Also is you see what GAMEs each country plays the most, and what is the top 5 dGPUs you will scratch your head.
Example, USA
http://steamspy.com/country/US
Most played games are
1) CS : Global
2) Garry's Mode
3) TF2
4) DOTA 2
5) Rocket League
According to Hardware Survey of January 2016 , GTX970 is the Top dGPU. Does people buy the GTX970 to play those 5 games ??
You will have to go to number 6 and Fallout 4 to really need a card like GTX 970.
That means that most registered Steam Users dont participate in the Hardware Survey each month.
The most common gpu being used in the steam hardware survey is intel graphics. All five of those games are playable with integrated graphics.
Steam wouldn't be a better indicator. Firstly around 10% to 15% of all PCs don't run Windows.
Then take the Windows PCs,and what percentage of systems with dGPUs will be used for gaming under Windows??
Then look at some games like WoW,which don't use Steam.
Then,add the fact the Steam survey is optional,and people like me had a break of a few YEARS to be asked,when I changed most parts of my system.
Unless you really honestly think more GTX970 cards were sold than GTX750 or GTX750TI derived cards in ALL PCs and all GTX960 derived cards in ALL PCs.
You might want to see what many prebuilt PCs and laptops are using.
Loads of the ones under £1000 even in the UK or Germany are mostly using GM107 and GM206 based chips.
The GTX750 and GTX750TI were out 10 months before the GTX970 alone. Nvidia and AIB partners have consistently said its a very popular card to the extent that they have been even using GM206 chips to meet the demand.
Its even been proven before on this very forum,the Steam metrics are quite wonky in picking up marketshare changes.
Its a useful data point but in the end it is deeply flawed too.
I would rather trust units shipped over an optional survey which only a small percentage of actual gamers will answer.
Valve has not even told us the exact sample number too.
I still expect lots of dGPUs to be sold for non-gaming use on top of this.
Even the units ship method is flawed,so in the end we can only get some rough indications of where changes are happening.
Only Microsoft will have any decent reliable metrics of actual Windows PC dGPU marketshare.
Lots of people are making the mistake of assuming that because the steam survey does not sample certain areas of the market the steam survey is meaningless. Thats only the case if the areas not being sampled have a different composition than the sampled areas.
The area of the market that steam very likely undersamples is the low end (prebuilt) which may contain gpus but are not used for gaming.