28/09/2022

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AMD Demonstrates Working 5nm RDNA 3 Chiplet GPU

AMD Demonstrates Working 5nm RDNA 3 Chiplet GPU

AMD’s Radeon RX 7000-series is coming, and dealing {hardware} is now in AMD’s labs. At its Ryzen 7000 launch occasion, AMD demonstrated a working RDNA 3 GPU, aka Navi 3x, aka RX 7000, working a pre-release construct of Lies of P (opens in new tab). (Bounce to 30:48 within the above video if the embed would not do this routinely.) That in fact tells us exactly nothing in regards to the GPU efficiency or {hardware} aside from the truth that it exists, since nobody else has the sport and thus cannot benchmark it or say the way it runs on competing GPUs. Nonetheless, RDNA 3 is in the home!

It is shaping as much as be an thrilling fall for these seeking to improve to top-of-the-line graphics playing cards, as we needs to be getting new Nvidia Ada RTX 40-series GPUs alongside AMD’s RDNA 3 choices. Who will come out on high is anyone’s guess proper now, although it is a secure guess that Nvidia’s new graphics playing cards will launch first.

We are saying that as a result of the most recent rumors and efficiency leaks counsel RTX 40-series playing cards are getting near delivery, and individuals who probably work for main add-in card companions seem to have the {hardware} as properly. AMD’s RDNA 3 in the meantime has solely been demonstrated on AMD’s stage in a really restricted vogue — the “yet one more factor” that AMD CEO Lisa Su likes to toss in on the finish of displays.

Historical past tells us that when AMD exhibits off an upcoming GPU as “yet one more factor,” it is sometimes wherever from three to 6 months out. Nonetheless, Su did say that RDNA 3 could be coming “later this yr,” which implies it has lower than 4 months to get the merchandise out the door.

AMD Demonstrates Working 5nm RDNA 3 Chiplet GPU

(Picture credit score: AMD)

AMD’s demo was working at 4K and extremely settings, and it gave the impression to be clean, however once more that does not inform us a lot. Su goes on to say that it expects to ship greater than a 50% enchancment in efficiency per watt in comparison with the present RDNA 2 (Radeon RX 6000-series) GPUs, however that additionally tells us little or no. RDNA 2 should you’ll recall was additionally supposedly 50% higher in efficiency per watt than RDNA GPUs.

Based on our GPU benchmarks hierarchy, the RX 6900 XT consumes 308W of energy whereas delivering 130 fps at 1080p extremely, 106 fps at 1440p extremely, and 63 fps at 4K extremely. A decrease tier RX 6700 XT makes use of 215W and averages 96 fps, 71 fps, and 39 fps, whereas the RX 5700 XT consumes 214W whereas delivering 74 fps, 53 fps, and 29 fps at those self same resolutions. Do the maths and the 6900 XT offers a 22% to 50% enchancment in efficiency per watt, whereas the 6700 XT solely offers a 29% to 34% enchancment.

The satan as all the time is within the particulars, and we’ll have to attend for RDNA 3 {hardware} to launch earlier than we will decide precisely how good it’s in comparison with its predecessor. More than likely, it can find yourself being “as much as greater than 50% higher efficiency per watt,” however just for choose comparisons — like at 4K extremely maybe, or possibly simply when cherry choosing which GPUs you need to examine.

AMD Demonstrates Working 5nm RDNA 3 Chiplet GPU

(Picture credit score: AMD)

As with Nvidia’s RTX 40-series, we anticipate AMD to launch with increased efficiency and better priced variants first. Nonetheless, RDNA 3 may also be utilizing 5nm GPU chiplets. Meaning it is potential the top-performing options from AMD might be composed of a number of chiplets, and it might thus launch a midrange providing concurrently. Alternatively, we’re nonetheless attempting to find out what precisely AMD intends to do with “GPU chiplets.”

With its Ryzen CPUs, AMD has a central IO chiplet that connects to reminiscence, PCIe, and different interfaces. That is fabricated on a earlier era 12nm course of within the case of the Ryzen 5000-series, and that is nice as a result of exterior interfaces usually do not scale properly with smaller nodes. The CPU chiplets are then manufactured on a 7nm, and shortly to be 5nm, course of node, linked to the IO chiplet through AMD’s Infinity Material. May AMD do one thing comparable with GPUs? Maybe, or it might go a wholly completely different route.

One of many rumors floating round is that AMD might be utilizing reminiscence interface chiplets. The concept is to maneuver all of the GDDR6 controllers on to chiplets… which might then hyperlink to the principle GPU through Infinity Material. We’re not totally positive what the profit could be, because you’d nonetheless want Infinity Material on every of the chiplets, however we’ll discover out what precisely AMD plans within the coming months.

Lisa Su says the unnamed RDNA 3 GPU — presumably the top-tier mannequin, however we do not know for sure — was working Lies of P at 4K and extremely settings. She additionally states that, “We’re feeling nice about how RDNA 3 seems to be within the labs, and I am unable to wait to inform you extra about it once we launch later this yr.” We’re excited as properly, although it seems we’ll haven’t any alternative however to attend a bit longer.