AMD R9 290X?

[Fassan]

Try this:

-setx GPU_MAX_ALLOC_PERCENT 100
-setx GPU_USE_SYNC_OBJECTS 1
cgminer --scrypt -o  -u  -p  -I 20 --thread-concurrency 8191 --worksize 256 -g 2 --lookup-gap 0

840 with a lot of hw error.

I don't know 100% the blue screen is related to the tc. When i play with cgminer (start and stopping) the driver may stop responding and I need to reboot and the occasional bluescreen. But if I reboot and start cgminer and let it run = no problems.

[1713531356]

1713531356

[ivanlabrie]

Try this:

-setx GPU_MAX_ALLOC_PERCENT 100
-setx GPU_USE_SYNC_OBJECTS 1
cgminer --scrypt -o  -u  -p  -I 20 --thread-concurrency 8191 --worksize 256 -g 2 --lookup-gap 0

840 with a lot of hw error.

I don't know 100% the blue screen is related to the tc. When i play with cgminer (start and stopping) the driver may stop responding and I need to reboot and the occasional bluescreen. But if I reboot and start cgminer and let it run = no problems.

Oh my bad, try that with higher TC...was a bit sleepy. :p

[Fassan]

Try this:

-setx GPU_MAX_ALLOC_PERCENT 100
-setx GPU_USE_SYNC_OBJECTS 1
cgminer --scrypt -o  -u  -p  -I 20 --thread-concurrency 8191 --worksize 256 -g 2 --lookup-gap 0

840 with a lot of hw error.

I don't know 100% the blue screen is related to the tc. When i play with cgminer (start and stopping) the driver may stop responding and I need to reboot and the occasional bluescreen. But if I reboot and start cgminer and let it run = no problems.

Oh my bad, try that with higher TC...was a bit sleepy. :p

No good results .

What is the correct way to calculate the tc?

[pontiacg5]

From the scrypt readme

--thread-concurrency:
This tunes the optimal size of work that scrypt can do. It is internally tuned
by cgminer to be the highest reasonable multiple of shaders that it can
allocate on your GPU. Ideally it should be a multiple of your shader count.
vliw5 architecture (R5XXX) would be best at 5x shaders, while VLIW4 (R6xxx and
R7xxx) are best at 4x. Setting thread concurrency overrides anything you put
into --shaders and is ultimately a BETTER way to tune performance.
SUMMARY: Spend lots of time finding the highest value that your device likes
and increases hashrate.

---
TUNING AN AMD RADEON 7970
Example tuning a 7970 for Scrypt mining:

On linux run this command:
export GPU_MAX_ALLOC_PERCENT=100
or on windows this:
setx GPU_MAX_ALLOC_PERCENT 100
in the same console/bash/dos prompt/bat file/whatever you want to call it,
before running cgminer.

First, find the highest thread concurrency that you can start it at. They should
all start at 8192 but some will go up to 3 times that. Don't go too high on the
intensity while testing and don't change gpu threads. If you cannot go above
8192, don't fret as you can still get a high hashrate.
Delete any .bin files so you're starting from scratch and see what bins get
generated.

First try without any thread concurrency or even shaders, as cgminer will try to
find an optimal value
cgminer -I 13

If that starts mining, see what bin was generated, it is likely the largest
meaningful TC you can set.
Starting it on mine I get:
scrypt130302Tahitiglg2tc22392w64l8.bin

See tc22392 that's telling you what thread concurrency it was. It should start
without TC parameters, but you never know. So if it doesn't, start with
--thread-concurrency 8192 and add 2048 to it at a time till you find the highest
value it will start successfully at.

[Fassan]

So according to reamde I should try 2816 x 4 and 5 =  11264 14080 tc. Low results here.
If my math isn't off the overclockers guy uses shaders x 11.63 ish and thats way off according to readme.

The readme don't always apply 100% (sometimes way off) to find the sweet spot. I am wrong here?
Can cards really differ this much or is this a problem with win 8.1 and or AMD drivers??

[Prelude]

My best setting so far is 882KH/s. 920/1500 TC 32765 -g 1. Still havent had time to mess with -g 2, but the only way I can get -g 2 to work without hw errors at 800kh/s or more is with TC at 22550ish or higher. -g 2 needs intensity of 19 or 20 with this card, not 13 like a 7970. These don't configure like previous cards at all.

[Fassan]

My best setting so far is 882KH/s. 920/1500 TC 32765 -g 1. Still havent had time to mess with -g 2, but the only way I can get -g 2 to work without hw errors at 800kh/s or more is with TC at 22550ish or higher. -g 2 needs intensity of 19 or 20 with this card, not 13 like a 7970. These don't configure like previous cards at all.

Running 880 now with those clocks.

[winner999]

It looks like 1000kh/s is possible with higher clocks.

[forevernoob]

It looks like 1000kh/s is possible with higher clocks.

Screenshot?

[Zawamiya]

It looks like 1000kh/s is possible with higher clocks.

What is your settings?

[CryptoCluster]

Someone on Litecoin forum got 843 khs from 290 non-x version.
source: https://forum.litecoin.net/index.php/topic,6842.0.html

[ivanlabrie]

Someone on Litecoin forum got 843 khs from 290 non-x version.
source: https://forum.litecoin.net/index.php/topic,6842.0.html

Thanks! That's the one I want...

[carly200]

I am not registered on that board... but I would like to know the Watt at the wall.

And also, if those settings are stable for 30min,  24h.... (and not just a 2min test)

[leannemckim46]

Someone on Litecoin forum got 843 khs from 290 non-x version.
source: https://forum.litecoin.net/index.php/topic,6842.0.html

Thanks! That's the one I want...

Thanks for sharing, now we just need to wait if the wattage usage is same as R9 280x.... but again I am thinking since ASIC is for scrypt... what should I do ... hm...

[easynote]

Maybe i buy that card soon

[MelodyRowell]

Nice, waiting for more info for R9 290 cards..... wattage

[Gator-hex]

Still waiting for more info about the non x...

Nice, waiting for more info for R9 290 cards..... wattage

It's 2x7870s (2560 SPUs) on a single card that's all you need to know.  

The most power efficient card is the new 7990 (4096 SPUs) with 2x 8pin power. (effectivly 2x7970s with the power of a single 7970!)

[goxed]

Both my SAPPHIRE 290X come with Elpida Memory and are duds wrt scrypt mining. Anything above 550Kh/s comes with lots of HW errors.

[goxed]

If your card is working great can you please post the output of MemtestCL. it's kind of like a memory test for GPU

https://simtk.org/project/xml/downloads.xml?group_id=385

Both my Sapphire R9 290X with Elpida Memory chips throw lots of errors

The errors are in      Random blocks Test
Random blocks: 985 errors (0 ms)

Code:

Test iteration 6 on 128 MiB of memory on device 0 (Hawaii): 0 errors so far
        Moving Inversions (ones and zeros): 0 errors (0 ms)
        Moving Inversions (random): 0 errors (16 ms)
        Memtest86 Walking 8-bit: 0 errors (31 ms)
        True Walking zeros (8-bit): 0 errors (16 ms)
        True Walking ones (8-bit): 0 errors (15 ms)
        Memtest86 Walking zeros (32-bit): 0 errors (78 ms)
        Memtest86 Walking ones (32-bit): 0 errors (63 ms)
        Random blocks: 985 errors (0 ms)
        Memtest86 Modulo-20: 0 errors (171 ms)
        Logic (one iteration): 0 errors (0 ms)
        Logic (4 iterations): 0 errors (0 ms)
        Logic (local memory, one iteration): 0 errors (16 ms)
        Logic (local memory, 4 iterations): 0 errors (0 ms)

[scyth3]

Nice, waiting for more info for R9 290 cards..... wattage

I'm getting 360w at wall for the whole system.