Sb Spread Spectrum

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Index
It's getting expensive…
ASUS Striker II Extreme Board Layout and Features
ASUS Striker II Extreme Specifications
Test System Configuration and Methodology
Overall System Performance with PCMark Vantage
Synthetic 3D Graphics Results
Game Testing - Crysis
Game Testing - Unreal Tournament 3
Game Testing - Company of Heroes: Opposing Fronts
Intel 45nm Quad-Core Overclocking
Memory Access Latency and Read Performance
Memory Write and Copy Performance
Complete BIOS Tuning Guide - "Extreme Tweaker"
Complete BIOS Tuning Guide - "Extreme Tweaker" (Cont'd)
Complete BIOS Tuning Guide - "Memory Timing Setting"
Complete BIOS Tuning Guide - "Over Voltage"
Complete BIOS Tuning Guide - "Over Voltage" (Cont'd)
Complete BIOS Tuning Guide - "CPU Configuration"
Complete BIOS Tuning Guide - "Spread Spectrum Control"
Final Thoughts and Recommendations
Complete BIOS Tuning Guide - "Spread Spectrum Control"
Spread spectrum controls are really added to motherboards for one purpose only - they are sometimes needed so that a device for sale within the US can include a legitimate Declaration of Conformity stating compliance with Part 15 of the Federal Communications Commission (FCC) Rules. This stipulates that operation of the device (motherboard), (a) may not cause harmful interference, and (b) must accept any interference received, including interference that may cause undesired operation. Sales of electronic devices within the US require the strict observation of all FCC rules and regulations.
As a general requirement, every motherboard must be capable of generating and distributing more than one common clocking signal used to coordinate latching times as needed for the transfer and receipt of data across the many high-speed interfaces found in today's systems. Because it is uncommon for different busses to share similar operating frequencies, and because each must be kept independent of the others, a significant portion of motherboard resources are spent locating, monitoring, and regulating these circuits. Each circuit must include a reference frequency, or known base frequency, from which all other frequencies can be derived. A local oscillator usual provides this functionality.
The problem is these oscillators can sometimes cause electromagnetic interference (EMI) centered about their operating frequencies. In an effort to prevent these types of undesired interferences the FCC, an independent licensing organization for devices capable of transmitting electromagnetic signals, either intended or otherwise, operating under the purview of the US government, enacted "Rule 15," effectively limiting the output power of such devices.
Engineers, looking for a way to meet regulation, began using a method for limiting such interferences called spread spectrum clocking. Spread spectrum clocking causes the signal regulation circuit to slightly vary the frequency about the target frequency, effectively "spreading" the power over a somewhat larger frequency band. The method of operation can be used to control system output power below the FCC standard limits, allowing for a claim of full compliance.
As you can imagine, even the smallest variation in a clocking signal can be enough to create data transfer errors. The fundamentals of overclocking demand the cleanest, purest signal possible, which is why spread spectrum should always be disabled unless you have a good reason to enable it. Ergo, CPU Spread Spectrum, PCIE Spread Spectrum, MCP PCIE Spread Spectrum, SATA Spread Spectrum, and LDT Spread Spectrum should all be set to Disabled.
Complete BIOS Tuning Guide - "CPU Configuration" Final Thoughts and Recommendations
Index
It's getting expensive…
ASUS Striker II Extreme Board Layout and Features
ASUS Striker II Extreme Specifications
Test System Configuration and Methodology
Overall System Performance with PCMark Vantage
Synthetic 3D Graphics Results
Game Testing - Crysis
Game Testing - Unreal Tournament 3
Game Testing - Company of Heroes: Opposing Fronts
Intel 45nm Quad-Core Overclocking
Memory Access Latency and Read Performance
Memory Write and Copy Performance
Complete BIOS Tuning Guide - "Extreme Tweaker"
Complete BIOS Tuning Guide - "Extreme Tweaker" (Cont'd)
Complete BIOS Tuning Guide - "Memory Timing Setting"
Complete BIOS Tuning Guide - "Over Voltage"
Complete BIOS Tuning Guide - "Over Voltage" (Cont'd)
Complete BIOS Tuning Guide - "CPU Configuration"
Complete BIOS Tuning Guide - "Spread Spectrum Control"
Final Thoughts and Recommendations
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https://linustechtips.com/topic/828135-spread-spectrum-on-or-off
29.08.2017 · No practical reason, nothing of actual use in day to day unless you live near a power plant or towers with high voltage cabling which cause EMI. Spread Spectrum helps somewhat there as far as I …
Always off if you're overclocking - http://www.anandtech.com/show/2500/20
Thanks. What about at stock speeds? When would I want it on?
Assuming clock and voltages all at stock 99% of the time it won't make any difference in day to day, you will maybe see very slightly higher clock...
Ok thanks. So there is no reason to have it on?
No practical reason, nothing of actual use in day to day unless you live near a power plant or towers with high voltage cabling which cause EMI. Sp...
Thanks a lot. Dumb question- Why would I care about EMI? Is it bad for my computer or something?
http://www.pcguide.com/care/care/gen/envEMI-c.html "Interference can lead to data loss, picture quality degradation on monitors, and other problems...
Thank you very much. I do not have any of those issues, so I guess I will just leave spectrum off.
https://www.anandtech.com/show/2500/20
11.04.2008 · Spread spectrum clocking causes the signal regulation circuit to slightly vary the frequency about the target frequency, effectively "spreading" the power over a somewhat larger frequency band.
Расширение спектра — способ повышения эффективности передачи информации с помощью модулированных сигналов через канал с …
Псевдослучайная перестройка рабочей частоты
Текст из Википедии, лицензия CC-BY-SA
https://otvet.mail.ru/question/74051376
Spread Spectrum (Функция BIOS, позволяющая изменять режим работы задающего генератора частоты и, таким образом, снизить электромагнитное излучение от системного …
https://www.microsemi.com/document-portal/doc_view/135439-white-paper-spread-spectrum...
Spread spectrum clocking is often used to help meet the regulated EMI requirements. A spread spectrum signal has the disadvantage of having much higher jitter than the un-modulated signal. Spread spectrum clocking is commonly used for microprocessor clocks and USB and PCI-Express reference clocks to reduce EMI. How Spread Spectrum …
https://community.amd.com/t5/processors/disable-spread-spectrum-on-asus-prime-b350m-a...
02.10.2019 · Spread Spectrum can be found as the below path in BIOS. AI Tweaker-->DIGI + VRM-->VRM Spread Spectrum. Tips: Spread Spectrum can be selected Enable or Disable only when another selection, VDDCR CPU Switching Frequency, is set as "Auto mode" I tried but VDDCR CPU switching Frequency …
Is there a spread spectrum option in the BIOS?
Is there a spread spectrum option in the BIOS?
Newest gigabyte master x570 bios has it. Works fine on my 3900x and the stable clock let me bump my mem oc one more step up. Cant imagine there's any impact to spread spectrum between a 3700x vs. 3900x. yeah works on Aorus master, they do have clock generator with .00 adjustment and spread spectrum if you leave bclk at 100.
www.reddit.com/r/Amd/comments/d89sc7…
What's the difference between BClk and spread spectrum?
What's the difference between BClk and spread spectrum?
Asus X470-F owner here. Both things in BIOS. Right now touching the BCLK is an instant recipe for not POSTing, some peripherals like certain M.2 drives are VEEERY picky about the bus clock not being 100MHz. Spread Spectrum supposedly reduces interference with (or from, can't remember) the VRM and should not be used if OCing.
www.reddit.com/r/Amd/comments/d89sc7…
Why is it important to use spread spectrum?
Why is it important to use spread spectrum?
The idea behind spread spectrum is to replace high power in a single narrow frequency band with lower power spread over a wider band. This reduces the EMI associated with the signal, and makes it easier to meet the radiated emissions requirements of organizations like the U.S. Federal Communications Commission (FCC).
www.microsemi.com/document-portal/doc…
Is there a way to disable spread spectrum?
Is there a way to disable spread spectrum?
When you set BCLK manually it will be static, like with Spread Spectrum disabled. If the setting is not there, it's not there. Try changing the BCLK setting from Auto to a manually set 100.0 MHz. The board might then in secret disable spread spectrum, even if it has no option for it.
www.overclock.net/threads/how-do-i-disa…
https://en.m.wikipedia.org/wiki/Spread_spectrum
In telecommunication and radio communication, spread-spectrum techniques are methods by which a signal (e.g., an electrical, electromagnetic, or acoustic signal) generated with a particular bandwidth is deliberately spread in the frequency domain, resulting in a signal with a wider bandwidth. These techniques are used for a variety of reasons, including the establishment of secure communications, increasing resistance to natural interference, noise, and jamming, to prevent detection, to limit power flux density (e.g., in satellite d…
In telecommunication and radio communication, spread-spectrum techniques are methods by which a signal (e.g., an electrical, electromagnetic, or acoustic signal) generated with a particular bandwidth is deliberately spread in the frequency domain, resulting in a signal with a wider bandwidth. These techniques are used for a variety of reasons, including the establishment of secure communications, increasing resistance to natural interference, noise, and jamming, to prevent detection, to limit power flux density (e.g., in satellite downlinks), and to enable multiple-access communications.
https://www.overclock.net/threads/how-do-i-disable-spread-spectrum.1742330
19.02.2020 · On C6/C7 series boards, VRM Spread spectrum is there only. On C8 series you guys have SB Spread Spectrum as AGESA allows function to work. I also think this is there on X570 as AMD started allowing BCLK tweaking via CPU clock generator. Where as on past chipsets it wasn't done that way, as AMD did not allow tweaking of BCLK …
Analyzing Turn on Behavior of a Spread Spectrum Clock with Spectrum View
PSK, QPSK, QAM, 16 QAM, DSB, SSB, SSB-SC, VESTIGIAL SB, SPREAD SPECTRUM.
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Week 21: LED Reef Lighting: Tuning PAR, spread, and spectrum | 52 Weeks of Reefing
https://www.reddit.com/r/Amd/comments/d89sc7/bclk_and_spread_spectrum_options_in_bios
yeah works on Aorus master, they do have clock generator with .00 adjustment and spread spectrum if you leave bclk at 100. If you plan on using bclk, old mechanical hdd crap out/loose partition close to …
Yes, for the ASUS Corsshair VIII Pro we do. From my readings, it sounds like you might want to keep this setting … read more
Asus Strix X570-E here. No spread spectrum option, and BCLK goes up only in increments of 1 (so 100, 101, 102...). I … read more
Often you need to set manual settings to unlock CPU spread spectrum to se it in Bios. How do you unlock it in … read more
Newest gigabyte master x570 bios has it. Works fine on my 3900x and the stable clock let me bump my mem oc one … read more
I noticed that on my Asus prime x570 PRO board the bus speed is raised to 100.0 if you do a manual overclock … read more
Everyone Thanks for the responses, appreciate it, Could you also edit your post so it also reflect which … read more
https://www.reddit.com/r/overclocking/comments/dgxjpg/does_spread_spectrum_make_any...
TLDR: Yes, but very little impact, and it can be negative or positive. Spread Spectrum changes the BCLK to reduce Electromagnetic Interference. Clock speeds are calculated based on BCLK, if your CPU is …
https://www.chiphell.com/thread-2209319-1-1.html
14.04.2020 · 1.提升系统稳定性. 2.增加 BCLK频率和 SB Clock Spread Spectrum 到Advanced模式中。. 推荐更新，FLCK之前死活不能1900，升级BIOS之后，把 Spread Spectrum关闭，现在稳定1900了，关键频率终于显示整 …
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Sb Spread Spectrum