Ashes of the Singularity Revisited: A Beta Look at DirectX 12 & Asynchronous Shading
by Daniel Williams & Ryan Smith on February 24, 2016 1:00 PM ESTDirectX 12 vs. DirectX 11
Now that we’ve had the chance to look at DirecX 12 performance, let’s take a look at things with DirectX 11 thrown into the mix. As a reminder, while the two rendering paths are graphically identical, the DirectX 12 path introduces the latter’s multi-core scalability along with asynchronous shading functionality. The game and the underlying Nitrous engine is designed to take advantage of both, but particularly the multi-core functionality as the game pushes some very high batch counts.
Given that we had never benchmarked Ashes under DirectX 11 before, what we had been expecting was a significant performance regression when switching to it. Instead what we found was far more surprising.
On the RTG side of matters, there is a large performance gap between DX11 and DX12 at all resolutions, increasing with the overall performance of the video card being tested. Even on the R9 290X and the 7970, using DX12 is a no brainer, as it improves performance by 20% or more.
The big surprise however is with the NVIDIA cards. For the more powerful GTX 980 Ti and GTX 780 Ti, NVIDIA doesn’t gain anything from the DX12 rendering path; in fact they lose a percent or two in performance. This means that they have very good performance under DX11 (particular the GTX 980 Ti), but it’s not doing them any favors under DX12, where as we’ve seen RTG has a rather consistent performance lead. In the past NVIDIA has gone through some pretty extreme lengths to optimize the CPU usage of their DX11 driver, so this may be the payoff from general optimizations, or even a round of Ashes-specific optimizations.
Breaking down the gains on a percentage basis at 1080p, the most CPU-demanding resolution, we find that the Fury X picks up a full 50% from DX12, followed by 29% and 23% for the R9 290X and 7970 respectively. Meanwhile at the opposite end of the spectrum are the GTX 980 Ti and GTX 780 Ti, who lose 1% and 3% respectively.
Finally, right in the middle of all of this is the GTX 680. Given what happens to the architecturally similar GTX 780 Ti, this may be a case of GPU memory limitations (this is the only 2GB NVIDIA card in this set), as there’s otherwise no reason to expect the weakest NVIDIA GPU to benefit the most from DX12.
Overall then this neatly illustrates why RTG in particular has been so gung-ho about DX12, as Ashes’ DX12 path has netted them a very significant increase in performance. To some degree however what this means is a glass half full/half empty full situation; RTG gains so much from DX12 in large part because of their poorer DX11 performance (especially on the faster cards), but on the other hand a “simple” API change has unlocked a great deal of GPU power that wasn’t otherwise being used and vaulted them well into the lead. As for NVIDIA, is it that their cards don’t benefit from DX12, or is it that their DX11 driver stack is that good to begin with? At the end of the day Ashes is just a single game – and a beta game at that – but it will be interesting to see if this is a one-off situation or if it becomes recurring.
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Kouin325 - Friday, February 26, 2016 - link
yes indeed they will be patching DX12 into the game, AFTER all the PR damage from the low benchmark scores is done. Nvidia waved some cash at the publisher/dev to make it a gameworks title, make it DX11, and to lock AMD out of making a day 1 patch.This was done to keep the general gaming public from learning that the Nvidia performance crown will all but disappear or worse under DX12. So they can keep selling their cards like hotcakes for another month or two.
Also, Xbox hasn't been moved over to DX12 proper YET, but the DX11.x that the Xbox one has always used is by far closer to DX12 than DX11 for the PC. I think we'll know for sure what the game was developed for after the patch comes out. If the game gets a big performance increase after the DX12 patch then it was developed for DX12, and NV possibly had a hand in the DX11 for PC release. If the increase is small then it was developed for DX11,
Reason being that getting the true performance of DX12 takes a major refactor of how assets are handled and pretty major changes to the rendering pipeline. Things that CANNOT be done in a month or two or how long this patch is taking to come out after release.
Saying "we support DirectX12" is fairly ease and only takes changing a few lines of code, but you won't get the performance increases that DX12 can bring.
Madpacket - Friday, February 26, 2016 - link
With the lack of ethics Nvidia has displayed, this wouldn't surprise me in the least. Gameworks is a sham - https://www.youtube.com/watch?v=O7fA_JC_R5skeeepcool - Monday, February 29, 2016 - link
Finally!..I can't even grasp the concept of how low rez and crappy the graphics look on this thing and everybody is praising this "game" and its benchmarks of dubious accuracy.
It looks BAD, its choppy and pixelated, there is a simple terrain and small units that look like sprites from Dune 2000 and this thing makes an high end GPU cry to run at 60Fps's??....
hpglow - Wednesday, February 24, 2016 - link
No insults in his post. Sorry you get your butt hurt whenever someone points out the facts. There are few Direct X 12 pieces of software outside of tech demos and canned benchmarks avalible. Nvidia has better things to do than appease the arm-chair quarterbacks of the comments section. Like optimize for games we are playing right now. Weather Nvidia cards are getting poor or equal performance in DX 12 titles to their DX 11 counterparts is irrelevant right now. We can talk all we want but until there is a DX 12 title worth putting $60 down on and that title actually gains enough FPS to increase the gameplay quality then the conversation is moot.Your first post was trolling and you know it.
at80eighty - Wednesday, February 24, 2016 - link
there is definitely a disproportion in responses - in the exact inverse you described.review your own post for more chuckles.
Flunk - Thursday, February 25, 2016 - link
What? How dare you suggest that the fans of the great Nvidia might share some of the blame! Guards arrest this man for treason!Mondozai - Thursday, February 25, 2016 - link
"No insults in his post."Yeah, except that one part where he called him a fanboy. Yeah, totally no insults.
Seriously, is the Anandtech comment section devolving into Wccftech now? Is it still possible to have intelligent arguments about tech on the internet without idiots crawling all over the place? Thanks.
Mr Perfect - Thursday, February 25, 2016 - link
Arguments are rarely intelligent.MattKa - Thursday, February 25, 2016 - link
If fanboy is an insult you are the biggest pussy in the world.IKeelU - Thursday, February 25, 2016 - link
"Trolling" usually implies deliberate obtuseness in order to annoy. Itchypoot's posts reads like a newb's or fanboy's (likely a bit of both) who simply doesn't understand how evidence and logic factor into civilized debate.