7x35, 6x30, etc - have to keep the multiples of 5 on a 750ti or it ignores the configuration -l= part

Your card should have the same hashrate on any coin that uses the same algorytm (like scrypt, X11, sha256, etc).

With a GPU though don't even bother looking at any SHA256 (Bitcoin/etc), Scrypt (Litecoin, Doge, etc) or X11 (DASH, etc) coin as all of those algorytms have ASIC miners aroudn in large numbers that blow away ANY GPU so badly the GPU just loses money.

I get about 17 on stock bios at 1100/1500

Sometimes due to how the memory timings table is set up, slower runs FASTER.

There are a series of them.
One series for the 290 one for the 290x.
Irritating part is the numbers are interleaved for the 2 series.

Each V number within each series is in order on "setpoint for core voltage", but I forget which end is the higher setpoint offhand.


Try the litecoin forums, they had the "reference" post TheStilt wrote about which bios is which, and I recommend downloading all of them (they're small) then try each one out in decreasing voltage order 'till you get to one that isn't stable.


 They don't do much if anything about reducing power consumption (the faster memory timings appear to drive that up as much as the dropping the other parts drives it down) but the cards run a LOT cooler and you can overclock them without massive overheating issues.

they have to match the 5 SMX units for the 750ti

1x5, 2x10, etc.

Otherwise that parameter gets ignored.

For perspective - I moved out of an area that had appx 8c/kwh electric cost most of the year because that was TOO HIGH for long term profitability and ability to reach ROI.

 Short term, there's a couple of GPU coins that are profitable at 12c/KWH electric - but you lose almost HALF of your income feeding the power company even with efficient mining setups and that profitability is likely to keep dropping.

 *ALL* of the major farms I am aware of are in areas with electric in the 6c OR LESS range, usually 3c or less.

 Perhaps XMR then.

Give up the idea of mining DOGE - it's nothing more than a "merged mining" coin, most or all of the hashrate on it is from folks merge mining it from Litecoin 'cause DOGE isn't worth hardly anything any more.

 Founders edition on ANY Nvidia 1xxx series card costs more, clocks lower, and has inferior cooling to pretty much ANY aftermarket design.

 290s don't exactly run cool either, but I think you've got the "best bet" layout for reducing overheat isues you CAN do with those 4 cards.

 Have you flashed them with "TheStilt" BOIS yet?

 I look into my crystal ball and the reply is "answer hazy, too many variables to KNOW".


 Just because ROI doesn't manage 1-2 months (or even 6-8 months in most cases) any more doesn't mean mining is dead though.
 It just means it's a high-risk VERY high yield investment instead of a high-risk CRAZY HIGH YIELD investment.


 12c/KWH though is a VERY HIGH electric rate to try to mine at - most options for mining WILL lose money with that kind of rate, and the others that CAN make money won't make nearly as much when you're feeding the power company 50% or more of your gross mining income. It's less of a factor if you have to heat, as it will offset some or all of your heating bill, but most places that's only PART of the year and some places it's a very SMALL part of the year.

 IMO if your power costs much more than 5c/KWH don't plan on achieving ROI on any current coin. If you plan to get the system anyway, mining to help pay off PART of the cost of the system makes sense even at that 12c/KWH the other poster talked about, but NOT for serious long-term intend to make money miners.


 Block halfing does NOT "decrease the supply by half" - it just reduces the rate the supply is ADDED TO - which is minor any more for Bitcoin as over 75% of all Bitcoin have already been mined.

holes on the heatsink use a standard 92mm fan, and doesn't have to be super-high flow.
Actual power usage is under 45 on all of mine, more like 40 even on the no-fan ones, using bricks I got from Zoomhash.

You need to put a big thermal transfar pad between the PC board and the heatsink and screw them together - that the ONLY cooling the chips get, and they will NOT stay cool without good solid thermal contact.
IMO the termal design of the "blades" was very very poor.

 Also check into the threads on litecoin talk and here about adding heat sinks to the regulator circuitry - or UNDERCLOCK the board - that was the biggest fail point on these miner boards.

For a 4-GPU no riser build like Phillip, you NEED to go with blower-style cards. Fan type won't cool well enough (except the one card of the 4 that does NOT have another card blocking it's fan, THAT card you could use a fan-type card on).

 Don't go with "founder edition" cards, their overall cooling is widely reported to be fairly poor.

If you already have the I5/I7/etc makes sense to use them - but if you don't, consider you can mine with a GTX 750ti at ballpark 240h/s using HALF the electric for ballpark $100 *NEW* cost.


That 7950 is going to eat a LOT of electric, you won't see 2 month ROI on it. 4 perhaps - which would still be better than paying too much for a high-end CPU to mine on.

HDs don't take much power - and that's been DROPPING over the years.

 I just wish Seacrap hadn't bought out WD years back, and that WD hadn't bought out HGST (the quality doesn't SEEM to have dropped on those YET, but I'm worried about a few years down the road).

 Titan X is Maxwell, original Titan I think was next older generation (Kepler?), Titan X Pascal is ... Pascal!

 No Titan model is a good hash/$ choice though if you already have the card no reason to not try to use it.
 They're way too much about "bragging rights" and you pay a major premium for that.

 Cure payouts haven't been a problem. But there's more to it than that on FDLC.
 Just tried a new setup about a week ago though, will have to see how that works.

 Once a month payouts though are a sad joke. That sort of thing makes me wonder how long FDLC will even exist.

 

 Any Gigabyte model - they're very good about using BB fans on everything and have been on "go to" lists for years as a result.
 Any Sapphire model - I've never seen a sapphire model that does NOT use BB fans and have never had one die to date (have had a couple last so long they got to be useless due to badly outdated performance).
 I've had good luck with EVGA so far and they do design the cards to last.

 Asus and MSI have generally good reputations as mining cards, but I've not owned any of either of those myself.


 To the 7-card person - I've never heard OF "Galax" "iGame" or "Dark Alliance".
 I'm not sure if I've heard of "Inno3d"

 No specific information about Zotac, but their rep has been spotty so far from what I HAVE seen - some good some bad.

If I could ever get the merged folding stuff to WORK, I probably would move the 9xx rigs over.
I've been TRYING to get it to work for months not, and NOTHING to date.

I was aware the number of FLDC was higher, just have no clue about the relative income from each at this point.

Thinking about it, but if I move soon to the area I really WANT to be in, they'll actually be profitable (for a short while).

Free power often is limited in how MUCH is available - at which point a multicard GTX 750ti rig might make a lot more sense for XMR (240H/s with GPU-Z indicating 56% TDP used at consistant 100% GPU load is nothing to sneer at given the very LOW TDP on those cards).

 I AM curious about 1070 hashrate on XMR though, haven't seen ANY figures to date just "doesn't work" complaints.