在Github发现一个很好的DDR4 超频指导+MemTestHelper（自动跑个Memtest进程）
链接：https://github.com/integralfx/MemTestHelper
向导链接：https://github.com/integralfx/MemTestHelper/blob/master/DDR4%20OC%20Guide.md
内容：（建议直接去Github上去看）
Table of ContentsSetupExpectations/Limitations
MotherboardICs
Thaiphoon ReportA Note on Ranks and DensityVoltage ScalingExpected Max FrequencyBinningMaximum Recommended Daily Voltage
Integrated Memory Controller (IMC)
Intel - LGA1151AMD - AM4
Overclocking
Finding the Maximum FrequencyTrying Higher FrequenciesTightening TimingsMiscellaneous Tips
IntelAMD
Useful Information
SetupEnsure your sticks are in the recommended DIMM slots (usually 2 and 4).Make sure your CPU is fully stable before overclocking RAM, as an unstable CPU can lead to memory errors. When pushing high frequency with tight timings, it's possible that your CPU can become unstable.Make sure your UEFI is up to date.Thaiphoon to show what ICs (integrated circuits or RAM chips) your sticks use. This will give you an idea of what frequency and timings to expect.MemTestHelper or your memory tester of choice. Karhu RAM Test (paid) is also a good choice. I wouldn't recommend AIDA64 memory test and Memtest64 as they are both not very good at finding memory errors.To view timings in Windows:
Intel: Asrock Timing Configurator v4.0.4 (don't need an Asrock motherboard, though EVGA motherboards don't seem to work with this).AMD:
Ryzen 1000/2000: Ryzen Timing Checker.Ryzen 3000: Ryzen Master.
Benchmarks:
AIDA64 - free 30 day trial. We'll be using the cache and memory benchmark (found under tools) to see how our memory is performing. You can right click the start benchmark button and run memory tests only to skip the cache tests.MaxxMEM2 - free alternative to AIDA64, but bandwidth tests seem to be a lot lower so it isn't directly comparable to AIDA64.Super Pi Mod v1.5 XS - another memory sensitive benchmark, but I haven't used it as much as AIDA64. 1M - 8M digits should be enough for a quick benchmark. You only need to look at the last (total) time, where lower is better.HWBOT x265 Benchmark - I've heard that this benchmark is also sensitive to memory, but I haven't really tested it myself.
Expectations/LimitationsMotherboardMotherboards with 2 DIMM slots will be able to achieve the highest frequencies.For motherboards with 4 DIMM slots, the number of sticks installed will affect your maximum memory frequency.
On motherboards that use a daisy chain memory trace layout, 2 sticks are preferred. Using 4 sticks may significantly impact your maximum memory frequency.On the other hand, motherboards that use T-topology will overclock the best with 4 sticks. Using 2 sticks won't impact your maximum memory frequency as much as using 4 sticks on a daisy chain motherboard (?).Most vendors don't advertise what memory trace layout they use, but you can make an educated guess based on the QVL. For example, the Z390 Aorus Master probably uses a T-toplogy layout as its highest validated frequency is with 4 DIMMs. If the highest validated frequency were done with 2 DIMMs, it probably uses a daisy chain layout.According to buildzoid, daisy chain VS T-topology only matters above 4000MHz. If you're on Ryzen 3000, this doesn't matter as 3800MHz is the typical max memory frequency when running MCLK:FCLK 1:1.
Lower end motherboard may not overclock as well, possibly due to the lower PCB quality and number of layers (?).
Integrated Circuits (ICs)Thaiphoon ReportSingle rank 8Gb Hynix CJR.Single rank 8Gb Micron Revision E (source: Coleh#4297).
SpecTek is supposedly lower binned Micron ICs.Esoteric note: Many people have started calling this Micron E-die or even just E-die. The former is fine, but the latter can cause confusion as letter-die is typically used for Samsung ICs, i.e. 4Gbit Samsung E-die. Samsung is implied when you say E-die, but as people are calling Micron Rev. E E-die, it'd probably be a good idea to prefix the manufacturer.
Dual rank 8Gb Samsung B-die.
A Note on Ranks and DensitySingle rank sticks can usually clock higher than dual rank sticks, but at the same frequency and timings, dual rank sticks can perform a bit better due to rank interleaving.Density matters when determining how far your ICs can go. For example, 4Gb AFR and 8Gb AFR will not overclock the same despite being AFR.
Voltage ScalingVoltage scaling simply means how the IC responds to voltage.On many ICs, tCL scales with voltage, meaning giving it more voltage can allow you to drop tCL. Conversely, tRCD and tRP typically do not scale with voltage on many ICs, meaning no matter how much voltage you pump into it, it will not budge.
As far as I know, tCL, tRCD, tRP and possibly tRFC can (or can not) see voltage scaling.Similarly, if a timing scales with voltage that means you can increase the voltage to run the same timing at a higher frequency.
You can see that tCL scales linearly with voltage on 8Gb CJR.
Some older Micron ICs (before Rev. E), are known to scale negatively with voltage. That is, they become unstable at the same frequency and timings just by increasing the voltage (usually above 1.35v).Here are a table of common ICs and if the timing scales with voltage:[td]ICtCLtRCDtRP8Gb AFRYNN8Gb CJRYY (?)N8Gb Rev. EYNY8Gb B-dieYYY
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头好晕。。。快来扶一扶哀家
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这个也太棒了吧
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看了一下，这段有点问题
In terms of performance: GDM disabled CR 1T > GDM enabled CR 1T > GDM disabled CR 2T.
应该是GDM disabled CR 1T > GDM disabled CR 2T > GDM enabled CR 1T
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Geardown mode (GDM) 对性能影响这么大吗？
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看不懂英语
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虽然影响没那么大，但也不小，GDM disabled 1T才是正1t，但FCLK 1866以后就开始比较难开正1t了。GDM enabled CR 1T约等于2t-2.5t之间的性能，没有正2t性能好
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初期的MesTestHelper多开脚本效率不如噹4.0，不知现在如何
HCI Memtest 200%，Karhu RAMTest居然要求5000%，难度系数差几个数量级好么！
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初代ZEN关闭GDM基本歇菜
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好帖没人顶。
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文章很好，可惜没翻译。
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我正在翻译，发现drunk大大推荐的那篇intel平台的超频指导有部分内容就是这里面的，的确是好文章
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是吗。。难道我1200死活只能3200原因就在于关了gdm?
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有没有大佬能翻译一下啊。
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关了GDM还能到3200算好的了
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辛苦了
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真的很想学习一下但是看不懂，俺的幻光戟3200C14只能XMP使用也不知道为啥，稍微改一下到3400都看不到BIOS
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正在苦修英语，争取能看懂。
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争取在国庆假期翻译完咯
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辛苦了。。。。。。
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坐等大神翻译
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马克一下。。。
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[内存]内存超频翻译转载
https://www.chiphell.com/thread-2112162-1-1.html
(出处: Chiphell - 分享与交流用户体验)
已经翻译，感谢大佬的分享 电路 电子 维修 我现在把定影部分拆出来了。想换下滚，因为卡纸。但是我发现灯管挡住了。拆不了。不会拆。论坛里的高手拆解过吗？ 评论 认真看，认真瞧。果然有收 电路 电子 维修 求创维42c08RD电路图 评论 电视的图纸很少见 评论 电视的图纸很少见 评论 创维的图纸你要说 版号，不然无能为力 评论 板号5800-p42ALM-0050 168P-P42CLM-01
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