12/6/2023 0 Comments Reviews any.do vs. digical![]() That means the two cards should offer relatively similar performance compared to the last-gen RX 6800 XT and 6700 XT, which have 72CUs and 40CUs respectively. RDNA 3 GPUsĪs we noted in our coverage of their official announcement, both of the new AMD graphics cards are based around a singular Navi 32 GPU, with the RX 7800 XT being the fully-enabled 60CU model and the RX 7700 XT using a cut-back 54CU specification. AMD's FSR 3 tech is coming soon and ought to level the playing field against Nvidia's DLSS 3 - here are our 'eyes-on' impressions. It's absolutely baffling, as the RTX 4060 Ti 8GB was a turkey, and in the meantime, price cuts on the 16GB model add further pressure to the 7700 XT. The $449/£429 RX 7700 XT? We're reminded of launch pricing for the RX 7900 XT - it offers proportionately less performance for the money than its more powerful counterpart with 4GB less framebuffer memory too, this time with a more impactful drop from a 16GB to 12GB allocation. ![]() This is AMD making life tricky for its competition. Based on US pricing, it's $100 cheaper, you get undeniably more potent rasterisation performance and the 12 gigs of VRAM offered by the Nvidia card gets a 4GB boost on its new AMD competitor. On the face of it, AMD's new $499/£479 RX 7800 XT certainly offers a strong alternative to the RTX 4070. Put simply, the RTX 4060 Ti is the least compelling offering in the entire desktop 40-series line-up - it's the closest AMD is going to get to an open goal - while the RTX 4070's value proposition was controversial, being the most expensive 70-series card Nvidia has ever made. But as it makes sense to me that "engineering" DR doesn't tell the wole story, other factors as you mention don't either and measurments are precisely an attempt to go beyond a stricly electronic point of view by introducing aspects related to what the sensors are made for.As we move into the mid-range sector of the GPU market, AMD's latest - and last - RDNA 3-based desktop graphics cards represent yet another golden opportunity for AMD to grab some precious market share from Nvidia. I'm not an electronics engineer so there's probably something than I don't understand. By mixing noise concerns and useable shadow levels, he concludes by a 0.74 EV difference, which is significantly less that 1.2. I think that I get your point about noise but he precisely includes circle of confusion to "group" an adequate number of pixels depending on their size, because noise gets less apparent with more pixels to draw information from. Once the sensor clips, it indeed makes more sense to focus on the *useable* rather than absolute low levels, so applies some kind of threshold. ![]() The data from PhotonsToPhotos cannot answer the latter question.Īs far as I understand, photonstophotos measurments take such aspects into account and go beyond "engineering" DR. In low light, the assumption, instead of similar saturation capacity per area, becomes mainly that both formats are shooting at the same exposure, and have similar quantum efficiency. Read noise, which matters to DR, would be largely negligible there. α6700), the FF sensor will be able to hold approximately 2.25× the amount of light, or 1.2 more stops, so that’s roughly how much cleaner a mid-tone (maybe 3–4 stops below saturation) would be in bright light. A full-frame sensor has about 2.25× the surface area of an APS-C sensor, so if the saturation capacity per area is similar (which it tends to be, and is for the α7 IV vs. Being able to hold more light before clipping means that at a given level below saturation, the tones are made of more light, so the contribution of photon shot noise is less.
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