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Up to 600 watts of power for graphics cards with the new PCIe 5.0 power connector – Is NVIDIA’s RTX 3090 Ti* the dawn of a new era? | Exclusive

With up to three 8-pin connectors for current high-end graphics cards, the result is a cable-connector tangle that is slowly but surely reaching the limits of what is acceptable and sensible. The old 6+2 Molex connectors in this form are now technically simply obsolete. The 12-pin Microfit connector on NVIDIA’s Founders Edition was ultimately just a transition and owed to the “clear design” of the cards – it does not define a new standard, however, but remains a proprietary stopgap solution.

The 16-pin Microfit connector for the upcoming GeForce RTX 3090 Ti* that has been rumored on some websites does exist in the Molex universe, but it certainly won’t be standard on the whole cards. What NVIDIA will eventually put on the Founders Edition is still a secret, but that there will be a completely new plug is set and certain. Besides the power supply manufacturers I contacted, several graphics card manufacturers have already expressed some relief that the PCI SIG has also defined a new “High Power Connector” (H+) as standard within the specification for the new PCIe 5.0 standard. I have colored this new connector as a drawing for you myself:

The PCI Express 12VHPWR connector

Now let’s get into the details of the new power connection and cable assignment. This connector design was specifically defined to support cards with up to 600 watts of power consumption. This marks a new milestone, because in the end a current 8-pin connector is just a simple 6-pin connector, whose two sense pins should also only ensure that only those connectors are accepted, whose cables have been designed accordingly powerful.

The new 12VHPWR connector therefore does not fit the PCI Express 2×3 and 2×4 Auxiliary Power connectors. The power supply pins of the 12VHPWR connector have a spacing of only 3.0 mm, while the contacts in the older 2×3 connector (6 pin) and 2×4 connector (6+2 pin) have a larger spacing of 4.2 mm. Figure 9-1 shows the unplugged 12VHPWR add-in card connector with through-hole. Twelve large contacts carry the power rail (2×6) and the four smaller contacts below are for the sideband signals.

Now let’s take a look at the technical drawing. We now also see why this new plug can supply so much more current without burning out right away. The 12VHPWR power connector provides up to 55A of continuous current to power the add-in card via a 12V power rail with a maximum power of 600W. The specifications to achieve this plug power are quite high. Let’s look at the drawing first:

The PCI SIG specifies a pin current capability (excluding sideband contacts) of 9.2 A per pin/position with a limit of 30 °C T-rise above ambient temperature at + 12 VDC with all twelve contacts energized. This results in 55.2 amps in one direction for the 12 volt power rail, or an even 662.4 watts. Of course, tolerances and safety deductions are still taken into account here in the total of just over 11 percent, so that in the end 600 watts can still be safely guaranteed

The connector body shall have a labeled or stamped H+ sign to indicate 9.2 A per pin (or greater) support. The approximate location of the mark on the 12VHPWR (R/A) right angle PCB strip can be seen in the drawing at the top. And to ensure that nothing slips out unintentionally, the inserted plug also has a locking mechanism that must be able to withstand at least 45.00 N when the plug is pulled axially.

What does all this mean for the graphics cards? The effort for sockets and plugs will be reduced enormously. In the future, a single, standardized plug will suffice for all cards here, as long as they need an additional supply connection and do not exceed a power consumption of 600 watts. It will significantly simplify the board layout and mechanical design, and this step is also long overdue. NVIDIA is the first to move forward here and will probably also push through the specifications for PCIe 5.0. However, it is still unclear whether the rumored RTX 3090 Ti will also support PCIe 5.0 on the data connector.

 

Bad times for cable modders?

The availability of the individual components should certainly be available for the circle of enthusiasts in the foreseeable future. However, according to one manufacturer, the processing is somewhat more difficult than with the simple Molex connectors. As a customer you will also have to pay attention to the correct cable cross-sections, but not only. With regard to the current carrying capacity of its individual cores, other factors come into play in addition to the pure cable cross-section.

In addition to the material used, the variants with different numbers of individual strands are also of interest here. The more individual strands are used, the thinner the cross-section of the individual conductors. This makes the cable much more flexible and therefore easier to lay. However, this also increases the electrical resistance and in turn reduces the maximum current carrying capacity. Below AWG 16 with a diameter of 1.29 mm (corresponds to a cross-section of approx. 1.31 mm²) I would not actually install anything. The 20 amperes of continuous load capacity possible here may seem completely overdimensioned at first glance, but you’ll definitely appreciate it in terms of efficiency. AWG 18 would also work if necessary, but then the material has to be really good. Cheap alloys are already ruled out here.

Let’s be surprised by the market, but the higher requirements (also with regard to the 4 additional signal lines) will separate the wheat from the chaff and many a hobby modder will probably prefer to look for another pastime or buy additional equipment.

Lade neue Kommentare

Case39

Urgestein

1,959 Kommentare 569 Likes

Neues Stecker gut. Bis zu 600 Watt für Graka, nicht gut.

Antwort Gefällt mir

Case39

Urgestein

1,959 Kommentare 569 Likes

@Igor Wallossek Kommentieren unter dem deutschen Artikel, leider nicht möglich.

Antwort Gefällt mir

v
vonXanten

Urgestein

528 Kommentare 159 Likes

Wie war das in einem anderen Thread hier, Netzteil mit Zukunftssicherheit wo zu ~1kW geraten wurde, das wirkt in Anbetracht dieses Steckers schon fast zu wenig? Zwei von den Steckern und die Karte darf mal geschmeidigt 1,2kW durchziehen...
Vielleicht sollten die Hersteller eine Version mit nachgeschalteten Pizzaofen/Backofen/Wärmetauscher für die Heizung anbieten (600W für die Einsteiger und >600W - 1200W für das Mittelfeld und Highend dann mit 3 Steckern wie bisher :cool: ).
Einfach nur krank, dachte wir gehen mal wieder in Richtung effiziente Hardware, aber das ist genau ein Signal in die andere Richtung...

Antwort Gefällt mir

RedF

Urgestein

1,751 Kommentare 692 Likes

Danke jezt habe ich verstanden was der blödsinn soll. 😅

Antwort Gefällt mir

HerrRossi

Urgestein

5,763 Kommentare 1,542 Likes

Vllt. bringt die neue 4050ti ohne Stromstecker ja die gleiche Leistung, die jetzt eine 3090 bringt :D Und wenn sie nicht gestorben sind...

Antwort 3 Likes

M
Morgrain

Veteran

122 Kommentare 80 Likes

Absolut bescheuert. Mein Arbeitszimmer heizt sich jetzt schon mit einem relativ sparsamen 5950x und einer runtergetakteten 3090 heftigst auf, im Sommer ist das ohne Klimaanlage quasi unerträglich. Wo soll die Reise bitte noch hingehen... soviel Watt heißt am Ende Hitze, die abgeführt werden muss... am liebsten wäre mir eine 4000er RTX Reihe, die außer ein paar neuen RT Cores exakt dieselbe Leistung wie die vorherige Generation bringt, aber dafür nur noch halb so viel verbraucht. Effizienz ist wichtig... und nicht nur wegen den Stromkosten...

Antwort Gefällt mir

Igor Wallossek

Format©

5,997 Kommentare 9,428 Likes

Das ist ein "bis zu" Anschluss, der alles abdecken soll, auch die 100-Watt-Karten. Ich finde es sogar nachhaltig, auf den ganzen Mehrfach-Buchsenkrempel mal zu verzichten :)

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LEIV

Urgestein

663 Kommentare 190 Likes

Mit heatpipes die Wärme zu nem Ofen leiten, und sich ne Pizza warm machen 🤣
Oder durch die abwärme Wasser zum Kochen bringen und mit ner kleinen Turbine etwas Energie zurück gewinnen 🤔

Antwort Gefällt mir

M
Morgrain

Veteran

122 Kommentare 80 Likes

Natürlich vollkommen richtig. Wie wir die Industrie kennen, wird aber aus "muh % mehr Leistung Marketing gogo" Gründen nahezu alles ausgereizt werden, was ausgereizt werden kann - einfach nur, um auf Papier toll auszusehen. Dass vor allem NVidia gerne auf die Brechstange setzt, GDDR6X husthust, um die letzten Prozentpünktchen zu erquetschen, ist ja auch keine neue Information mehr.

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v
vonXanten

Urgestein

528 Kommentare 159 Likes

Wie schon angemerkt wurde, die Industrie versteht da auch gern mal ein "Feuer Frei" darunter.
Finde es auch löblich endlich von diesen mehrfach Strippen mit 6 oder 8 Steckern wegzukommen, wird alles in allem dann einfacher zu verkabeln.
Schön wären mal wieder moderne Karten ohne zusätzlichen Anschluss, die 1030/RX550 sind ja alles andere als aktuell (Preis ist selbst da 🤬 )

Warten wir ab was kommt, ansonsten doch mal den GWS-Mann ansprechen zwecks Einbindung in die Heizungsanlage ;)

Antwort Gefällt mir

Danke für die Spende



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About the author

Igor Wallossek

Editor-in-chief and name-giver of igor'sLAB as the content successor of Tom's Hardware Germany, whose license was returned in June 2019 in order to better meet the qualitative demands of web content and challenges of new media such as YouTube with its own channel.

Computer nerd since 1983, audio freak since 1979 and pretty much open to anything with a plug or battery for over 50 years.

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