Radeon RX480 faster than a GTX 1080Ti?

Alessio Susi
Joined: 7 Mar 15
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Topic 207775

Is it normal that my Sapphire RX480 is faster than a GTX 980 and 1080Ti for the app Gamma-ray pulsar binary search #1 on GPUs v1.18? The RX480 takes about 700-750 seconds for a task, while GTX 980 ~1600 seconds and the GTX 1080Ti ~900 seconds.

Is there a difference between NVIDIA and ATI applications?

https://einsteinathome.org/it-it/host/12441031/   -> GTX 980

https://einsteinathome.org/it-it/host/12321953/   -> GTX 1080Ti

 

https://einsteinathome.org/it-it/host/12525172/tasks/   -> my RX480

MSI X370 Gaming Plus
AMD Ryzen 7 1700, 8 core / 16 thread 3.9 GHz
AMD Radeon Sapphire RX 480 4GB Nitro+
Nvidia GTX 1080 Ti Gaming X Trio
2x8 GB G.Skill Trident Z RGB 3200 MHz

[img]http://boincstats.com/signature/-1/user/3515553/sig.png[/img]

DVDL
DVDL
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There is a difference. I do

There is a difference. I do about 15 minutes (900 sec) on a GTX1060 little OC'd when my screen is in standby.

Did you leave a core free on your CPU to support your GPU? It needs 1 core free for max performance.

solling2
solling2
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When comparing times, please

When comparing times, please keep in mind that you may run two tasks at a time on one card, which saves a bit of time.

Alessio Susi
Joined: 7 Mar 15
Posts: 26
Credit: 98,036,736
RAC: 97,804

Yes, I have the CPU

Yes, I have the CPU percentage set on 75% so the GPU app has one core free. However, I'm so satisfied of my GPU

MSI X370 Gaming Plus
AMD Ryzen 7 1700, 8 core / 16 thread 3.9 GHz
AMD Radeon Sapphire RX 480 4GB Nitro+
Nvidia GTX 1080 Ti Gaming X Trio
2x8 GB G.Skill Trident Z RGB 3200 MHz

juan BFP
juan BFP
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Alessio Susi wrote:Is it

Alessio Susi wrote:
Is it normal that my Sapphire RX480 is faster than a GTX 980 and 1080Ti for the app Gamma-ray pulsar binary search #1 on GPUs v1.18?

I belive you not see the entire picture, for example the 1080Ti you pick to compare, runs 3 WU at a time, so it´s actualy crunch a WU in about 330 secs!  A lot faster than the 700 secs you say your 480 is doing. Since i not know how many WU/time you run to be sure if the 700 is for one or 2 WU, but seems the 1080Ti it´s a lot faster.

In my case crunching 2 WU/time  the 1070 crunches a WU in 1100 secs (550 secs per WU) and the 1080 (not Ti) crunches in 930 secs (for 465 secs/WU).  So the Ti model is a lot faster than both but uses a lot more power to do that.

lHj2ixL.jpg

 

Alessio Susi
Joined: 7 Mar 15
Posts: 26
Credit: 98,036,736
RAC: 97,804

Ok ok. I run only 1 WU at

Ok ok. I run only 1 WU at time, so 700 seconds is the real time it takes to complete a task. However, thanks for the explanation ;P

MSI X370 Gaming Plus
AMD Ryzen 7 1700, 8 core / 16 thread 3.9 GHz
AMD Radeon Sapphire RX 480 4GB Nitro+
Nvidia GTX 1080 Ti Gaming X Trio
2x8 GB G.Skill Trident Z RGB 3200 MHz

AgentB
AgentB
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I find the rx-480 on linux

I find the rx-480 on linux (running three tasks) average time is ~1440s / 3 = ~480s

You should be able to make more from your rx-480 running x2 (0.5) or x3 (0.33)

 

 

Zalster
Zalster
Joined: 26 Nov 13
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Thanks Juan,  I haven't been

Thanks Juan, 

I haven't been in home to look at this thread. Juan is correct that 1080Ti was running 3 at a time. However, it's run into an issue that I am trying to address (either the OpenCl here at Einstein or the Nvidia Driver) It's starting to look like a Einstein issue. That computer is on time out by the server here, but should get some more work tonight. Should know more later this week.

Zalster

Alessio Susi
Joined: 7 Mar 15
Posts: 26
Credit: 98,036,736
RAC: 97,804

You have an Intel 4650K and

You have an Intel 4690K and the RX480 8GB. I have an AMD A10-7800 and RX480 4GB. Maybe your takes less time because of more CPU power.

MSI X370 Gaming Plus
AMD Ryzen 7 1700, 8 core / 16 thread 3.9 GHz
AMD Radeon Sapphire RX 480 4GB Nitro+
Nvidia GTX 1080 Ti Gaming X Trio
2x8 GB G.Skill Trident Z RGB 3200 MHz

Gary Roberts
Gary Roberts
Moderator
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Alessio Susi wrote:Maybe your

Alessio Susi wrote:
Maybe your takes less time because of more CPU power.

In my experience, the effect is quite small.  The elapsed time for a GPU task seems to be relatively independent (within reason) of the CPU that supports it.

You will see a bigger improvement in the average time per task just by running two concurrently.  You may even get a further gain by running three.  With AMD GPUs, you wont have to have a 'free' core for each GPU task.  The only way to find out for sure what works best for you is to do proper experiments with different settings.

 

Cheers,
Gary.

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