Perhaps RS can explain the rational in terms you'll understand. I do believe he criticized the 980 for having 4GB but
now defends the 390x
Another example of how you are not reading what I typed. I never defended R9 390X specifically for having max 4GB of VRAM. In fact, if you read my previous posts, I even reiterated 1 more time for people putting words in my mouth that GM200 6GB is the clear pick over R9 390X 4GB in the $700 space
assuming these prices and similar stock vs. stock and OC vs. OC performance, subject to no killer features that separate the two cards, etc.
I simply made a point that
both R9 390/390X 4GB and 8GB card options make sense for different GPU markets/users depending on their needs and upgrade cycles. Some people in this thread don't seem to get this point, instead making bold statements like no one buys a $450-500 GPU for 1080P-1200P. The reason I criticized 980 is the exact same reason - not having both 4GB and 8GB options, as well as NV raising the price yet another $50 from 680 and a whopping $200 above 970 for a mere 16-17% increase in performance. Yuck. Some PC gamers will dump 980 SLI in 1.5-2 yeras from now and others will keep them for 3-4 years. Why didn't NV provide the 8GB option? I never saw you criticize NV for not providing the 8GB option, or addressing how 980 SLI 4GB will surely be faster than R9 390X 8GB. You seem to put blinders on when it comes to 980 SLI 4GB and all the thousnads of gamers who bought those cards, but are quick to jump on R9 390 4GB scenario without knowing a thing about its price or performance. If according to you in the next 2 years 4GB of VRAM is a huge problem/bottleneck, why weren't you or other posters in this thread advocating 6-8GB today never raise any fuss about this to ANYONE buying 970 SLI or 980 SLI? Why didn't you tell 970/980 users going SLI to wait for GM200 6GB cards? Your story is inconsistent but you blame others of shifting goal posts. ^_^
It'll be interesting to see what you have to say
if a $450-500 R9 390 4GB is 87% of Titan X's performance and how you'll try to spin 4GB of VRAM against it considering you made no such mention regarding 980 or 970 SLI, 980 SLI for the last 7 months. Seems like you are so focused on the cream of the crop flagship cards just like you ignored the awesome GTX670 SLI over your 680 SLI, that it seems no matter what 2nd tier GM200 / R9 390 cards bring to the table, they would be an automatic fail to you anyway.
I don't care to start debating dynamic VRAM usage vs. required VRAM usage as I already provided actual benchmarks on this topic but most people here haven't provided a real 3rd party review where Titan X beats 980 SLI in playability when SLI scales to prove a 4GB VRAM bottleneck exists at playable DSR/VSR/MSAA settings. It's like pullling teeth just to get anyone to even link 1 game, nevermind 5-10 games. It's like even the data that was provided was ignored (i..e., 970 SLI 3.5GB >>>>> Titan X in GTA V at 1440P)
The 4GB vs. 8GB debate makes little difference to me personally as I have a 1080P monitor and have no plans to get a 4K monitor without FreeSync/GSync considering the $1K+ price tag. I am sure there are plenty of gamers who feel the same too and won't consider going 4K until we see better availability of higher quality 4K monitors and more FreeSync/GSync SKU options.
All I know is that 14nm/16nm GPUs with HBM2 will smash R9 390X or GM200 6GB in both price/performance and features and then Volta in 2018 will smash Pascal and the cycle will repeat. By
August 2018, GM200 6GB/R9 390X 8GB will be equivalent to a R9 270X today. Since I know this played out for 20+ years in the GPU industry, why would I spend $1400 of my own money on a pair of cards that expensive and keep them for 4 years no matter the marketing spin about future-proofness or demands of next gen PC games? I'd rather get a pair of $400-500 cards, dump them in 2.5 years and get newer cards, and repeat again, in much the same way I would get 670 SLI over 680 SLI or 970 SLI over 980 SLI. Seems like you just want to buy the best once your upgrade cycle comes and don't care about price/performance. That's fine, just be more transparent about it so people understand the context around which your opinion is based.
That's why we have a free market -- if you think $700 flagships in pairs are worth buying to keep for 3-4+ years, you have that option and it is something that works for you and other PC gamers, Great! No one pulls a gun to your head and tells you to keep your GM200 cards for 2 years and sell them if you don't want to upgrade like that.
However, making statements like a $500 card is an automatic fail if it has 4GB of VRAM without providing any benchmarks that show 980 SLI bombing at 1440P doesn't actually show that you put a lot of thought into your answer other than the fact that you have some opinion on 4GB vs. 8GB. Ignoring that
other PC gamers do not always get CF/SLI setups or upgrade to keep their cards for 3-4 years is not being open-minded either. Believe it or not some PC gamers really do buy $400-500 cards (or in pairs) and dump them every 2-2.5 years.