The leaked document also mentions a Lockhart profiling mode. Sources familiar with Microsoft’s Xbox plans tell The Verge that this special Lockhart mode is part of the Xbox Series X developer kit. The devkit, codenamed Dante, allows game developers to enable a special Lockhart mode that has a profile of the performance that Microsoft wants to hit with this second console. We understand that includes 7.5GB of usable RAM, a slightly underclocked CPU speed, and around 4 teraflops of GPU performance. The Xbox Series X includes 13.5GB of usable RAM, and targets 12 teraflops of GPU performance.
Microsoft has still not publicly acknowledged its Lockhart plans