The results across the suite of workloads are used to derive the ACP number. The ACP value for each processor power band is representative of the geometric mean for the entire suite of benchmark applications plus a margin based on AMD historical manufacturing experience.
quote: the APC is not using loads representative of the worst case
quote: These workloads were TransactionProcessing Performance Council (TPC-C), SPECcpu2006,SPECjbb2005, and STREAM. The geometric mean ofmeasurements, taken during these workloads, is the ACP.
quote: if the upper bound -- dictated by worst case forced AMD to change this spec and APC did not change with it, then the apps used to stress the process in assimilating ACP are not representative the entire spread or distribution of available workloads
quote: AMD MEASURES to arrive at TDP, there is nothing theoretical about it
quote: However, Kerby could confirm that if the TDP were to increase again, the company's ACP values would need to be recalculated.
quote: The TDP references in the first document can be replaced with the TDP changes from the second, and in fact should have been.
quote: With Intel doing the same thing for ages this story shouldn't even have been printed and your LIE shouldn't have been told. Talk about irresponsible reporting. As long as we know BOTH TDP and ACP numbers who cares? Intel has been lying about theirs with avg numbers for years (I'm reminded of the stink of Dell Optiplex SFF machines with P4's above 2.4ghz...LOL. Presshots anyone?). Why is it a story when AMD does the same?
quote: ACP – THE NEW STANDARD?The natural question becomes “is this a newindustry standard measurement?” AMD believes themethodology behind ACP should become the newstandard, as it includes both the processor cores andthe memory controller. Today, companies can mask thetrue power consumption by fixating on the processoritself and neglecting to mention the power consumptionof the external memory controller.
quote: if you need to buy several multi-socket servers, then how do you calculate how much power/cooling they need? and how do you compare that to similar machines from intel (and thus calculate possible power savings)?
quote: The 5 applications they chose to determine ACP does not include worst case, which again would make the entire concept of ACP appear wrong
quote: Thermal Design Power: a power dissipation target based on worst-case applications. Thermal solutions should be designed to dissipate the thermal design power.
quote: The processor TDP is based on measurements of processor power consumption while running various high power applications. The data is used to determine those applications which are interesting from a power perspective. These applications are then evaluated in a controlled thermal environment to determine their sensitivity to activation of the thermal control circuit. This data is then used to derive the TDP targets published in the processor data sheat
quote: The thesis is that AMD's ACP is Intel's TDP
quote: Thermal Design Power (TDP) is measured under the conditions of Tcase Max, IDD Max, and VDD=VID_VDD, andinclude all power dissipated on-die from VDD, VDDIO, VLDT, VTT, and VDDA.
quote: Thermal Design Power. The thermal design power is the maximum power a processor can draw for a thermally significant period while running commercially useful software. The constraining conditions for TDP are specified in the notes in the thermal and power tables.
quote: So no, there is still no comparing power usage between AMD and Intel without measuring each system (and that's not even mentioning the Northbridge power or FBDimms).
quote: Priority is going where the chips can go.
quote: I think the market level word is "I can't get any, so who cares until I can".
quote: Not deceit, hiding or faking. By the time we can actually hold ten in our hand on any given day they will have sorted this out.
quote: Oh, wait. That's exactly what TDP is. Maybe someone can remind me again why ACP is supposed to be more relevant, in light of what I just wrote....