Amd radeon rx 5700 xt9/21/2023 ![]() ![]() ![]() Update: The Radeon RX 5700 series only supports DX12 and Vulkan’s explicit multi-GPU, not CrossFire for DX9, DX10, or DX11, per TechPowerUp. Herkelman said any benefits would be “corner case, game-dependent, and situational.” He said he wouldn’t recommend people buy into PCIe 4.0 just for potential improvements to multi-GPU gaming. I’d wondered whether the move to PCIe 4.0 could benefit performance in CrossFire setups, because those need to tap into a narrower x8 connection. Modern graphics cards simply don’t saturate the PCIe 3.0 x16 interface typically used in most gaming PCs. One of the flagship features of the Radeon RX 5700 series, PCIe 4.0 support, doesn’t-at least in normal gaming scenarios. AMDįaster, more efficient clocks and faster, more efficient memory both provide tangible benefits to PC gamers. “We will continue to support that in markets that make sense.” For these Radeon RX 5700 cards in particular, GDDR6 lets AMD “hit better price points still get great performance” while being more widely adopted than HBM2, whose pricing he called “volatile.” The power-hungry Vega cards needed HBM2’s energy efficiency, but AMD says GDDR6 offers 60-percent-improved performance per watt versus GDDR5. “We are not ruling out HBM2 in our roadmap,” Herkelman told me in our Full Nerd interview. The Navi cards we’re reviewing today hit 448GB/second of memory bandwidth thanks to their 8GB capacity and 256-bit bus. It’s more of a lateral move performance-wise for AMD, because HBM2’s 2,048-bit wide memory interface allowed for excellent memory bandwidth speeds. AMD switched to traditional GDDR6 memory for these new cards, matching Nvidia’s current GeForce lineup.įor Nvidia, the switch from GDDR5 to GDDR6 provided enormous throughput benefit thanks to GDDR6’s much faster speeds. The Radeon VII and Vega GPUs utilized second-generation high-bandwidth memory stacks, continuing the HBM push that AMD spearheaded with the Fury X in 2015. The Radeon RX 5700 and RX 5700 XT also change the underlying memory configuration. If you want an insightful yet understandable explanation of the major RDNA architecture changes and have 23 minutes to spare, I highly recommend watching the Gamers Nexus interview with technology analyst David Kanter embedded below. We’re not going to get into the weeds of redesigned cache hierarchies and SIMD Wave cycles here. ![]() These new graphics cards perform tasks differently from their predecessors at a fundamental level. Compared to AMD’s long-lasting GCN architecture (which Vega is based on), the new RDNA architecture introduces several radical changes to the underlying GPU design, unleashing significant hardware-level overhauls to everything from the cache to the graphics engine to the compute units themselves. While that table provides a helpful overview, note that you can not simply compare the number of compute units and stream processors between the Vega GPUs and the “Navi” GPUs in the Radeon RX 5700 series. (Radeon boss Scott Herkelman confirmed that Vega will be disappearing in The Full Nerd interview embedded above.) AMD Here’s an AMD-supplied list of technological specifications for the Radeon RX 5700 and Radeon RX 5700 XT, alongside the same stats for the Radeon RX Vega GPUs they’re replacing in AMD’s product stack. Let’s kick things off by examining the hardware, before delving into some new software features later. ![]()
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