The AMD Radeon VII Review: An Unexpected Shot At The High-End
by Nate Oh on February 7, 2019 9:00 AM ESTRadeon VII & Radeon RX Vega 64 Clock-for-Clock Performance
With the variety of changes from the Vega 10 powered RX Vega 64 to the new Radeon VII and its Vega 20 GPU, we wanted to take a look at performance and compute while controlling for clockspeeds. In this way, we can peek at any substantial improvements or differences in pseudo-IPC. There's a couple caveats here; obviously, because the RX Vega 64 has 64 CUs while the Radeon VII has only 60 CUs, the comparison is already not exact. The other thing is that "IPC" is not the exact metric measured here, but more so how much graphics/compute work is done per clock cycle and how that might translate to performance. Isoclock GPU comparisons tend to be less useful when comparing across generations and architectures, as like in Vega designers often design to add pipeline stages to enable higher clockspeeds, but at the cost of reducing work done per cycle and usually also increasing latency.
For our purposes, the incremental nature of 2nd generation Vega allays some of those concerns, though unfortunately, Wattman was unable to downclock memory at this time, so we couldn't get a set of datapoints for when both cards are configured for comparable memory bandwidth. While the Vega GPU boost mechanics means there's not a static pinned clockspeed, both cards were set to 1500MHz, and both fluctuated from 1490 to 1500MHZ depending on workload. All combined, this means that these results should be taken as approximations and lacking granularity, but are useful in spotting significant increases or decreases. This also means that interpreting the results is trickier, but at a high level, if the Radeon VII outperforms the RX Vega 64 at a given non-memory bound workload, then we can assume meaningful 'work per cycle' enhancements relatively decoupled from CU count.
As mentioned above, we were not able to control for the doubled memory bandwidth. But in terms of gaming, the only unexpected result is with GTA V. As an outlier, it's less likely to be an indication of increased gaming 'work per cycle,' and more likely to be related to driver optimization and memory bandwidth increases. GTA V has historically been a title where AMD hardware don't reach the expected level of performance, so regardless there's been room for driver improvement.
SPECviewperf is a slightly different story, though.
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Oxford Guy - Thursday, February 7, 2019 - link
This card is a turkey for gamers. AMD fixed the noise level problem with Fury X and now we're getting less value than we did then. It's too loud."Also new to this card and something AMD will be keen to call out is their triple-fan cooler, replacing the warmly received blower on the Radeon RX Vega 64/56 cards."
Is the sarcasm really necessary? If you're going to mention the cooler thing why not point out just how far AMD has regressed in terms of noise. Remember Fury X, a card that is nice under load?
"Vega 20 has nothing on paper to push for its viability at consumer prices. And yet thanks to a fortunate confluence of factors, here we are."
Oh please:
Fiji: 596 mm2 for $650. Vega 10 495 mm2 for $500. Vega 20 331 mm2 for $700.
Anandtech says it's all so shocking that Vega 20 is available to consumers at all. Eyeroll. No. For $700, AMD could have put that extra die area to more use and given us 8 GB of VRAM. But that would involve doing the impossible and making a GPU that is attractive to gamers, not just peddling low-end Polaris rehashes indefinitely.
Consumers aren't getting the best value here. They're getting leftovers just as they did with Bulldozer/Piledriver — parts that were targeted at the server market first and not consumers. At least with Vega 20, though, there is some competitiveness, although this is mainly because Nvidia is artificially crippling the value of the GPU market with its inflated pricing strategy. That is what monopolies do, of course. Look at how long Intel was able to coast with Sandy-level performance.
"At 3.5 TLFLOPS of theoretical FP64 performance, the Radeon VII is in a league of its own for the price. There simply aren’t any other current-generation cards priced below $2000 that even attempt to address the matter."
That's marvelous for the people who are able to care about FP64, unlike gamers.
This is what happens when there isn't enough competition in a market. Gamers get the choice of two shafts: Turing and Vega.
Oxford Guy - Thursday, February 7, 2019 - link
Oh, yes... and the "console".At least the Switch is a real console. I'm not talking about that. I'm talking about awful low-end PCs being falsely called consoles, which has been the practice since Jaguar became an (unfortunate) thing.
Korguz - Friday, February 8, 2019 - link
like in a previous post of yours.. are you forgetting that the xbox and xbox 360 were also, " low end " pc's that your are claiming ?? the switch is a real console ?? ha.. the nintendo switch, is based off of the Tegra SoC's from nvidia... in a way.. " still " a low end PC......Oxford Guy - Friday, February 8, 2019 - link
The reason the Switch qualifies as a console is that it does something differently vis-à-vis the x86 gaming PC platform. It has a different form factor and related functionality. Artificial software walled gardens do not truly differentiate Sony and MS's low-end PCs from the PC gaming market. They are merely anti-consumer kludge that people have chosen to prop up with their cash.Merely having an x86 processor does not make something equivalent to an x86 PC. The Switch is clearly not the same thing as a low-end PC box like a Jaguar-based rubbish console. I am not particularly enamored with the Switch but at least Nintendo is offering something different to better justify its approach.
Korguz - Friday, February 8, 2019 - link
this sounds more like your own personal opinion and nothing more.. for some reason you hate the current consoles, and seems like there is NO reason for your hate...nintendo has offered something different for a console since the 1st Wii, and honestly, look where it has gotten them... the xbox and playstation platforms outsold the nintendo systems, up to the switch, which has out sold the other 2.. but the games them selves on the nintendo systems.. are lacking..
Oxford Guy - Friday, February 8, 2019 - link
"this sounds more like your own personal opinion and nothing more.. for some reason you hate the current consoles, and seems like there is NO reason for your hate..."Ad hominem isn't a rebuttal.
Korguz - Friday, February 8, 2019 - link
still just sounds like your personal opinion, regardlessHorzaG - Sunday, February 10, 2019 - link
Pointing out that (according to the poster) you're just expressing your opinion and "hate" without reasoning isn't an Ad hominem, you used the term incorrectly earlier in this thread also. Pretty embarrassing to be simultaneously so conceited and so wrong."You should never listen to a word Oxford Guy has to say because he's a frothing fanboy whose posts reek of desperation and are probably indicative of an inability to get laid"
That's an Ad hominem.
Korguz - Tuesday, February 12, 2019 - link
and saying this :" You should never listen to a word Oxford Guy has to say because he's a frothing fanboy whose posts reek of desperation and are probably indicative of an inability to get laid "
about someone.. doesnt prove your point any better...
Oxford Guy - Wednesday, February 13, 2019 - link
"Pretty embarrassing to be simultaneously so conceited and so wrong."It must be.