Intel BX80646I74790S Core i7 4790S 3.2 GHz CPU

Product Information

Intel ไม่ได้เป็นเครื่องบ่งชี้ประสิทธิภาพ หมายเลขโปรเซสเซอร์แสดงถึงความแตกต่างของคุณลักษณะในโปรเซสเซอร์แต่ละตระกูล โดยไม่ข้ามตระกูลของโปรเซสเซอร์ โปรดดู http://www.intel.com/content/www/th/th/processors/processor-numbers.html สำหรับรายละเอียด 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

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%. 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 SetupAs 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.

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 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. Processors that support 64-bit computing on Intel® architecture require an Intel 64 architecture-enabled BIOS.

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. 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. 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. TDP ของระบบและ TDP สูงสุดจะกำหนดจากการจำลองสถานการณ์ที่เลวร้ายที่สุด TDP ที่เกิดขึ้นจริงอาจมีค่าต่ำกว่า ถ้าไม่ได้ใช้ I/O ทั้งหมดสำหรับชิปเซ็ต