Posts by Stef

1) Message boards : Cruncher's Corner : Problem with a R9 390X when run 2 or more WUs at a time. (Message 142923)
Posted 1 day ago by Profile Stef
I didn't find any newer high-end AMD GPUs in the top 100 hosts list, so it definitely is a problem.
2) Message boards : Cruncher's Corner : AMD Fury GPU (Message 142827)
Posted 6 days ago by Profile Stef
Yes, would be nice if a developer could have an eye on that.
I'm planning to buy a new card but with this problems on recent high-end/enthusiast AMD cards, it's difficult to decide. Especially with the upcoming R9 Nano.
3) Message boards : Cruncher's Corner : Best single GPU rig and AMD vs. NVIDIA (Message 142784)
Posted 8 days ago by Profile Stef
My board only has 1 PCI-E slot.

But I'm a bit uncertain now regarding the AMD R9 cards, since in some cases they only seem to run one WU at a time, without producing invalid results.
4) Message boards : Cruncher's Corner : Best single GPU rig and AMD vs. NVIDIA (Message 142756)
Posted 11 days ago by Profile Stef
I think my PSU has a good efficiency (Bequiet E9 400W). I'll wait until the announcement of the R9 Nano GPU next week.
But relating to the R9 Fury thread (http://einstein.phys.uwm.edu/forum_thread.php?id=11352) it may cause some trouble. I haven't seen any of the HBM GPUs in the top 100 list.
5) Message boards : Cruncher's Corner : Best single GPU rig and AMD vs. NVIDIA (Message 142745)
Posted 11 days ago by Profile Stef
I don't mind energy consumption, since i only run it during winter and it is assisting the heating, so I need the exact amount of energy less for heating.

I was looking in the top hosts statistics, because the RAC is including the possibility of multiple instances of e@h running, so I don't have to look into the details.


Let's say I'm willing to spend 200€, I have the choice between a GTX 960 and R9 380.

So If I stick to e@h, AMD is the way to go?
6) Message boards : Cruncher's Corner : Best single GPU rig and AMD vs. NVIDIA (Message 142734)
Posted 12 days ago by Profile Stef
I was trying to find the fastest single GPU rigs, but i didn't found a more efficient way than scrolling through the top hosts list and look for the single GPU ones.
Is there a more efficient way to do this?

And the second question regarding the latest CUDA enhancements:
With which card(s) do I get the most credit per $?
7) Message boards : Cruncher's Corner : AMD Fury GPU (Message 142215)
Posted 39 days ago by Profile Stef
I think those high-end GPUs need a lot of units in parallel to benefit from their massive amount of ALUs, regardless what the GPU usage says.

Would be nice if you could compare them with 4x to 8x.
8) Message boards : Cruncher's Corner : GPU computing benchmark site tip? (Message 141664)
Posted 67 days ago by Profile Stef
Computerbase (german) did some computing Benchmarks; Musemage, CompubenchCL, Computemark, Folding@home, GPUPI and luxmark:

http://www.computerbase.de/2015-06/amd-radeon-r9-fury-x-test/8/
9) Message boards : Cruncher's Corner : GPU computing benchmark site tip? (Message 141648)
Posted 68 days ago by Profile Stef
It depends very much on the application. Application A can run faster on one card and application B on the other.
The new R9 Fury X should be very fast with double precision calculations, at least compared to the NVidia.

I'm very curious how it performs on einstein (it doesn't use double precision though).
10) Message boards : Problems and Bug Reports : BRP4 Intel GPU app feedback thread (Message 141443)
Posted 83 days ago by Profile Stef
I did a "echo 0 > /sys/module/i915/parameters/enable_cmd_parser" and patched the Kernel (4.0.4) with https://01.org/zh/beignet/downloads/linux-kernel-patch-hsw-support
But I only ran one WU, which turned out invalid.


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This material is based upon work supported by the National Science Foundation (NSF) under Grants PHY-1104902, PHY-1104617 and PHY-1105572 and by the Max Planck Gesellschaft (MPG). Any opinions, findings, and conclusions or recommendations expressed in this material are those of the investigators and do not necessarily reflect the views of the NSF or the MPG.

Copyright © 2015 Bruce Allen