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have to be careful using 16x to 16x risers with a jumpered slot, I just fried a 16x slot
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What motherboard are you using?
I run Windows 8 w/ 13.1 & 2.8
Im running a Lepa G1600 and working on trying to get 5 - 7950s working, up to 4 ATM, on it
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Actually I'm wondering the same.. I have to choose a HD7950 between these brands:
* MSI Twin Frozr.......$320....880Mhz
the Boost Edition is the $320 and runs at 960 / 1250 stock i hit 1050-1100 / 1350-1450 with these cards
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I wont debate the Win 8 vs Win 7, I have used both 8 and 7 before for mining rigs, I have seen no problems nor heard of any legit information saying theres a problem with 8. From what I have read in other tech site not forums, is there is no difference in the kernels as far as GPUs are concerned besides a few small additions hence why most drivers didnt not change from 7 to 8
I have tested all the cards in the primary pcie 16x slot, and ran them on another computer of mine, all cards show up in both systems Device Manager and in CGminer they all mine
The PCIe slots are Gen 2 and function as 2x16x, 1x8x, and 1x4x
In other posts these motherboards have been said to have 6 cards running on them.
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I AM ADDING A 5 LTC bounty to this
The system specs for above, Im helping Pete assemble this rig.
AMD FX 4100 MSI 990FXA-GD80 v2 5x MSI R7950 Twin Frozr 3 Boost Editions 16GB Crucial DDR3 1600 Lepa G1600 PSU 2 - 1x to 16x powered risers (I have more on order) and a bunch of 16x to 16x non and powered risers
I have tested the voltage levels, with a power supply tester all are within spec I am just running the cards when I got 4 to work in CGminer at stock speeds.
we are running Windows 8 x64 I haved tried AMD 12.8, 13.1, 13.4 drivers AMD SDK 2.7, 2.8 CGMiner 3.1.1
I have disabled everything that is not needed in Motherboard BIOS I have jumpered the 1x to 16x Risers, and I have tried with a 16x to 16x jumpered, every conceivable combination of Riser cables in the PCIe 16x and the PCIe 1x slots. I have the cards in my test bench raised above the motherboard, they are close together for right now, but I will build another chassis to spread them out.
In referencing the cards
#1 is in the Primary (Top Most) PCIe 16x slot #2 is in the Seconday PCIe 16x slot #3 is in the Third PCIe 16x slot #4 is in the Fourth PCIe 16x slot #5 will be used in one of the PCIe 1x Slots
I start out with 2 cards in the primary 16x slot and secondary 16x slot and once that works I add the 3rd card in the 3rd 16x slot The bottom slot (16x) seems to be a pain, as getting it to show up in Device Manager sometimes it does and doesn't, after I get the third card to work I have got the 5th Card in the top most PCIe 1x slot to show up in Device Manager, but the 4th card wont show up, and or vice versa
Before I try CGminer I look for the cards in Device Manager, and we Pete and I have read tons of Posts,
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DO NOT buy into this bullshit. It's a get rich quick scheme for idiots! ROYAL idiots!
Don't get ROYALLY fucked in the ass with this UNCREATIVE B.S.
says the man with Chinacoin as username Hmm?
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a good case flows air better than an open air scenario, but the problem is spacing the GPUs apart which becomes an issue when you use more than two cards as most are double slot cards and if theyre stack right next to each other they will get hot
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ok after some research thru the forums I installed cgminer into a new folder and I running it seperate than my BTC one, not sure why but requires a tiny space so added the 2 commands to the .bat file setx GPU_MAX_ALLOC_PERCENT 100 setx GPU_USE_SYNC_OBJECTS 1
ran cgminer for a few minutes and got my thread concurrency from the .bin file name now coinotron is reporting ~560KH/s much greater than 80KH/s tweaking my gpu and memory speeds and now my rig is using 4gbs of system ram
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I am getting the same types of results when I switch from BTC mining with cgminer to LTC mining. On my test machine with 1 7950 cgminer shows 630KH/sec but coinotron, notroll, and kattare all show no higher than 80KH/s
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I used to love PC PnC PSU until they got bought by OCZ now I use Corsair and I love my AX1200i
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I'm going to run a rig with 2 7970s, and I'm going to run 1x4GB stick (the exact one you have actually).
Mining doesn't really need RAM. So long as the OS can operate on 4GB of RAM, 1 stick will be just fine.
LTC scripting does use RAM https://bitcointalk.org/index.php?topic=163306
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Solar Panel? lol you'd spend a fortune to get one big enough to use even if you lived in Phoenix AZ
Power Rates depend a lot on where you live in the world, I am currently paying .0803 kw/h + taxes
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Few questions. Anyone mine NVC? I was wondering if anyone had some recommendations in terms of a cheap mining rig case. I have everything except the HDD // case/build platform.
ASUS M5A99FX PRO R2.0 AM3+ AMD 990FX SATA 6Gb/s USB 3.0 ATX AMD Motherboard with UEFI BIOS
AMD FX-4100 Zambezi 3.6GHz (3.8GHz Turbo) Socket AM3+ 95W Quad-Core Desktop Processor FD4100WMGUSBX
GIGABYTE GV-R795WF3-3GD Radeon HD 7950 3GB 384-bit GDDR5 PCI Express 3.0 x16 HDCP Ready CrossFireX Support Video Card
CORSAIR Vengeance 8GB 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model CMZ8GX3M1A1600C10
Rosewill BRONZE Series RBR1000-M 1000W Continuous@40°C, 80Plus Bronze Certified,Modular Cable Design,Active PFC
What is a safe platform to build my rig on? Thanks for any advice. I ultimately want to put 3 more 5,6,or 7XXX cards on this rig.
Of course this is all my opinion: Mobo: good CPU: good GPU: good but i prefer the MSI R7950 TF ed RAM: Good but spend a few xtra bucks on the 2x4GB DDR3 1866s if nothing else but for resale value PSU: buy a gold or platinum for the extra wattage you get, i personally love the new i series (AX760i /860 /1200) from Corsair the monitoring software saves me a lot of time when i am OCing plus they're highly rated PSU's and you get more REAL watts out of them, that Rosewill will only give you 850w usable under full load manufacturers wattage ratings are like car manufacturers EPA gas mileage ratings, usually not that accurate especially under >85% load
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if you have free electricity than you can use it to mine ltc profitably.
borrow your neighbors >
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I just started mining bitcoin last week. With my current computer, I am only get about 130mhash.
I am thinking of customizing a mining rig with the best video card on the market. My budget is around $2000.
Please don't tell me to buy ASIC from BLY or Avalon, BLY is not even delivering, Avalon is not even selling now.
My logic of making a gaming machine is that, in the event that it is no longer profitable, at least I still own the machine and can play games with it. If I buy bitcoin now and the price drop, I am going to lose everything.
Can someone please guide me or recommend me?
For example:
Best motherboard:
Best RAM:
Best graphic card:
etc…
I really appreciate your input trying to help a newbie like me.
AMD 990 Motherboards brands is your choice, but my preference has always been ASUS or MSI RAM depends on what you are planning to mine. BTC mining is just GPU dependent so it doesn't really need a good CPU or RAM, LTC mining uses your RAM and from what I have been reading requires about 8 GBs id spend a few bucks and buy some Corsair DDR3 1866 sticks, if for nothing else better resale I have been getting 605 MH/s (BTC) and 640KH/s (LTC) using the MSI R7950 Twin Frozr at 65C @ 4500RPMs, MSI uses good quality parts and their cooling is very good ((see link in post above)) and also remember these suck about 250w of power each if you are using 3 or 4 cards you will need to use PCI-e riser cables see http://www.cablesaurus.com/I only use Corsair PSUs as I have had a great track record with them for myself and my customers, I build/repair systems as a business, plus I love the new i series PSUs being able to monitor the voltages live makes OC'ing a shit ton easier. Another thing to consider is most PSUs are rated at 80%+ so if you have a 850w PSU that's only 80% certified its only going to give you 850*.8 = 680 under full load, so always check your PSUs rating, as once cheaper PSUs warm up their efficiency drops like a rock. So look for Gold or Platinum PSUs Windows is easier in my opinion (i know windows well) but costs $100, where if you know Linux it can save you money
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LOL I was wondering why I couldnt reply, and I assumed it was IE10 since that damn browser doesnt like anything. T
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