![]() ![]() This is an exciting feature, but it's a bit of a pain to enable. This can boost performance up to 10% in select titles. When you go to enable this, a window pops up warning you that messing with GPU tuners will void your warranty, but don't worry: as long as you don't do manual overclocking and stick with Rage Mode, AMD has assured us that Rage Mode won't void warranty.įor folks that have an AMD Ryzen 5000 processor, a 500-series AMD motherboard and either the Radeon RX 6800 or RX 6800 XT, Smart Access Memory gives your CPU full access to GPU memory, rather than just pre-mapped memory. The former is inexplicably not available on the Radeon RX 6800, but it boosts power limits and the game clock, to give a slight edge in performance. If you see that number, don't worry, your graphics card isn't about to melt.ĪMD is also offering two ways to boost the performance of its Ryzen 6000-class processors: Rage Mode and Smart Access Memory. AMD has told us that these new GPUs are expected to see the hotspot temp hit up to 110C during normal gaming usage, and that it's within spec and won't cause problems. When you're watching your temperatures, it's important to note that the former is what you should be concerned with. Throughout our testing, temperatures peaked at 75C, with the GPU hotspot temp reaching just 88C. Thanks to the new cooler design, however, temperatures are lower for the most part. And, throughout our testing, ASIC power consumption peaked at 213W, which suggests that there is more room for performance through later driver updates and aftermarket board designs. It's testament to the optimizations AMD made that it was able to double the size of the GPU – from 251mm² and 10.3 billion transistors on the 5700 XT to 519mm² and 26.8 billion transistors on the RX 6800 – and boost clock speeds by so much, while the board power only increased from 225W to 250W. This might be down to the pre-release driver we reviewed the graphics card on, however. During our testing, however, we saw clock speeds over the Boost Clock, and they were sustained there. The AMD Radeon RX 6800 has a Game Clock of 1,815MHz and a Boost Clock of up to 2,105MHz. The Game Clock is about where AMD expects the graphics card to sit most of the time. ![]() The Boost Clock is only the peak frequency – you'll only see this frequency during short bursty workloads. When you look at the spec sheet, you'll see two frequencies laid out – the Game Clock and the Boost Clock. The way AMD specs out frequency on its graphics cards is a tad confusing, but it's actually pretty helpful. AMD has been hard at work boosting efficiency, though, and has managed to boost frequency by a massive amount. Each Compute Unit has 64 Stream Processors, for a grand total of 3,840 on the Radeon RX 6800. And the gap widens significantly with DLSS on.īeyond that, the layout is very similar. In terms of raw ray tracing performance, in Metro Exodus with Ray Tracing on and DLSS off (Deep Learning Super Sampling) – a technology exclusive to Nvidia, which AMD doesn't have a real answer for – the Radeon RX 6800 is significantly slower than RTX 3070. Then, of course, AMD has included Ray Accelerators – one in each of the 60 Compute Units. This results in a theoretical 2.4x bandwidth per watt increase over having straight GDDR6 on a 256-bit bus. This makes the GDDR6 memory on the 256-bit bus even more efficient than GDDR6X, while consuming less power. Essentially, this is is a global cache for the GPU which boosts bandwidth for the video memory (VRAM). The first of these is the Infinity Cache. There are two massive differences from the first generation of RDNA, even though they were both built using the same 7nm (nanometer) manufacturing process. However, it's important to keep in mind that both the PS4 and Xbox One also used AMD graphics, and it didn't drastically effect PC game optimization over the last generation, so this could end up being a moot point – only time will tell on this, though. Practically speaking, this means little to nothing right now, but has the potential to impact PC game optimization over the next generation of the best PC games. The AMD Radeon RX 6800 is based on AMD's RDNA 2 graphics architecture, which is conveniently the same graphics tech behind both the PS5 and the Xbox Series X. ![]()
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