NVIDIA RTX 40 series thread

[Toy Machine]

Couldn't care about clean it looked honestly (the connector). Literal function over form, don't know how world class design team and engineers decided this was anything remotely clever to do. I keep my 40 series well under 400w at any given point. I literally only ever hit 400w+ when testing things for short durations (i.e. like a new game on max just to see what it looks like for 5-10mins).

They really should recall the entire series and go back to 8-pin the shit but I doubt they'd have the ballas to do so. They'll probably rather fix it in the next line of products if anything xD

 

[Oj0]

Anyway, NVIDIA should still go back to 8 pins anyway. 3 or 4. The connector is more trouble than its worth.

They really should recall the entire series and go back to 8-pin the shit but I doubt they'd have the ballas to do so.

I suspect it's more to do with PCI-SIG having a maximum allowed TGP of 300w (150w (8-pin PCIe connector) + 75w (6-pin PCIe connector) + 75w (CEM connector)), else you can't use PCIe branding. Custom cards can exceed this, but reference cards need to fall within this limit. You can have 20 8-pin PCIe power connectors, but TGP can't exceed 300w continuous.

It's within this document, but access to it costs US$ 4,000 per year:

PCI-SIG - Login

members.pcisig.com

Once you exceed that, the spec requires the use of the 12VHPWR connector.

 

[Nyt Ryda]

I suspect it's more to do with PCI-SIG having a maximum allowed TGP of 300w (150w (8-pin PCIe connector) + 75w (6-pin PCIe connector) + 75w (CEM connector)), else you can't use PCIe branding. Custom cards can exceed this, but reference cards need to fall within this limit. You can have 20 8-pin PCIe power connectors, but TGP can't exceed 300w continuous.

It's within this document, but access to it costs US$ 4,000 per year:

PCI-SIG - Login

members.pcisig.com

Once you exceed that, the spec requires the use of the 12VHPWR connector.

Thanks for this, this makes sense. That is probably why the 7900XT has a max TGP of 300w and the plans for an XTX were not feasible too.

Edit : Wait hang on, the 7900XTX did come out. It was the 6900XTX which never launched.
The 7900XTX has a 355w TDP with 2x8 pins, and there seems to be a reference board too - confusing.

 

[Fluke]

'default' being the non-OC VBIOS... so I wouldn't say the OC VBIOS isn't default.

I have definitely seen above 600w on my 4090 Strix OC

 

[Oj0]

Thanks for this, this makes sense. That is probably why the 7900XT has a max TGP of 300w and the plans for an XTX were not feasible too.

Edit : Wait hang on, the 7900XTX did come out. It was the 6900XTX which never launched.
The 7900XTX has a 355w TDP with 2x8 pins, and there seems to be a reference board too - confusing.

Yup, I’m aware, which is why I merely suspect rather than know. There are possibly excursion limits whereby the TGP can be exceeded by a certain amount for certain durations, but even then it’s reaching 350w+ in gaming with spikes exceeding 450w. I’m not paying $ 4k to check on a suspicion though

 

[Nyt Ryda]

'default' being the non-OC VBIOS... so I wouldn't say the OC VBIOS isn't default.

View attachment 62140

I have definitely seen above 600w on my 4090 Strix OC

So basically all Nvidia has to do is hard lock it to 450w so that silly 600w modes die. Problem solved for the RTX 50 series lol.

 

[RaptorChris]

And I just bought a 4070 xD

It seems to be a 4090 specific issue I believe, the 4080 downwards actually draws very little power

 

[Fluke]

So basically all Nvidia has to do is hard lock it to 450w so that silly 600w modes die. Problem solved for the RTX 50 series lol.

Every product these days seems to be tuned way beyond the expected efficiency curve. AMD, Intel, Nvidia, ATI AMD GPUs all benefit a lot from undervolting and underclocking when you look at them through a performance:watt perspective.

Undervolting and underclocking my 4090 to consume 'only' the same power as my 1080 Ti ftw3 (~300w) but not really getting as much as expected reduced performance was kinda funny.

All that being said, for GPUs, I tend to just run them with the OC VBIOS switch and leave everything default. Whole system pulls near 800-900w from the wall under peak load... which is... fine........ at least we have cheap (and clean) power here in Canada

 

[thecurto]

RTX 4070 SUPER - $599
RTX 4070 Ti SUPER - $799
RTX 4080 SUPER - $999

The regular 4070 Ti and 4080 have been discontinued and the 4070 is getting a $50 price cut.

The midrange GPU segment just got a whole lot more competitive which is great news!