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#121 gamble

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Posted 10 March 2017 - 01:41 AM

Id be really happy with 4ghz for some bench smashing fun!  

 

I found this in Kitguru, dont really know their site much but they had:

 

"There are suggestions that 4.2GHz should be achievable using 1.45V, though neither of the chips that we received were able to hit such levels. AMD also suggests keeping voltage below 1.45V (more towards 1.40V for long-term, 24/7 usage) in order to enhance processor longevity."

 

Seems pretty high to me... as long as the temps are reasonable Id be game


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#122 Jeruselem

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Posted 11 March 2017 - 12:44 PM

Ryzen smt issues can be blamed om windows 10 scheding on the os. Linux kernel 4.10 has the same issue.

Edited by Jeruselem, 11 March 2017 - 12:49 PM.

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#123 Rybags

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Posted 11 March 2017 - 01:07 PM

Shouldn't that be "can't" ?

You can't really hold the software responsible, it was here first by a long shot.  SMT works better with good memory (random) bandwidth which it seems is a lacking area.



#124 Dasa

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Posted 11 March 2017 - 01:41 PM

as is often the case for early adopters of new tech bugs abound

from here

Gigabyte Aorus AX370 Gaming 5 / 7 bug report thread

http://www.xtremesys...g-report-thread

Gigabyte Aorus AX370 Gaming 5 / 7 User Requested Features

1. Change date format from MM/DD/YY to DD/MM/YY
2. Change current UEFI layout, it's clunky and all around poor
3. Put Q-Flash somewhere immediately visible in the UEFI
4. Temperature sensors could do with some re-calibration, appear to be inaccurate by 2.7c (measured with Infrared temperature gun, DT8380)
5. Add options to disable on-board devices, such as audio.

Gigabyte Aorus AX370 Gaming 5 / 7 Confirmed UEFI Bugs & Issues

Gaming 5:

1. Mouse input / responsiveness is laggy in UEFI. Experienced with hardware: Roccat Kova+
2. Resolution appears to be stretched at POST and with the Windows 10 logo while booting when Aorus splash screen is disabled. Experienced with hardware: BenQ GL2450 connected via HDMI, Gigabyte Windforce3 GTX 980
3. LED keyboards are unusable in the UEFI once they enter sleep mode (keyboard backlight goes out) until a reboot. Experienced with hardware: Ares K5, Sunt PK35
4. XMP profile must be loaded before memory multipliers will work. Experienced with hardware: G.Skill Ripjaws V 3200MHz (F4-3200C15D-16GVK)
5. Memory multiplier is limited to a maximum of loaded XMP profile. There must be a way to be able to set higher multipliers.
6. XMP and memory multiplier options are in both Advanced Frequency and Memory Settings menus
7. CPU Clock Ratio is in both MIT and Advanced CPU Core settings menus
8. Apparently redundant naming for some settings in the UEFI. Eg; CPU LLC: Normal, Standard, Medium. Three settings, all essentially with the same meaning.
9. Extremely bad latency, possibly Agesa related and Windows 10 related. See below image for this one. Removing the memory sticks then putting them back in seems to fix latency for the first boot but then latency problem returns on the next boot or reboot.

latency_zpsilujomy1.jpg

Real world impact of this latency problem:
abysmal_zpspy8qghat.jpg
 


Edited by Dasa, 11 March 2017 - 01:42 PM.

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#125 Jeruselem

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Posted 11 March 2017 - 04:11 PM

So the bios/uefi on them ryzen boards are a bit rushed and buggy

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#126 Dasa

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Posted 13 March 2017 - 03:30 PM

while this doesnt bode well for the 6-8 core ryzen game performance due to it being a bit like two quad core cpu joined together there is some latency with cross communication between the first 4 cores and the last 4

it suggests the 4 core 8 thread cpu may not see some of the drops that current ryzen reviews are seeing in some games


Edited by Dasa, 13 March 2017 - 03:33 PM.

Silverstone TJ08-EW 6700k@4.7 1.375v - Z170-GENE - 2x8g 3866 16-16-16 - 1070@ 2100\9600MHz  -Samsung 830 64G, Sandisk Ultra II 960G, WD Green 3tb - Seasonic XP1050 - Dell U2713 - Pioneer Todoroki 5.1 Apogee Drive II - EK VGA-HF Supreme  - Phobia 200mm Rad - Silverstone AP181 Project Darkling
3770k vs 6700k RAM Scaling, HT vs RAM, Arma III CPU vs RAM, Thief CPU vs RAM
Parts Guide


#127 Jeruselem

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Posted 13 March 2017 - 07:11 PM

So it's a hardware issue because of the rather large latency between cores pinging between the ccx, which cannot be fixed by any bios or os change. The chaotic nature of data in a game, means a lot more pinging between cores.

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#128 Dasa

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Posted 13 March 2017 - 09:55 PM

it does seem that way but for programs that only need say 4 threads there is room for software optimization to keep it all together

and although programs that can use 8 cores may not scale as well as they could without that latency results of some games like bf1 suggests that games that can make use of 8 cores 16 threads still do better with them than without

 

i have also seen somebody mention that something i think it may have been the ccx was tied to the memory speed which may be part of the reason increased ram frequency benefit ryzen more than other cpu


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3770k vs 6700k RAM Scaling, HT vs RAM, Arma III CPU vs RAM, Thief CPU vs RAM
Parts Guide


#129 Jeruselem

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Posted 13 March 2017 - 10:02 PM

I dont know why the early ryzen board uefi restrict memory speed to 2400, if this is the csse.

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#130 Dasa

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Posted 13 March 2017 - 10:38 PM

apparently the mb makers only had a few weeks with the bios from amd before launch to tweak it and make adjustments they still need a lot of work

the memory controller on the cpu while efficient with bandwidth seems a little weak at handling more than 2x8g ram so bios optimization will probably only get them so far


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3770k vs 6700k RAM Scaling, HT vs RAM, Arma III CPU vs RAM, Thief CPU vs RAM
Parts Guide


#131 Jeruselem

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Posted 14 March 2017 - 08:57 AM

A few weeks? No wonder the Uefi were so buggy.

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#132 Jeruselem

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Posted 14 March 2017 - 10:42 AM

https://www.techpowe...eporting-offset

 

The Ryzen temp sensors are lying to you! Yes they have an offset ... by design!


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#133 Jeruselem

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Posted 14 March 2017 - 06:57 PM

There's rumours the new MacBooks will be ryzen and not kabylake

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#134 sora3

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Posted 15 March 2017 - 10:55 AM

Well, I can be a guinea pig if needed....

 

32632586523_d42a063faa_b.jpg


Main Rig: AMD Ryzen 7 1700/Asus X370 Prime/Corsair DDR4 3000 16GB/Gigabyte R9 290/Samsung 840 256GB SSD/Bitfenix Shinobi/Stock Wraith Cooler (!)/Corsair HX-750

 

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#135 Jeruselem

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Posted 15 March 2017 - 11:51 AM

Enjoy, tell us if you can get the sod to go over 4Ghz


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#136 sora3

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Posted 15 March 2017 - 09:32 PM

So far, from building point of view, it has been rather simple and not a lot of issues. I've heard reports that the X370 Prime had problems but not on my machine thus far. RAM is stuck at 2133MHz despite the 3000MHz stick itself so I'll have to manually change the timings. Windows reinstall was rather smooth and hopefully looking good.

 

But the biggest problem is that I cannot access the BIOS with my G510s and had to use an older Logitech keyboard to get into the BIOS. So that's going to be a pain if I want to overclock. Well, time to find what's the timings for 2400MHz and go from there. And it is running at 3.33GHz at stock voltage ATM. I'll try and get it clock higher later on.


Edited by sora3, 15 March 2017 - 09:33 PM.

Main Rig: AMD Ryzen 7 1700/Asus X370 Prime/Corsair DDR4 3000 16GB/Gigabyte R9 290/Samsung 840 256GB SSD/Bitfenix Shinobi/Stock Wraith Cooler (!)/Corsair HX-750

 

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#137 Dasa

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Posted 16 March 2017 - 06:27 AM

https://www.techpowe...s-lineup-leaked

6803adc80a48.jpg

low clocks on the 1400\1500x is a shame but with some luck they will still hit 4ghz oc

looks like the 6 core cpu keeps the full 16m l3 cache but the 4 core disables the ccx leaving you with just 8m l3 which may also fix some of the latency related performance issues in games with ryzen


Silverstone TJ08-EW 6700k@4.7 1.375v - Z170-GENE - 2x8g 3866 16-16-16 - 1070@ 2100\9600MHz  -Samsung 830 64G, Sandisk Ultra II 960G, WD Green 3tb - Seasonic XP1050 - Dell U2713 - Pioneer Todoroki 5.1 Apogee Drive II - EK VGA-HF Supreme  - Phobia 200mm Rad - Silverstone AP181 Project Darkling
3770k vs 6700k RAM Scaling, HT vs RAM, Arma III CPU vs RAM, Thief CPU vs RAM
Parts Guide


#138 sora3

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Posted 17 March 2017 - 10:07 AM

So some additional notes to go along.

 

RAM is very picky with what chips it uses. It seems that my SkHynix RAM is not able to boot the board at the XMP standards. However, I've borrowed another kit with Samsung B die RAM which IS able to boot at XMP profiles which indicates a problem at memory standards for all manufacturers. With the Hynix, I cannot boot above 2133MHz standard JEDEC timings. With the Samsung, I can boot at the XMP standards at DDR 2998 or 3000 which is the kit specified.

 

Using the stock cooler, I can get the CPU up to about 3.5GHz at 1.25v with no noticeable issues. I'll probably update once I've done my gaming stress testing which is Fallout 4 and console spawning...

 

EDIT: Stock Cooler is holding about 65C at gaming with max speed. Whisper quiet as well too. Intel stock coolers take note from AMD!


Edited by sora3, 17 March 2017 - 10:32 AM.

Main Rig: AMD Ryzen 7 1700/Asus X370 Prime/Corsair DDR4 3000 16GB/Gigabyte R9 290/Samsung 840 256GB SSD/Bitfenix Shinobi/Stock Wraith Cooler (!)/Corsair HX-750

 

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#139 Jeruselem

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Posted 17 March 2017 - 11:06 AM

https://www.techpowe...a3-instructions

 

Looks like we have a real issue here!

 

An AMD Ryzen 7-1800X powered machine was found to be crashing upon execution of a very specific set of FMA3 instructions by Flops version 2, a simple open-source CPU benchmark by Alexander "Mystical" Yee. An important point to note here is that this little known benchmark has been tailored by its developer to be highly specific to the CPU micro-architecture, with separate binaries for each major x64 architecture (eg: Bulldozer, Sandy Bridge, Haswell, Skylake, etc.), and as such the GitHub repository does not have a "Zen" specific binary.

Members of the HWBot forums found that Ryzen powered machines crash on running the Haswell-specific binary, at "Single-Precision - 128-bit FMA3 - Fused Multiply Add." The Haswell-specific binary (along with, we imagine, Skylake), adds support for the FMA3 instruction-set, which Ryzen supports, and which lends some importance to the discovery of this bug. What also makes this important is because a simple application, running at user privileges (i.e. lacking special super-user/admin privileges), has the ability to crash the machine. Such a code could even be executed through virtual machines, and poses a security issue, with implications for AMD's upcoming "Naples" enterprise processor launch.


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#140 sora3

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Posted 17 March 2017 - 11:13 AM

Missing the point as those instructions were encoded for Haswell. Most of the time, you'll be coding specifically for certain CPUs, NOT someone else's...


Main Rig: AMD Ryzen 7 1700/Asus X370 Prime/Corsair DDR4 3000 16GB/Gigabyte R9 290/Samsung 840 256GB SSD/Bitfenix Shinobi/Stock Wraith Cooler (!)/Corsair HX-750

 

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