Yesterday we were able to present the first tests of three models of the GeForce RTX 3060 and the currently cheapest amp model has also gone on sale. At the same time, Resizable BAR (rBAR) was launched at NVIDIA. The PCI-Express Resizable BAR function, together with the GeForce 461.72 in combination with the GeForce RTX 3060, must now show where there are advantages and where not.
GeForce RTX 3060 with Resizable BAR Review
NVIDIA plans to implement Resizable BAR as soon as possible have been known for some time. We have also reported several times on how it works. The AMD had implemented the function as a Smart Access Memory for the current Radeon RX 6000 series and thus cleverly marketed it, so NVIDIA ultimately forced a similar implementation.
According to NVIDIA, Resizable BAR is now available for all AMD processors based on the Zen 3 architecture as well as Intel processors of the 10th and 11th core generation. The requirements for the chipsets are a mainboard with a 400 series chipset (which also support the Ryzen 5000 processors) or a 500 series chipset. At Intel these are currently the Z490, H470, B460 and H410. Mainboard manufacturers such as ASUS, ASRock, EVGA, Gigabyte and MSI have already announced or already published corresponding BIOS updates.
However, there are also motherboard manufacturers who have released BIOS versions for their boards that make Resizable BAR usable for Ryzen 3000 processors. At least the corresponding option appears here (if it was not already available before). But whether rBAR really works, you have to look in detail. This can be controlled with both AMD and NVIDIA.
GeForce RTX 3060 with Resizable BAR Test
We tested Resizable BAR on the basis of our graphics card test system. With an Intel Core i9-10900K was used on an MSI MAG Z490 Tomahawk with the current BIOS 7C80v17. The platform thus supports rBAR and also mentions this in the details of this BIOS: “Support Re-size BAR function to enhance GPU performance including the Nvidia GeForce RTX 3000 series and others.” The ASUS ROG Strix GeForce RTX 3060 was used as the card.
The current GeForce 461.72 offers a performance boost thanks to Resizable BAR in the following games:
- Assassin’s Creed Valhalla
- Battlefield V
- Borderlands 3
- Forza Horizon 4
- Gears 5
- Metro Exodus
- Red Dead Redemption 2
- Watch Dogs: Legion
Specifically, we have now looked at Battlefield V, Metro Exodus, Red Dead Redemption 2 and Watch Dogs: Legion. The biggest hurdle is likely to be a current VBIOS of the graphics card. The GeForce RTX 3060 is able to use Resizable BAR right from the start. NVIDIA itself wants to deliver a VBIOS update for the Founders Edition cards available so far. This should be the case later in March. The partners have to do the same for their custom models so that they can support Resizable BAR. Until then there will probably also be another driver that extends this function to models other than the GeForce RTX 3060.
In order to be able to use the Resizable BAR, it must be activated in the BIOS. The above screenshots show the associated options with the names “Above 4G memory / Crypto Currency mining” and “Re-Size BAR Support”. Both of these must be activated.
In the system information of the NVIDIA Control Panel, under “Resizable BAR” you can check whether rBAR is also active. With AMD you have to go to the device manager, there on the graphics card and in the resources a large memory range has to be displayed.
GeForce RTX 3060 with Resizable BAR Initial Assessment
The first tests with the Radeon RX 6800 XT and Resizable BAR have already shown that not every application benefits from this technology and that it therefore depends on which game is used and which resolution is selected here. A Watch Dogs: Legion seems to benefit from six to eight percent across the board and regardless of the resolution. However, this can only be stated here in this form for the average FPS. The 99th percentiles remain almost identical.
In Red Dead Redemption 2, the average FPS remain almost identical, but the Min-FPS in the form of the 99th percentile increases by up to 10%. Metro: Exodus has a plus for both values, especially in 1080p and 1440p, while there are hardly any improvements in 4K. Battlefield V shows between two and seven percent better average FPS, but here, too, the plus is most evident in the 99th percentile.
Of course, we also tried other games with and without Resizable BAR, but apart from the usual fluctuations in the measurements, we were unable to determine any clear tendency. Sooner or later, Resizable BAR will be available for all graphics cards and the current platforms. There can be a negative impact on the performance in exceptional cases, but in principle this should not happen. The positive effect is currently limited to a few games and while AMD can use all cards of the current Radeon RX 6000 series with it, NVIDIA is still limited to the GeForce RTX 3060. It is not known whether AMD and NVIDIA will ever release rBAR for the previous generations, but it is unlikely.
So we have not yet included Resizable BAR as standard in the test course. We will do this when all cards, both from AMD and NVIDIA, are capable of doing this.