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#1 AMD Radeon VII
Posted: Mon Feb 11, 2019 11:41 pm
by scole of TSBT
The new 7 nm GPU became available here in the US last week. The Radeon VII (Vega 20) had specs too good to pass up. 11136/13824 (base/boost) SP GFLOPS and 2784/3458 DP GLFOPS, 300W TBP. So I bought a couple with plans to sell one. Anyone interest in the other? PM me if interested. I'll ship to the UK as long as you pay the shipping, VAT, etc.
#2 Re: AMD Radeon VII
Posted: Tue Feb 12, 2019 5:44 am
by davidbam
Yikes 300W !
Love to hear how you get on with it. Will you be crunching Milky Way with all that DP power?
How much does one cost State-side?
#3 Re: AMD Radeon VII
Posted: Tue Feb 12, 2019 1:39 pm
by scole of TSBT
davidBAM wrote: ↑Tue Feb 12, 2019 5:44 am
Yikes 300W !
Love to hear how you get on with it. Will you be crunching Milky Way with all that DP power?
How much does one cost State-side?
The crunching power of 3x R9 280X/HD7970 but using 1/3 the juice and creating 1/3 the heat.
Here'a system that ran a set of Milkyway WUs. ~20 sec per WU...
https://milkyway.cs.rpi.edu/milkyway/re ... tid=797216
$699+tax but most retailers are out of stock already. I found a couple at a Micro Center in Duluth, Georgia and my brother picked them up and is mailing them to me.
#4 Re: AMD Radeon VII
Posted: Tue Feb 12, 2019 1:54 pm
by davidbam
Wowser - first one I checked was validated on an nVidia 1070ti taking 7 times longer
https://milkyway.cs.rpi.edu/milkyway/wo ... 1716893243
#5 Re: AMD Radeon VII
Posted: Thu Feb 14, 2019 9:32 pm
by scole of TSBT
Milkyway testing in 4c/8t i7-3770 system
| Avg Sec | Theoretical | Theoretical |
|---|
| # WUs | per WU | WU per Hour | Hourly Cr |
|---|
| 8 | 92 | 313.04 | 71,061 |
| 6 | 68 | 317.65 | 72,106 |
| 4 | 46 | 313.04 | 71,061 |
| 3 | 35 | 308.57 | 70,046 |
| 2 | 28 | 257.14 | 58,371 |
| 1 | 22 | 163.64 | 37,145 |
In reality, it did 309 WUs and logged 65k cr in an hour. It might do a little more once pendings start going valid.
#6 Re: AMD Radeon VII
Posted: Thu Feb 14, 2019 9:40 pm
by davidbam
Looking good
have you tried it on Collatz yet?
#7 Re: AMD Radeon VII
Posted: Thu Feb 14, 2019 10:26 pm
by scole of TSBT
Collatz testing in 4c/8t i7-3770 system
| Run Time | CPU Time | Credit |
|---|
| 301.72 | 4.97 | 30,903.39 |
| 311.19 | 4.73 | 32,869.79 |
| 311.57 | 4.59 | 31,015.35 |
| 277.69 | 11.88 | 30,968.73 |
| 333.21 | 18.30 | 32,658.67 |
Using this config and app_config.xml...
verbose=1
kernels_per_reduction=48
threads=8
lut_size=17
sleep=1
reduce_cpu=0
sieve_size=28
<app_config>
<project_max_concurrent>1</project_max_concurrent>
<app>
<name>collatz_sieve</name>
<gpu_versions>
<gpu_usage>1</gpu_usage>
<cpu_usage>1</cpu_usage>
</gpu_versions>
</app>
</app_config>
If there's a tighter config I'll try it.
#8 Re: AMD Radeon VII
Posted: Fri Feb 15, 2019 1:59 pm
by scole of TSBT
Increased sieve_size from 28 to 30. The avg credit/run-sec went from 96.88 to 114.76 which is an 18% improvement.
Collatz testing in 4c/8t i7-3770 system
| Run Time | CPU Time | Credit |
|---|
| 245.70 | 3.03 | 28,188.33 |
| 246.63 | 3.22 | 27,677.64 |
| 244.74 | 5.19 | 28,116.11 |
| 245.70 | 4.81 | 28,804.47 |
Using this config and app_config.xml...
verbose=1
kernels_per_reduction=48
threads=8
lut_size=17
sleep=1
reduce_cpu=0
sieve_size=30
<app_config>
<project_max_concurrent>1</project_max_concurrent>
<app>
<name>collatz_sieve</name>
<gpu_versions>
<gpu_usage>1</gpu_usage>
<cpu_usage>1</cpu_usage>
</gpu_versions>
</app>
</app_config>
#9 Re: AMD Radeon VII
Posted: Fri Feb 15, 2019 2:08 pm
by davidbam
Many thanks for the info. As you said yourself, I think, the really significant improvement is on projects which use double precision math
#10 Re: AMD Radeon VII
Posted: Fri Feb 15, 2019 9:08 pm
by scole of TSBT
Einstein testing in 4c/8t i7-3770 system
| Avg Sec | Theoretical | Theoretical |
|---|
| # WUs | per WU | WU per Hour | Hourly Cr |
|---|
| 1 | 272 | 13.24 | 45,860 |
| 2 | 421 | 17.10 | 59,259 |
| 3 | 521 | 20.73 | 71,827 |
I get too many computation errors running 3 WUs at a time. I don't think it was running at 100% though. Maybe somebody has an idea to resolve it.
Amicable Numbers testing in 4c/8t i7-3770 system
Forget it. Something has changed. 4 WUs on a GTX 1080 only having it peaking at 30% utilization. Not enough GPU memory to run more. Difficult to tell what the Radeon VII is doing. MSI Afterburner nor GPU-Z see anything and AMD's new software stinks.