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Official OcUK Ryzen review thread

CAT-THE-FIFTH said:
Only one game it regresses by 1.9% but in EVERY game tested it regressed on the R7 1800X and sometimes upto 13% and Hexus saw the same.
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Eh? That chart shows 5 titles where there is SMT/HT causing degradation on the 6900K:-

F1 2016 -5.5%
GTA V -2.5%
Watch Dogs 2 -6.4%
Civ 6 -2.6%
Myenne jeux 3D -1.9%

So clearly not an issue unique to Ryzen (worse on Ryzen, granted, but not unique). Interesting how Intel have said or done nothing to fix it but AMD have recognised it and vowed to fix it.
 
amigafan2003 said:
Eh? That chart shows 5 titles where there is SMT/HT causing degradation on the 6900K:-

F1 2016 -5.5%
GTA V -2.5%
Watch Dogs 2 -6.4%
Civ 6 -2.6%
Myenne jeux 3D -1.9%

So clearly not an issue unique to Ryzen (worse on Ryzen, granted, but not unique). Interesting how Intel have said or done nothing to fix it but AMD have recognised it and vowed to fix it.
Click to expand...

Have you noticed how Kaby Lake does not show this on average?? Otherwise we would see performance dropping on average for a Core i5 7600K against a Core i7 7700K??

The problem is 12 games show this(I didn't bother posting some other charts),and even looking at the numbers you posted only two games on the Core i7 6900K show more than a 5% margin of error.

AMD is showing drops of over 5% on nearly a dozen games.

Hardware.fr showed that Ryzen was 10% quicker with no SMT enabled. Another site show around 6% to 7% and this is massive.

What you need to understand is that many reviewers didn't disable SMT,they tested with it on which dropped performance anywhere from 5% to 15% which is enough to make Ryzen look more like Ivy Bridge level for gaming.

Its better to switch SMT off for Ryzen,and if more reviews did this things would have looked better.
 
TwsT said:
from where was this chart???
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Hardware.fr - a few others show the same. Hardware.fr hinted it was a scheduling issue due to the design of Ryzen being a pair of 4C core units and Windows not swapping threads properly.

OTH,AMD then said it was not a Windows scheduler issue but more a games optimisation issue which made less sense,and made it sound worse than it is since it would take longer to fix.
 
amigafan2003 said:
Which confirms Ryzen is a server cpu scaled to the desktop.

Naples is going to be interesting when it lands.
Click to expand...

It also explains the lack of SMT optimisations in games and less issues in non-gaming. I suspect AMD was more worried in getting that sorted out first for non-gaming.

My main gripe is that they should have made some excuse and said to test with no SMT in gaming as it would make the performance look stronger.
 
CAT-THE-FIFTH said:
f0NARje.jpg

See what I mean? With SMT on,the R7 1800X looks more like a Core i7 3770K. With it off,it seems more like a Core i7 4790K.

If AMD had communicated this with reviewers beforehand,more reviews would have tested it with SMT off. Haswell level gaming performance is much better sounding than Ivy Bridge level!!
Click to expand...
 
SiDeards73 said:
Because it was blatantly obvious from the noise on many forums that many of the reviews were lazily done and not really real world scenarios... i watched quite a few youtube video reviews last night, and where the chips were setup to counter the issues, they performed very well.

If tech journalists are going to be lazy and not bother giving everyone the full picture, the full story, and conducting the reviews in a proper manner, why should i bother with them? Yeah im biased, im not afraid to admit it either. I am still buying a Ryzen 1700 to replace my 4700k, as i game at 1440p 144hz, its been shown that the 1700 is the perfect chip for this that will only get better. The 7700k is a great here and now chip but lacks any real futureproofing.
Click to expand...

If you had read some of the ones Cat kindly linked you will see some reviewers have done these methods.
Some of what you are blaming tech journalists for isnt their fault EG "Ryzen has Bios fixes and Windows patches to come to fix issues, including Thread priority, SMT Scaling, Memory stability" Thats just AMD being lazy and releasing as a few stated before its ready.
Good luck with your 1700 I'm sure they will be a good cpu for a reasonable amount of time, I'm waiting for the fix's and r5 series to be released before deciding what way i go :)
 
It looks like Hardware.fr has done some more testing with SMT off.

getgraphimg.php



But here is the big kicker!!

getgraphimg.php


They tested in performance mode and found not all the regressions were actually only down to SMT! ;)

Edit!!

PS: Mods, Hardware.fr provide forum links for their review graphs,as they seem fine for direct linking of their images.
 
CAT-THE-FIFTH said:
Hardware.fr showed that Ryzen was 10% quicker with no SMT enabled. Another site show around 6% to 7% and this is massive.
.
Click to expand...

There's a YouTube tech channel ( I can't remember which) that tested at least 12 games, and while some definitely benefited from having SMT off 3 of them actually performed significantly worse with SMT off. It's not a singular picture.
 
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