Did Biostar's X470GT8 just make one of the best X470 boards VRM wise? - Page 6 - Overclock.net - An Overclocking Community

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Did Biostar's X470GT8 just make one of the best X470 boards VRM wise?

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post #51 of 71 (permalink) Old 03-03-2019, 10:08 AM
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Bummer. I like that the individual case fans profile can be changed so that a faster fan can be slowed down to the same speed as a slower fan. This prevents that asynchronous howl that is like fingernails on a chalkboard. I never had a motherboard that could do that before.

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post #52 of 71 (permalink) Old 03-05-2019, 11:43 AM
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Tested out BCLK... just started but.

120 bus speed booted.

edit: 130 bus speed works...

just to figure out what fun one can have with this.

EDIT2: seems PCIe still runs 16x 3.0, so it seems isolated apart with the bus clocks for CPU & PCIE. Good to know

EDIT3: After trying to high (140) I had trouble get back to 130 bclk, You have to ease your way to it and can't just push high right away. Basically try 5Mhz increments at the beginning to see if it sticks otherwise you just get regular 100 bclk. The motherboard needs to go trough some "try it" functions it seems at some clocks and set something for this to function properly.
Well after some retries I got back to 130 and then tried 131 which still was ok then I tried 133 and it booted and started to load windows at which time I got a image corruption and then a loss of video signal. Seems I've reached the limit. Reboot failed and had more trouble than usual to get a cmos-clear to work. Had to do a complete power off.
So around 130 bclk is possible without going overboard with any voltages. This gives me some more things to try at some later date.

EDIT4: Found out there is a limit to RAM speeds. Go above 3200Mhz whatever the ram-divider or bus-clock you get the same issues as when you try it the conventional way. Outright seems to refuse it for some reason. Maybe why 133 bclk didn't work too well earlier. Was ~3200Mhz there with memory.
Bummer was trying to see if I could clock memory higher this way but same problem came about.

Otherwise I'm not seeing issues running higher BCLK other than some software expect 100Mhz reference and report it wrong.
You have to use manual memory timings as the board will try the to go too low in AUTO (using the lower memory speed timings for the higher speed gained with the bclk)
I don't see any specific "gains" yet seems to perform very similar to same clocks/speeds when matched going it the usual way. Maybe a small boost but nothing dramatic, still unverified with A/B testing of any meaningful sort.

I'm surprised to find SoC voltage doesn't seem to matter with bclk, maybe you need a little extra Vcore but nothing special. 1-2 extra notches at 4050mhz core using 120 bclk.
Attached Thumbnails
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NEW: Biostar x480GT8 ~4.0Ghz CPU, 3200Mhz RAM.... not really better
OLD: Ryzen 7 1700 @ ~4.0Ghz, Gigabyte GA-AB350 Gaming 3, F25 BIOS Agesa 1.0.0.6
4x8Gb Kingston HX434C19FB2K2/16 3466C19 1.2V @ 3733Mhz 16.(17).23.17.34.71.tRFC 568 1T 1.490V (Micron E-die 16nm)
Corsair LPX 2x8Gb 2666C16R @ 3200Mhz 14.(17).17.17.31.49...(260) 1T1.470V (Micron B-die 25nm)

Last edited by Nighthog; 03-06-2019 at 08:14 AM.
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post #53 of 71 (permalink) Old 03-07-2019, 12:38 PM
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You went with that far with bclk and it is stable? I was told not to go too far and stopped at 103. Did that disable the P-states?

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post #54 of 71 (permalink) Old 03-08-2019, 06:46 AM
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Quote: Originally Posted by miklkit View Post
You went with that far with bclk and it is stable? I was told not to go too far and stopped at 103. Did that disable the P-states?
Yeah it's stable with limited testing I've done. P-states work and the processor clocks down in idle, but XFR/Boost clocks aren't used at the moment as I use a fixed multiplier with a offset voltage adjustment. (basically P-state OC but you can't set the other states except the highest one(AUTO mode, gigabyte allowed full P-state OC mode with all states available for tweaks))

They who warn about it are worried about corruption and whatnot. Not all boards handle this the same.
This board seems to separate bclk and PCIE frequencies though don't know how to verify at the moment other than to say the regular software still report gen 3 speeds are used with 130 bclk. (this can't be chosen in BIOS as some other boards can do)

As mentioned earlier my graphics card craps out at 132 bclk. no video and a error message is shown on the debug display on the board which has no explanation in the manual.
*I can verify 131 bclk is the highest it will go and still work/display. (some other graphics card maybe can achieve better results)

There is a trick/requirement to get higher bclk working, you can't use the SATA port 0/1, use the last ones first 4/5 for example. You will get a freeze and debug message on your board not getting trough POST, it gets stuck on "IDE detect" if you use the first ports on your motherboard.


EDIT:
Did a retest with AUTO multiplier to see if PBO/XFR would work together with the increased bclk and it does!
I went as far as 112 bclk for a XFR speed on single core 4.200Ghz but the voltage needed was too much so 110 BCLK with PBO/XFR works on my sample for a single core 4.125Ghz speed. (~1.550V max)
It's a bummer the all core speed is so slow compared to the single core XFR speed, isn't a recommended combo for a Ryzen 7 1700. CPU benchmark scores aren't impressive at all as such, better to do a fixed multi with CnQ/p-state lower clocks working for idle speeds.

Maybe someone with a better binned PCU could get better results with lower voltage and higher speeds. I don't really like going 1.600V for 4.2Ghz XFR...

NEW: Biostar x480GT8 ~4.0Ghz CPU, 3200Mhz RAM.... not really better
OLD: Ryzen 7 1700 @ ~4.0Ghz, Gigabyte GA-AB350 Gaming 3, F25 BIOS Agesa 1.0.0.6
4x8Gb Kingston HX434C19FB2K2/16 3466C19 1.2V @ 3733Mhz 16.(17).23.17.34.71.tRFC 568 1T 1.490V (Micron E-die 16nm)
Corsair LPX 2x8Gb 2666C16R @ 3200Mhz 14.(17).17.17.31.49...(260) 1T1.470V (Micron B-die 25nm)

Last edited by Nighthog; 03-08-2019 at 09:46 AM.
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post #55 of 71 (permalink) Old 03-16-2019, 01:54 AM
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New BIOS available! X47AG304.BST
Testing the new BIOS but I see no difference in general, there are a few more options available that others have noted for AGESA 0.0.7.2 are here as well but the options I wanted for memory are still gone and I see no discernible difference with MEM OC compared to earlier BIOS.
Maybe it resets the BIOS 10% less or something but it is hardly noticeable.

The boot process was a little faster but hardly by much. It's slow nonetheless.

Noticed there is a new Trusted Computing platform inbuilt into the CPU that can now be used for some security stuff vendor "AMD", this wasn't available before.
CPU OC I see no difference thus far, needed the same voltage as before for similar clocks.

Will tinker and see what is different but maybe a 1% or so faster in cpu-z benchmark in AUTO mode and other similar settings I tested before.

Nothing negative in as such yet.

EDIT:
After more testing MEM OC seems to work much easier than before. Can actually combine manual voltage with a manual procODT settings now which improved testing considerably. Seems I need to use some higher procODT values on this board.
53.3Ohm seems to be the sweet spot as of now and I don't seem to need that much voltage as I thought.

NEW: Biostar x480GT8 ~4.0Ghz CPU, 3200Mhz RAM.... not really better
OLD: Ryzen 7 1700 @ ~4.0Ghz, Gigabyte GA-AB350 Gaming 3, F25 BIOS Agesa 1.0.0.6
4x8Gb Kingston HX434C19FB2K2/16 3466C19 1.2V @ 3733Mhz 16.(17).23.17.34.71.tRFC 568 1T 1.490V (Micron E-die 16nm)
Corsair LPX 2x8Gb 2666C16R @ 3200Mhz 14.(17).17.17.31.49...(260) 1T1.470V (Micron B-die 25nm)

Last edited by Nighthog; 03-16-2019 at 03:34 AM.
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post #56 of 71 (permalink) Old 03-16-2019, 09:44 AM
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That is encouraging. There is nothing for my board since 8-7-2018 so a new board will be required. If Biostar keep improving their bios perhaps an X570 board will be viable.

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post #57 of 71 (permalink) Old 03-17-2019, 01:46 AM
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I was always finding poor performance for memory on the board until I found the culprit settings which were at fault thus far. (beyond poor performance)

Settings to look for:
RedirectForReturnDis "1"
L2 TLB Associativity "1"
Enable IBS "disabled"

Chipselect Interleaving "disabled"
BankGroupSwap "enabled"
BankGroupSwapAlt "disabled"

You don't want IBS enabled, neither do you want BankGroupSwapAlt enabled, they cause significant performance drop on you memory.

Other settings not directly tied to memory are(security workarounds I think):
STIBP Status "disabled" (single thread instruction branch predictor?)
NX Mode "disabled" (non execute page function? doesn't do much but maybe affects FPS at times)

NEW: Biostar x480GT8 ~4.0Ghz CPU, 3200Mhz RAM.... not really better
OLD: Ryzen 7 1700 @ ~4.0Ghz, Gigabyte GA-AB350 Gaming 3, F25 BIOS Agesa 1.0.0.6
4x8Gb Kingston HX434C19FB2K2/16 3466C19 1.2V @ 3733Mhz 16.(17).23.17.34.71.tRFC 568 1T 1.490V (Micron E-die 16nm)
Corsair LPX 2x8Gb 2666C16R @ 3200Mhz 14.(17).17.17.31.49...(260) 1T1.470V (Micron B-die 25nm)

Last edited by Nighthog; 03-24-2019 at 02:08 AM.
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post #58 of 71 (permalink) Old 03-17-2019, 09:46 AM
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I vaguely remember some of those settings from 2017, but have not touched them since. Recent win10 updates for intel security issues have caused a slowdown in I/O and possibly ram which are quite noticeable, so perhaps it is time to take a look at them again.

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post #59 of 71 (permalink) Old 03-18-2019, 11:49 AM
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So I took a look and it seems the later bios have been "simplified" on the X370 as well. For instance "bankgroupswapalt" is now gone as well as some other settings.



But setting IBS to "disabled" did help a bit.

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post #60 of 71 (permalink) Old 03-31-2019, 04:38 AM
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How many of you are able to successfully run DDR4-3200 (or faster) with the Biostar X470GT8? I remember it was quite difficult in the past with Biostar boards, and sadly my X370GTN isn't an exception. How about X470GT8 owners?
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