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1) Message boards : Number crunching : Optimizing Collatz v6.xx OpenCL and CUDA Applications (Message 21277)
Posted 863 days ago by Profile bense
I'm also only receiving about 64% utilization for my R9 270X using the same configs that used to give me 100% :(

2) Message boards : Number crunching : Further optimizations when using OSX or Linux as host OS. (Message 20389)
Posted 1010 days ago by Profile bense
I am currently crunching with my liquid cooled μATX system (specs below) on Windows 8.1 Enterprise x64.

ASRock X99M Extreme4
4x4GB of DDR4-2400 (stock 2400 clocks)
i7-5820K @ 4.4 GHz (w/ Koolance CPU-370si water block)
XFX R9 290 @ 1150MHz Core, 1440MHz RAM (w/ Heatkiller water block & flashed with PT1 Custom
Nvidia GTX 770 @ 1320MHz Core, 1753MHz RAM (w/ Heatkiller water block & flashed with Galaxy HOF BIOS)
Swiftech MCP35x2, radiators: 360x120mm, 240x120mm, and two 120x120mm.

I have a 1GB RAM drive where both the boinc application directory and the boinc data directory reside.

I use MSI Afterburner to get my R9 290 clocks where they are (btw, I'm unfortunately unable to unlock the extra R9 290x cores on my R9 290).

My AMD OpenCL collatz.config

My Nvidia Cuda collatz.config

To the best of my knowledge, I have done every possible optimization that I can to ensure that I am achieving the best results.

However, I have begun to develop an additional consideration. Would I receive better results in another operating system? I am considering repartitioning and installing another OS. I can do hackintosh with OSX mavericks/yosemite, or I can do whichever flavor of linux (I'm considering archlinux).

But I am curious to see if any of you have already tried this, and furthermore, how much of an increase (if any) was achieved. Please advise.

Thank you,
3) Message boards : Number crunching : Optimizing Collatz v6.xx OpenCL and CUDA Applications (Message 20355)
Posted 1026 days ago by Profile bense
Tools List for the last stage ....

Valley Benchmark Tool :
Unigine Valley Benchmark Tool:

Clocking the GPU, use MSI Afterburner:
There are trips and traps to using Afterburner, not least the fact that the author is (rightly) paranoid about aspects of Afterburner that *can* be dangerous if abused or used lightly. Post if you don't know the items and where to unlock various bits.

Monitoring whats going on in the PC:
(32 and 64 bit tools, select the one for your machine)

Monitoring whats happening on a GPU:

Step by Step guide to Overclocking a GPU:
LtMatt on that thread (the Thread Owner)is excellent, trust him totally, ask him anything however small. First post is how to overclock a GPU, read through the follow ones to get a feel for issues and solutions to overclocking a GPU. He keeps an eye on the thread - no matter if a few days etc since last post - post there, he'll reply quickly - he's good :)

Above all ....... treat all this with respect, clocking a card is not hard, but its not for the blasé flippant mind-set, treat it seriously, and all is well.

Post detailed questions on these in the Number Crunching Forum

Sorry to necro-post, but I just wanted to thank you for posting this.

I have since overclocked my liquid-cooled Radeon R9 290 from the stock clocks of 947core/1250ram to 1150core/1440ram.

Using this formula (see footnotes of R9 2xx)
[b][i]2*(Shader Count)*(Core Clock in MHz)/(1000) = GFLOPs[/b][/i]

Stock R9 290
Core: 947 MHz
VRAM: 1250 MHz
2*(2560 cores)*(947 MHz)/(1000) = 4848.64 GFLOPs

Bense Overclock
Core: 1150 MHz
VRAM: 1440 MHz
2*(2560 cores)*(1150 MHz)/(1000) = 5888.00 GFLOPs

This is a 21.4% increase in processing power! :D

I looked at this thread at and tried to unlock my R9 290 to a R9 290X (or to be more specific, unlock the extra shaders), but I was unable to do so successfully. I ended up flashing the BIOS from the PT1 Custom

MSI Afterburner 4.1.0 with the following settings:
Core Voltage (mV) = +63
Power Limit (%) = +50
Core Clock (MHz) = 1150
Memory Clock (MHz) = 1440
Aux Voltage (mV) = +25

And here is an image of GPU-Z while under sustained Collatz loading.

I ran many tests with Valley Benchmark and recorded the results in a spreadsheet, Then did more stress and stability testing with MSI Kombustor. These were the settings that I found to be most optimal. However, after gaming for about 25 minutes I have received a black screen. I will have to do some more fine tuning to re-establish gaming stability.


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