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post #19931 of 44823 (permalink) Old 06-16-2017, 11:13 AM
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Originally Posted by The Stilt View Post

Based on my experience, definitely.
3520MHz 14-14-14-28-56-177ns (tCL-tRCDR/W-tRP-tRAS-tRC-tRFC) stands no chance against fully tuned 3200MHz 12-12-12-26-54-140ns (tCL-tRCDR/W-tRP-tRAS-tRC-tRFC) settings, everything else being equal.

DFICLK (Data Fabric). The fabric that connects the CCXs, memory controller and other blocks within the die together. It's frequency is tied to the MEMCLK (1:2 rate).

I'm beginning to think AIDA64 is a terrible tool to use as far as memory goes cause i see some weird crap and different numbers from time to time.

This is a comparison between [email protected] and [email protected]

If what you say above is correct, which i believe you do, then this shows different. Time to get that good old sisoft sandra perhaps......


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post #19932 of 44823 (permalink) Old 06-16-2017, 11:19 AM
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Yeap...here the numbers change from run to run.

PC Specs: 3900X - X470 Taichi - TridentZ Neo CJR 64GB 3733Mhz tight timings / 1080ti waterforce xtreme - H115i Pro with 4 fans + Lapped IHS + Liquid Metal.
Per CCX OC Settings: 4.5/4.4/4.375/4.375 at 1.331V (1.306V vdroop) Max AIDA64AVX temp 80c balanced AIO (23 room temp)
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post #19933 of 44823 (permalink) Old 06-16-2017, 11:21 AM
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Originally Posted by mackanz View Post

I'm beginning to think AIDA64 is a terrible tool to use as far as memory goes cause i see some weird crap and different numbers from time to time.

This is a comparison between [email protected] and [email protected]

If what you say above is correct, which i believe you do, then this shows different. Time to get that good old sisoft sandra perhaps......

I suggest you ditch AIDA and try with 3DMark Sky Diver CT or HITMAN (make sure you're not GPU limited).
Also I said fully tuned 3200MHz, implying 3520MHz wasn't tuned as far despite both being very low latency.
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post #19934 of 44823 (permalink) Old 06-16-2017, 11:22 AM
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Don't use the Cache & Memory Benchmark, instead use Benchmark -> Memory Latency to get more consistent (and in some cases realistic) numbers.

Overall I suspect that memory latency of low frequency + low latency dimms isn't bottlenecked by the data fabric. I measure lower latencies for 3600-18 than for 3333-14. And those latencies are suspiciously close to the latencies you get between the two CCX parts of the core.

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post #19935 of 44823 (permalink) Old 06-16-2017, 11:26 AM
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To overclock memory on 1401 BIOS you may try various ProcODT at different DRAM voltages. Possible process:
Leave memory timings on Auto, leave CPU at stock speed. Set SOC to 1.1V
1) set DRAM to 1.35V, DRAMBOOT equal to DRAM, VTTDDR to as close as DRAM/2 or above. Find all three in different submenus.
2) try ProcODT values from 36 to 80 Ohms, take notes which ones allow to boot to BIOS.
3) start with 2400 memory speed and increase step by step, then try next ProcODT
Then try 1.375, 1.4 and 1.425V DRAM voltages.
If nothing works set SOC to 1.15V (don't exceed 1.2V). It's a lot of rebooting and taking notes. Once you find which voltages and resistance work for your memory, optimize the timings. Finally change the CPU speed (if needed).

I will try this, thx.
But there must be some strange in 1401.
With 1201 I can reach 2850 MHz, with 1401 is 2400 MHz the End, higher Values will not boot.
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post #19936 of 44823 (permalink) Old 06-16-2017, 11:34 AM
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Originally Posted by The Stilt View Post

I suggest you ditch AIDA and try with 3DMark Sky Diver CT or HITMAN (make sure you're not GPU limited).
Also I said fully tuned 3200MHz, implying 3520MHz wasn't tuned as far despite both being very low latency.

What i use is ibt very high. Can see gains there ez mode. And You cobfirmed what i found month ago or so. Pass like 3300 ddr timings give more juice than mhz my 3671cl16 is slower than 3466cl14.
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post #19937 of 44823 (permalink) Old 06-16-2017, 11:43 AM
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i had code 8 crash twice today while playing battlefield 1 but i tested it with prime 95 and realbench for 15min it did not crash ? using latest bios 1401

Did you sort this? Also just got a code 8 while in Windows, despite being stable on 9945. I know overclocks can vary bios revision to bios revision, but did you get to the bottom of what caused yours?
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post #19938 of 44823 (permalink) Old 06-16-2017, 11:59 AM
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Originally Posted by The Stilt View Post

I suggest you ditch AIDA and try with 3DMark Sky Diver CT or HITMAN (make sure you're not GPU limited).
Also I said fully tuned 3200MHz, implying 3520MHz wasn't tuned as far despite both being very low latency.

Happen to have any really tight cl14 3200 or 3333 timings available?

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post #19939 of 44823 (permalink) Old 06-16-2017, 12:00 PM
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post #19940 of 44823 (permalink) Old 06-16-2017, 12:05 PM
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Originally Posted by mackanz View Post

Happen to have any really tight cl14 3200 or 3333 timings available?

Use these, if you can:




For 3200MHz set tRFC to 307 instead of 333 and 320 for 3333MHz.
You might or might not be able to tighten up tRC bit further, but otherwise it's as good as it gets.
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