Monday, October 2nd 2017

AMD Radeon Vega 64 Outperforms NVIDIA GTX 1080 Ti in Forza Motorsport 7, DX 12

In an interesting turn of events, AMD's latest flagship videocard, RX Vega 64, has seen a gaming performance analysis from fellow publication computerbase.de, which brought about some interesting - and somewhat inspiring findings. In their test system, which was comprised of a 4.3 GHz Intel Core i7-6850K (6 cores), paired with 16 GB of DDR4-3000 memory in quad-channel mode, and Crimson Relive 17.9.3 / GeForce 385.69 drivers, the publication found that the Vega 64 was outperforming the GTX 1080 Ti by upwards of 23%, and that percentage increases to 32% when compared to NVIDIA's GTX 1080. The test wasn't based on the in-game benchmark, so as to avoid specifically-optimized scenarios.
8x MSAA was used in all configurations, since "the game isn't all that demanding". Being it demanding or not, the fact is that AMD's solutions are one-upping their NVIDIA counterparts in almost every price-bracket in the 1920 x 1080 and 2560 x 1440 resultions, and not only by average framerates, but by minimum framerates as well. This really does seem to be a scenario where AMD's DX 12 dominance over NVIDIA comes to play - where in CPU-limited scenarios, AMD's implementation of DX 12 allows their graphics cards to improve substantially. So much so, in fact, that even AMD's RX 580 graphics card delivers higher minimum frame-rates than NVIDIA's almighty GTX 1080 Ti. AMD's lead over NVIDIA declines somewhat on 2560 x 1440, and even further at 4K (3840 x 2160). In 4K, however, we still see AMD's RX Vega 56 equaling NVIDIA's GTX 1080. Computerbase.de contacted NVIDIA, who told them they were seeing correct performance for the green team's graphics cards, so this doesn't seem to be just an unoptimized fluke. However, these results are tremendously different from typical gaming workloads on these graphics cards, as you can see from the below TPU graph, taken from our Vega 64 review.
Source: Computerbase.de
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56 Comments on AMD Radeon Vega 64 Outperforms NVIDIA GTX 1080 Ti in Forza Motorsport 7, DX 12

#52
anubis44
sneekypeetMultiple posts are frowned upon. Please learn to edit or use the multi-quote feature.
www.techpowerup.com/forums/threads/how-to-edit-posts-and-use-the-multi-quote-features.234427/
OK, I'll learn to respond to 5 people in one reply.

Personally, I find it less likely that someone will go digging through a reply with multiple quotes and to be read than a reply to each person individually, but the terrifying fear of the 'double-post' seems to have gripped some people pretty hard, so I'll try to remember the 'rules' on this site.
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#53
EarthDog
anubis44OK, I'll learn to respond to 5 people in one reply.

Personally, I find it less likely that someone will go digging through a reply with multiple quotes and to be read than a reply to each person individually, but the terrifying fear of the 'double-post' seems to have gripped some people pretty hard, so I'll try to remember the 'rules' on this site.
Sure beats a wall of [Insert user here] posts. ;)

Thanks for learning. :)
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#54
RejZoR
@anubis44
Well, we know how much care they take when porting games from "console" PC's to actual PC's...
Posted on Reply
#55
Th3pwn3r
anubis44Vega is 'competitive' in all games. It beats the 1080 Ti in two so far, that have been optimized properly.



Not holding any breath! LOL. Just happy with my R9 290 is all.
Definitely not competitive in all games but I guess that's why you posted it with ' '. , It's subjective.
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#56
kenikal
londisteI wonder what the technical reason behind this is, especially considering the rather quick falloff as the resolution increases. Simply geometry/rasterization vs shaders and changes in bottlenecks?

Edit:
Looking at the scaling from 1080p to 1440p and from 1440p to 2160p, I would say 1080Ti (and to a lesser degree, rest of the nVidia lineup up to 2160p) is somehow CPU-limited. nVidia drivers having larger overhead, async scheduling in drivers or something?

In GPU limited circumstances, I would expect the performance difference from going to larger resolution to be 20+% (maybe 15-20% for 1080p>1440p primarily because this usually tends to be CPU-limited anyway). Here is what the 1080p>1440p and 1440p>2160p performance hit looks like based on these graphs:

1080ti - 7.6% and 11.7%
vega64 - 16.0% and 27.2%
gtx1080 - 8.6% and 20.5%
vega56 - 12.0% and 24.1%
gtx1070 - 6.4% and 22.0%
Well maybe this is the most reasonable reason. (That nvidia driver has much larger cpu overhead.) With forza 7 and 1080ti, my cpu usage is pegged at 100% all the time (100% only in 2 threads) and making somewhat stuttery in some scenario, frametime graph spiking. My cpu is i7 skylake overclocked to 4.5ghz.
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