more power for things to really go bang.

I hope they really think this through before doing it.

Again with acting as if 300w is a lot.

Do you have any idea the power levels "LN2" motherboards can already throw around? EPS 4-pin is literally 4 lines of 12v and the spec says they need to be capable of carrying 20 amps. That's 240w in a single 4-pin. An 8-pin adds another 50% for 360w. Some better boards have 8+4 or even 8+8 for 600w or 720w. And it isn't for show either. A well OC'd on water PD chip is capable of nearly maxing out a single EPS 8-pin.
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post #78 of 151
They must bring out motherboards with HBM memory on the PCB.One just pay more for motherboard with more memory.. thumb.gif
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post #79 of 151
Wait a tick, does this mean we can tweak the voltage to our GPU's through bios?

That's fantastic!
post #80 of 151
What's the big deal about plugging PCI-E cables into a motherboard? We already plug the PCI-E cables into a pcb (the GPU's pcb) without worrying about things catching on fire or melting traces, I'm not sure what the logic is behind the fear/skepticism.

With TDP's for CPU's and GPU's falling, I think this is awesome. My preference would be to have the connections at the bottom of the board like they do for "additional" PCI-E power inputs on boards currently.
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