Ryzen review thread

[Gunbuster]

Interestingly Windows Power Profile seems to matter, as seen in AMD Ryzen 7 1800X & 1700X Review: Live Up to The Hype? by Hardware Unboxed

[CAT-THE-FIFTH]

OP updated!!

[scaryjim]

Interestingly Windows Power Profile seems to matter ...

WCCFTech have a great follow up article with some information from AMD about some of the problems (originally shared by anselhelm):

http://wccftech.com/amd-ryzen-launch...-amd-response/

Apparently in balanced power mode the clock/voltage updates only occur once every 30ms, while on the high performance mode it updates every 1ms. The new windows driver should fix that.

Other issues: the Windows scheduler apparently has issues with Ryzen's cache size and distinguishing between true cores and virtual threads, so will often push threads onto the slower virtual threads when true cores are available; also High Precision Event Timers can be detrimental to Ryzen performance (perhaps they can also be disbled by the driver?). So known problems that can be fixed by drivers and scheduler updates.

[CAT-THE-FIFTH]

WCCFTech have a great follow up article with some information from AMD about some of the problems (originally shared by anselhelm):

http://wccftech.com/amd-ryzen-launch...-amd-response/

Apparently in balanced power mode the clock/voltage updates only occur once every 30ms, while on the high performance mode it updates every 1ms. The new windows driver should fix that.

Other issues: the Windows scheduler apparently has issues with Ryzen's cache size and distinguishing between true cores and virtual threads, so will often push threads onto the slower virtual threads when true cores are available; also High Precision Event Timers can be detrimental to Ryzen performance (perhaps they can also be disbled by the driver?). So known problems that can be fixed by drivers and scheduler updates.

I mentioned this in the Hexus R7 1800X review thread already:
http://forums.hexus.net/hexus-review...ml#post3776632

I also mentioned the issue about cache and thread priority here:

http://forums.hexus.net/hexus-review...ml#post3777796

Look at the top two posts.

[CAT-THE-FIFTH]

Another day another potential issue which might have hampered performance at launch:

http://hwbot.org/newsflash/4335_ryze...ect_benchmarks

Just ban Gigabyte boards for using old AGESA and make mainboard tab mandatory for AM4 submissions. Not sure about MSI or ASRock but it's not possible to do this on ASUS.

I seriously think with any AMD launch you need +3 months added to the launch to actually get an accurate picture!!