GPU Wars 2016:  Pascal vs Polaris

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KLiK
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Message 1833644 - Posted: 2 Dec 2016, 14:17:22 UTC - in response to Message 1832858.  
Last modified: 2 Dec 2016, 14:17:33 UTC

It is not the 1050 fan making noise,it is the main fan of my HP Pavilion 500-152ea Desktop. For some reason, the GTX 1050 is using more power than the GTX 750 OC it had before.
Tullio

Maybe your card has a smaller fan, so that might be the reason?!

Mine 1050ti has a 90mm fan, so it's quiet enough...
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Message 1833688 - Posted: 2 Dec 2016, 19:05:56 UTC - in response to Message 1833644.  

Temperature of my GPU is always 50 C or lower, and its fan is at 30%. It is not the GPU fan making noise, but the real panel fan.
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Message 1833764 - Posted: 3 Dec 2016, 2:44:43 UTC - in response to Message 1833688.  

True that. Since I installed the 1050ti, I can hear the Corsair PSU and Noctua CPU fan.... also mice crawling in the walls :/
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Message 1833837 - Posted: 3 Dec 2016, 11:29:21 UTC

My old SUN workstation has an open front panel like a car radiator and never overheats. I hear no fans Most modern PCs have a close front panel and only side windows, and they overheat.
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Message 1834025 - Posted: 4 Dec 2016, 14:13:10 UTC
Last modified: 4 Dec 2016, 14:14:10 UTC

I took off the side panel of the PC and things seem to be better. Maybe it was overheating since I installed the GTX 1050 which seems to use more power than the GTX 750 OC it replaced.
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Message 1835829 - Posted: 14 Dec 2016, 2:23:08 UTC

♦  AMD Vega handles Doom like a champ
    "AMD's next-generation Vega GPU is coming soon and according to the newest information, it packs enough punch to run Doom at 4K/UHD resolution at almost 70 FPS. This "result puts it ahead of the Geforce GTX 1080 Ti and close to the Titan X."


♦  AMD Radeon RX 460 can be unlocked
♦  MD shows Vega Cube with 100 TFLOPs

Slightly off-topic
♦  Future Intel CPUs might have AMD graphics

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Message 1835840 - Posted: 14 Dec 2016, 5:02:57 UTC - in response to Message 1835829.  

[quote]♦  AMD Vega handles Doom like a champ
    "AMD's next-generation Vega GPU is coming soon and according to the newest information, it packs enough punch to run Doom at 4K/UHD resolution at almost 70 FPS. This "result puts it ahead of the Geforce GTX 1080 Ti and close to the Titan X."


Given that it's competing against the Tesla P100 and is aimed at the deep learning market, i'd hope so. Since workstation hardware drivers generally aren't optimised for gaming, it's probably capable of better still.


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Message 1835902 - Posted: 14 Dec 2016, 15:24:08 UTC - in response to Message 1835840.  

Hopefully that will be putting some price pressure on the 1080 Ti launch
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Message 1839125 - Posted: 31 Dec 2016, 14:27:59 UTC

As an aside:

NVIDIA GeForce GTX 1080 PCI-Express Scaling

specifically pages 1, 2, 24, 25
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Message 1839502 - Posted: 1 Jan 2017, 23:44:59 UTC - in response to Message 1839125.  

Interesting, thanks for the link. Well, that makes me feel pretty good about my upcoming (eventual) farm additions, because they are all running at PCI-E 1.1 x16, so it looks like I can run pretty much any GPU and not have the bus getting seriously in the way. Now, I will be running the fastest CPU that the boards can take to feed them, but it isn't nearly as bleak as I had been fearing. Good news, thanks again!

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Message 1839518 - Posted: 2 Jan 2017, 1:06:07 UTC - in response to Message 1839502.  
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Interesting, thanks for the link. Well, that makes me feel pretty good about my upcoming (eventual) farm additions, because they are all running at PCI-E 1.1 x16, so it looks like I can run pretty much any GPU and not have the bus getting seriously in the way. Now, I will be running the fastest CPU that the boards can take to feed them, but it isn't nearly as bleak as I had been fearing. Good news, thanks again!

Keep in mind all of those benchmarks are for video games, there aren't any computing benchmarks there.
PCIe v1 *16 certainly won't be an issue, but running high performance cars in PCIe v2 *1 slots maybe.

My GTX 1070s running SoG with aggressive settings have Bus Interface peaks of up to 20% (generally it's around 14-17%) on a PCIe v2.0 *16 Bus running at *8. Whether it's 20% of *16 speed, or 20% of *8 speed, I don't know.
CUDA50 often gave 0%, with the odd 1-2% blip. I suspect Tbars Lunix CUDA special has a much higher bus load; the more work the GPU does, the more it has to communicate with the CPU.

So 20% of PCIe v2 speeds gives.
*1 100MB/s
*4 400MB/s
*8 800MB/s
*16 1.6GB/s

Even hoping for the best (my 20% Bus Load is at the *8 speed ie 800MB/s), PCIe v2 *1 (500MB/s would impact on the throughput of my GTX 1070. Whether that would result in significantly longer crunch times and/or increased CPU usage I've no idea.

The only way to find out is for someone to do the tests. Ideally the most extreme load (a Pascal TitanX), or even just a GTX1080.
Run it with the most aggressive settings possible in a *8 or *16 PCIe v2 or v3 slot & monitor the run times & Bus Load and CPU load.
Then run it in a PCIe v2 *1 slot (or even PCIe v1 *1 if possible) with the same settings & compare run times & Bus usage & CPU load for equivalent runtime WUs.

My personal wild arse guess is that for mid range cards the effect on processing times will be minimal, but for the highest of the high end it will make a significant increase in run times (although the absolute runtimes will still be impressive).
The more powerful the hardware, and the more efficient (ie faster) the application, the greater the effect of any bottlenecks.

PCIe                              Throughput
Version     x1            x4            x8            x16
1.0      250MB/s        1GB/s         2GB/s          4GB/s
2.0      500MB/s        2GB/s         4GB/s          8GB/s
3.0    984.6GB/s    3.938GB/s     7.877GB/s     15.754GB/s
4.0    1.969GB/s    7.877GB/s    15.754GB/s     31.508GB/s

Grant
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Message boards : Number crunching : GPU Wars 2016:  Pascal vs Polaris


 
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