Intel BX80646I74790S Core i7 4790S 3.2 GHz CPU

Product Information

Single-Core สูงสุดที่เทคโนโลยี Intel® Turbo Boost สามารถทำได้ โปรดดู www.intel.com/content/www/th/th/architecture-and-technology/turbo-boost/turbo-boost-technology.html สำหรับข้อมูลเพิ่มเติม 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.

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. In this article, we want to cover the S-series product line in particular because the specifications for S-series processors are actually very similar to that of standard Intel CPUs. To determine the advantage of S-series CPUs we will first look at the official specifications differences between a couple of S-series processors and their standard counterparts then move on to our own testing and benchmarking to determine the actual performance, power draw, and thermal differences. Specification Differences

Graphics Output

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 Intel® Iris® Xe Graphics only: to use the Intel® Iris® Xe brand, the system must be populated with 128-bit (dual channel) memory. Otherwise, use the Intel® UHD brand. 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.

HDD, คอนโทรลเลอร์สำหรับกราฟิก, หน่วยความจำ, BIOS, ไดร์เวอร์, Virtual Machine Monitor-VMN, ซอฟท์แวร์แพลตฟอร์ม และ/หรือระบบปฏิบัติการ) สำหรับความเข้ากันได้ของคุณสมบัติ ฟังก์ชันการทำงาน, ประสิทธิภาพ และประโยชน์อื่นๆ ของคุณสมบัตินี้อาจแตกต่างกันไปตามการกำหนดค่าของระบบ All driver and Windows updates were applied prior to testing. Coretemp was used to record both the CPU temperature and operating frequency along with a "watts up? PRO" power meter with USB logging to record the system power draw. Real world difference between 4790 and 4790S Virtual machine speed-up technologies supported by Core i7-4790K and Core i7-4790S are enumerated here. AMD-VFinally, 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. Intel processor numbers are not a measure of performance. Processor numbers differentiate features within each processor family, not across different processor families. See http://www.intel.com/content/www/us/en/processors/processor-numbers.html for details. 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.

Processors that support 64-bit computing on Intel® architecture require an Intel 64 architecture-enabled BIOS. Specifications and connection of peripherals supported by Core i7-4790K and Core i7-4790S. PCIe version Matt Bach is the head of Puget Labs and has been part of Puget Systems, a boutique builder of gaming and workstation PCs, since the early days. This article was originally published on the Puget blog. S-series processors are supposed to be lower wattage (that is how they are primarily advertised by Intel) so the slightly lower performance is to be expected and in some ways is secondary to the power draw of the S-series CPUs. What we found was that the 4790S did indeed draw less power when five to eight threads were being used, but with fewer than five threads the 4790S actually pulled more power than the standard 4790 by an average of 6%. Since Intel's specifications are not very great at showing the actual difference between the S-series and standard CPUs, we decided to compare a Core i7 4790 and a Core i7 4790S to determine the actual power draw, thermal, and performance differences between the two CPUs. For this testing, we used the following hardware: Testing Hardware

TDP

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 classifications are for general, educational and planning purposes only and consist of Export Control Classification Numbers (ECCN) and Harmonized Tariff Schedule (HTS) numbers. Any use made of Intel classifications are without recourse to Intel and shall not be construed as a representation or warranty regarding the proper ECCN or HTS. Your company as an importer and/or exporter is responsible for determining the correct classification of your transaction. 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 summarize both our research and testing results, there are three major ways in which Intel S-series processors differ from the standard models: As you can see in the above chart, it is clear that as more CPU threads are being used, the 4790S runs at an increasingly lower frequency than the standard 4790. This means that even though the 4790S and 4790 technically have the exact same maximum Turbo Boost frequency, they are very different as more threads are being used. Depending on the number of threads, the 4790S is anywhere from .1 to .2 GHz slower than the 4790. This isn't much - only about 2.5 to 5.3% slower - but it lines up almost exactly with what we say in our real world benchmarks.

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 Intel ไม่ได้เป็นเครื่องบ่งชี้ประสิทธิภาพ หมายเลขโปรเซสเซอร์แสดงถึงความแตกต่างของคุณลักษณะในโปรเซสเซอร์แต่ละตระกูล โดยไม่ข้ามตระกูลของโปรเซสเซอร์ โปรดดู http://www.intel.com/content/www/th/th/processors/processor-numbers.html สำหรับรายละเอียดSee 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. http://www.intel.com/content/www/th/th/architecture-and-technology/hyper-threading/hyper-threading-technology.html?wapkw=hyper+threading สำหรับข้อมูลเพิ่มเติมรวมถึงรายละเอียดว่ามีโปรเซสเซอร์ใดบ้างที่สนับสนุน Intel® HT Technology