Intel BX80646I74790S Core i7 4790S 3.2 GHz CPU

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We have no explanation for why this is, although it could simply be that we had an unusually hot running 4790S and an unusually cool running 4790. Either way, our testing with these sample CPUs indicates that the 4790S is actually only lower power when more than half of the total CPU threads are under load. Conclusion Technological solutions and additional instructions supported by Core i7-4790K and Core i7-4790S. You'll probably need this information if you require some particular technology. Instruction set extensions Performance: On applications that can only utilize a few threads, the S-series CPUs are essentially identical in performance to their standard counterparts. If an application can use a higher number of CPU threads (or if many applications are running at once), however, the S-series CPUs can be as much as 5% slower than the standard models. In other words, TDP is only what the wattage of the CPU is when running at the base frequency, not the maximum frequency as determined by Turbo Boost. And since we have found that the base frequency isn't a great indicator of performance, this means that TDP is also a questionable specification. It certainly indicates that the S-series processors should run at a lower wattage, but unless you disable Turbo Boost it does not in any way guarantee it.

To summarize both our research and testing results, there are three major ways in which Intel S-series processors differ from the standard models: Power Draw: Our testing between a Core i7 4790S and a Core i7 4790 indicates that S-series processors draw less power when more than half the threads on the CPU are being used. On the other hand, our testing also showed that the 4790S actually draw slightly more power when less than half threads are being used. To sum up, all the official specifications really tell us is that S-series processors may be a bit slower and may run a bit cooler than their standard equivalent but it is far from conclusive. For that, we will need to perform our own testing. Test Setup Intel มีไว้เพื่อจุดประสงค์ในเรื่องทั่วไป การศึกษา และการวางแผนเท่านั้น และประกอบด้วยหมายเลข Export Control Classification Numbers (ECCN) และ Harmonized Tariff Schedule (HTS) การใช้งานใดๆ อันประกอบด้วยการจัดประเภทของ Intel จะไม่ได้รับการปกป้องจาก Intel และจะไม่ถูกตีความว่าเป็นการรับรองหรือรับประกันเกี่ยวกับ ECCN หรือ HTS ที่ถูกต้อง บริษัทของคุณต้องรับผิดชอบในการระบุการจัดประเภทที่ถูกต้องของธุรกรรมของคุณ ในฐานะที่เป็นผู้นำเข้าและ/หรือผู้ส่งออก To compare the official specifications between S-series CPUs and their standard counterparts we took four of the latest generation Haswell CPUs. There are, of course, more models available from Intel, but we've found that the differences between S-series and their standard counterparts to actually be very consistent, so this is a good representation of the S-series as a whole. Basic CPU Specifications

HDD, คอนโทรลเลอร์สำหรับกราฟิก, หน่วยความจำ, BIOS, ไดร์เวอร์, Virtual Machine Monitor-VMN, ซอฟท์แวร์แพลตฟอร์ม และ/หรือระบบปฏิบัติการ) สำหรับความเข้ากันได้ของคุณสมบัติ ฟังก์ชันการทำงาน, ประสิทธิภาพ และประโยชน์อื่นๆ ของคุณสมบัตินี้อาจแตกต่างกันไปตามการกำหนดค่าของระบบ Likely, the inconsistencies we found in the previous section are related to how many threads each benchmark is able to utilize and how that affected the amount of Turbo Boost each CPU received. To determine the actual amount of Turbo Boost available to our test CPUs based on the number of active threads we ran Prime95 on each CPU with the bechmark limited to between one and eight active threads. System and Maximum TDP is based on worst case scenarios. Actual TDP may be lower if not all I/Os for chipsets are used. Max Turbo Frequency refers to the maximum single-core processor frequency that can be achieved with Intel® Turbo Boost Technology. See www.intel.com/technology/turboboost/ for more information and applicability of this technology. http://www.intel.com/content/www/th/th/architecture-and-technology/hyper-threading/hyper-threading-technology.html?wapkw=hyper+threading สำหรับข้อมูลเพิ่มเติมรวมถึงรายละเอียดว่ามีโปรเซสเซอร์ใดบ้างที่สนับสนุน Intel® HT Technology

First, the S-series CPUs have a much lower base frequency than the standard CPUs. You would think this means that they will always be slower, but we've shown in the past that the base frequency is somewhat of a meaningless specification due to Intel's Turbo Boost and Speedstep technologies. These technologies mean that an Intel CPU will only rarely operate at the advertised base frequency which brings into question whether this spec actually has any bearing on real-world performance. Finally, the last difference is the lower T case temperature on the S-series CPUs. This is related to Intel's overheating protection and basically is the thermal cutoff point where an Intel CPU will automatically lower its operating frequency to try to reduce the amount of heat the CPU is generating. More information on this is available in our Impact of Temperature on Intel CPU Performance article. Realistically, as long as a CPU has adequate cooling this specification should never have a bearing on the performance of the CPU. See http://www.intel.com/content/www/us/en/architecture-and-technology/hyper-threading/hyper-threading-technology.html?wapkw=hyper+threading for more information including details on which processors support Intel® HT Technology.Intel อาจเปลี่ยนแปลงวงจรชีวิตการผลิต ข้อมูลจำเพาะ และรายคำอธิบายผลิตภัณฑ์ได้ตลอดเวลาโดยไม่ต้องแจ้งให้ทราบล่วงหน้า ข้อมูลในที่นี้มีให้แบบ "ตามที่เป็น" และ Intel ไม่สามารถยืนยันหรือรับประกันแต่อย่างใดเกี่ยวกับความเที่ยงตรงของข้อมูลนี้ รวมไปถึงคุณสมบัติของผลิตภัณฑ์ ความพร้อมวางจำหน่าย ฟังก์ชั่นการทำงาน หรือความเข้ากันได้ของผลิตภัณฑ์ที่ระบุ โปรดติดต่อตัวแทนจำหน่ายระบบสำหรับข้อมูลเพิ่มเติมเกี่ยวกับผลิตภัณฑ์หรือระบบเฉพาะ Virtual machine speed-up technologies supported by Core i7-4790K and Core i7-4790S are enumerated here. AMD-V As we pointed out earlier in this article, due to Intel's Turbo Boost technology an Intel CPU will almost always operate above its rated base frequency when put under load. What is often overlooked, however, is that the Turbo Boost frequency at which a CPU runs depends on the number of cores actively being used. In fact, the maximum Turbo Boost frequency Intel lists on their specification sheets only applies if the CPU is using just a single core. As increasingly more cores are used simultaneously, the maximum Turbo Boost frequency is reduced.