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Monday | January 18, 2021
Which power supply for a PC with RTX Ampere?

Which power supply for a PC with RTX Ampere?

The RTX 3080 will be presented during the day. The 3090 and 3070 will follow in the next few days. Nvidia has already released a lot of elements on its new cards, especially the TGP.

Far from us thinking that the figures communicated by Nvidia are not reliable, but from experience, we know that the values communicated are to be put in the low range. Indeed, in stress tests as in other specific situations, the consumption of the card is very often 20% higher than the announced figures. If some have ventured to give recommendations on the power supply / GPU pair, the figures are often relative different depending on the sources / tests.

This table from TechPowerup summarizes the situation well. As a reminder, the official TGP of the 2080Ti FE is 250W…

It is therefore obvious that the effective TGP of the 320W and 350W of the RTX 3080 and 3090 should logically pass the 400W mark.

Of course, these values are still increasing on the custom models even if Nvidia imposes, through the BIOS, some limitations not to exceed certain values.

The brand seems to be aware that there are many questions on the subject with its new Ampere range. The use of the Samsung “8Nm” process (which is actually a 10nm) does not allow them to make a miracle with the increase in size of the GPU.

In order to defuse these concerns, Nvidia has sent to a few hand-picked testers, a tool to measure the consumption of its cards, particularly at the PCIex port.

Nevertheless, the target of an RTX 3090 or even a custom RTX 3080 will be the ” power user “. The latter is not satisfied with an average piece of equipment around his graphics card. During our overclocking tests with an Intel 10980XE CPU (equipped with a simple 710 GT), the power consumption already exceeded 760W at 5Ghz.

In these conditions, the most optimistic people rub their hands and imagine a consumption peak… in the purchase of power supply. Here is a simple graph (for commercial use of course), which gives you an idea of the power supply needed for your future machine.

RTX 30xx Alim

In the next few days, we will proceed to do a lot of objective tests on the subject. But it seems however that the 1000W power supply will become more and more popular among those who want to optimize their configuration with an Ampere card…

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Edited by Calliers

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