AMD launched the Ryzen 5000 APUs (Cezanne AM4) for the DIY market last week to an overwhelming reception, selling several thousand units within hours across the world. Most reviewers, including us, focused on the iGPU capabilities of the SKU, and to an extent, the CPU and cache performance. The power efficiency of these parts was somewhat overlooked in the process. Now, thanks to Twitter user (@VPCF) we have a comparison of the average power draw of the Ryzen 7 5700G, its older Renoir predecessor (4750G), and the Intel Rocket Lake competitor (core i7-11700):
As you can see, the Ryzen 7 5700G pretty much annihilates the Core i7-11700 in terms of efficiency. It scores over 5,000 points in Cinebench MT while consuming just 70W of power. The Core i7-11700 manages the same score with twice the power draw (140W). At lower scores (lower PPT caps), the delta between the two isn’t that significant, but after the 3,500 point mark, there’s a sharp increase in Rocket Lake’s power consumption. This shows that much of Intel’s frequency gains with Skylake-based chips come at the cost of power. This isn’t surprising as the latter is based on the 6-year old 14nm Intel process node, but the two chips are direct competitors after all. Additionally, it’s worth noting that the 5700G is capable of beating the 11700 despite running at a slightly lower clock (4.0GHz vs 4.2GHz). This indicates that Zen 3 has a higher IPC than Cypress Cove, even though the latter was launched several months after the former.
In comparison to the Zen 2-based 4750G, we’re looking at an efficiency gain of 20-40% at higher frequencies. This is primarily due to the massive increase in IPC with Zen 3, and AMD’s familiarity with TSMC’s N7 node at this point.
It’ll be interesting to see just how much of an efficiency boost does Alder Lake provide with its 10nm ESF node and a hybrid core architecture against Vermeer, and the upcoming Zen 4 Raphael chip. If the latter manages to beat Intel’s new champion with regard to efficiency, it’ll really be a pathetic showing from Intel.