There are other system requirements – not every motherboard chipset will play nice with Resizable BAR, and those that do might need a BIOS update - but Nvidia’s take on Resizable BAR isn’t as hardware-limited as AMD SAM. SAM requires both an AMD Ryzen CPU and a Radeon RX 6000 series GPU Resizable BAR needs an RTX 30 series GPU, but can work with both Ryzens and Intel 10th Gen chips or newer. But branding aside, SAM and Resizable BAR are one and the same: it’s not an AMD or Nvidia technology, but one built into the PCIe interface, and that’s been lurking unused in the interface’s specs since PCIe 3.0.Įven so, there are some differences. If any of that sounds familiar, it’s probably because AMD beat Nvidia to it with Smart Access Memory (SAM) in 2020. The idea is that once textures, shaders and geometry are loading in faster, games should run faster with higher frame rates. Resizable BAR essentially makes the entirety of the graphics frame buffer accessible to the CPU at once where it could once sip, it now guzzles.
Usually the CPU can only access this buffer in 256MB read blocks, which obviously isn’t very much when modern GPUs regularly have 8GB of video memory or much, much more. The reality is that you’re looking at very small performance gains in the best case - Resizable BAR is an interesting feature that could potentially improve, but doesn’t deliver the must-have performance gains of tech like DLSS.Īll gaming PCs produce an on-screen image by way of the CPU processing data – textures, shaders and the like – from the graphics card’s frame buffer. It certainly sounds great in theory: a quick method of unlocking greater potential from even the best graphics cards, and one that might require at most a couple of BIOS tweaks to get up and running. But what exactly is Resizable BAR, and assuming you have compatible hardware, is it really worth switching on? Earlier this year, Nvidia began enabling Resizable BAR on their GeForce RTX 30 series GPUs and laptops, with the promise of faster frame rates for no additional expense.
Nvidia’s updated Image Scaling isn’t the only way in which you can – on paper – give your graphics card performance a free boot up the backside.
0 kommentar(er)
