Case of TOXIC...
No big deal... just a CASE OF TOXIC sitting next to me lol.
LOL ... it's not as many as you think. I grabbed a desktop I'm building for my dad and pulled the guts out and tossed a toxic card in it, with bamt 1.2/cgminer 3.7.2. Going to test it out, find a sweet spot, and then toss it in my bamt1.1/cgminer 3.5 rig to see how it compares.
Test System SpecsASRock N68C-GS FX, HyperX 4gb ram, Athlon X2 270, 600watt PSU
BAMT 1.2, Cgminer 3.7.2
Only 1 GPU
Power Results: Test System Idle: 73w
Test System Full Load Min: 410w
Test System Full Load Max: 455w
Test System GPU Wattage: 337-382w
*Note: about 20w is the cooling fan at 100%
Test System Results so far: TC, Engine, Memory, KH, Temp (stock cooler, 88*F ambient), Watt@wall40960, 1100, 1500, 683kh, 81c, 425w
40960, 1100, 1600, 665kh, 77c, 410w
40960, 1100, 1700, 682kh, 83c, 432w
40960, 1145, 1700, 695kh, 85c, 445w
40960, 1100, 1800, 695kh, 85c, 450w
40960, 1130, 1800, 716kh, 86c, 453w
40960, 1160, 1800, 725kh, 86c, 455w
24000, 1050, 1500, 677kh, 82c, 422w
24000, 1050, 1500, 677kh, 75c, 402w24000, 1150, 1500, 704kh, 82c, 440w
24000, 1100, 1600, 670kh, 79c, 420w
24000, 1150, 1600, 615kh, 75c, 412w
24000, 1100, 1700, 688kh, 82c, 435w
24000, 1100, 1800, 704kh, 82c, 445w
24000, 1130, 1800, 728kh, 81c, 450w
24000, 1160, 1800, 712kh, 85c, 455w
8192, 1050, 1500, 662kh, 76c, 405w
8192, 1100, 1500, 662kh, 76c, 405w
8192 anything
11200, 1130, 1800, 725kh, 81c
11200, 1150, 1800, 725kh, 83c*Notes:
Red - Hashing but 0 accepts, nothing but HW errors
Orange - Power figures can be reduced by 20w when over 75c, as GPU uses more power when hotter
Test System ResultsThere's going to be variation on the wattage due to the fans running 100% and the temps running high because of stock cooler in a stock case. I estimate lower wattage draw with better cooling, as well as increased hashrate.
It's interesting to see the power use of these vs the MSI 280x's which draw 300w or less under full load.
UpdatesI swapped an MSI R9 280x into the test system, and put the TOXIC into the mining rack where the MSI was. Noticing immediate differences. The MSI, which was doin 740, can't break 665 on the test system. I will post full specs of the test system shortly.
The BETTER news--the TOXIC is reaching astonishing levels. Currently over 805kh at 70C with the stock cooler (noticeably loud though). This shows me the test system config doesn't do well with mining, as it provided low hash across 2 different cards. The test system is a desktop for someone else, so luckily they won't be using it to mine with.
Mining Rig SystemASRock 970 Extreme4, Sempron 145, HyperX 2gb ram, 1050watt psu
BAMT 1.1, Cgminer 3.4.3
3 GPUs
Mining Rig System Results so far: TC, Engine, Memory, KH, Temp (stock cooler, 88*F ambient)
24000, 1100, 1500, 760kh, 69c
24000, 1130, 1500, 770kh, 71c
24000, 1150, 1500, 760kh, 71c
24000, 1100, 1600, 715kh, 67c
24000, 1080, 1700, 750kh, 71c
24000, 1100, 1700, 763kh, 71c
24000, 1050, 1800, 751kh, 72c
24000, 1080, 1800, 773kh, 72c
24000, 1100, 1800, 785kh, 73c
24000, 1160, 1800, 805kh, 74cNote:
Purple - I'm going to keep running at this speed to see how things go.
Overall ResultsThe TOXIC performed far better in my dedicated mining rig setup, I presume something to do with the 970-EX4 being superior than its little cousin. These results weren't tested for hours for stability, but are based on stable results after letting it sit for short periods between each change. In order to make it to the results, there had to be 0 HW errors as well. I tried variations of these settings, but the results were negligible, which is why they didn't make the list.
It's worth noting the stock cooler does a decent job in an open-air setup, but sitting in a case it was choking (even with the case sides off). When the same card is put in a closed case with a Prolimatech MK26, it stays cool. I will be replacing these stock coolers with Prolimatech MK26 units.
As for what to use, if you want to play it safe, I suggest 1050 or 1080 for Engine, and 1500 for Memory. This should give you 750-760 without issues. For those among us who want to push it to the edge, take a look at the other settings.
Hope these results help someone.
More FollowupIt's been half a day and the Toxic is running great at 808kh, no issues.
Also I found out what caused the slow output on the test system, cgminer 3.7.x came with an older scrypt kernel. I use a tweaked/modified one (the same I use on my rig racks) and as soon as I copied it over, the test system started providing higher outputs. The MSI R9 280X went from 633kh to 735/740kh.
So.. mystery solved.
For anyone interested, here's the tweaked one:
scrypt130511Tahitiglg2tc24000w256l4.binCopy that overtop the one currently in your cgminer folder, and restart cgminer. Use 24000 for TC, and you should see good results. For 7950's, use 1130/1250 (eng/mem). Works for R9 280X's as well, I use 1080/1500 for my MSI's.