guys I'm looking to buy some cards r9 280x or 750ti What would you advise?
Depends.... 750Ti's are good at the moment but there is not much to mine with them so if the few profitable coins die they will be useless. Much more stuff to mine with 280x's and if you get them used they can be a good deal. I have a lot of 280x's and some 750Ti's and I can tell you that 750Ti's dont have much of an advantage in powersavings actually. If you know what you are doing you can get your 280x's running at 0.756V and they will be on par with the 750Ti on energy costs still pumping out more Khashes.
If you are just starting it's probably not the best time to enter anyway...
My experience show the opposite opinion. I don't have 280, but I have 7950 and 290x. I don't bother attaching KillAWatt meter to 750Ti -- just feel the temperature and you know it is not burning. No external fans, no noise, I am super happy so far, even I did not make ROI so far on 750Tis -- I haven't made ROI on any cards yet, but mining itself is fun.
How long have you been mining? I got my 750ti rigs about 3 month ago, paid 2.4 btc per rig (6x750ti, they are more expensive here than in the us) and I'm geting really close to return the invest ( 1.94 btc per rig after electricity expenses).
But, the fun is priceless
I started about Jan in LTE/DOGE rush, and graphic cards are very expensive around that time because of shortage. I got my two AMD 7950 Saphhire cards for about 600USD each at that time... those two cards are just laying on the bench now. Then got four MSI 290x cards. Then 25 750Tis.... I love 750Tis!!! Then ASCI minders -- had one AnitMiner that was dead last weekend and in negotiation with the vendor now. I stopped after my wife call me crazy, LOL.
The thing is that, I have other things to do, busy at work, etc. So I don't have time to always pay attention to the miners. Sometimes miners dead and I don't know too much about -- I had some monitoring script written but sometime it is kernel crash. Mined with DOGE and be a true believer of that coin and community for long time -- still haven't sell any DOGE yet, and even bought some to support the community, but look at its market price, I may change my mind half a year later,
. I was fooled around by many new scam coins as a newbie, and mined quite some of them which worth nothing now. So these days I switched to IPO coins and follow ccminer's path. But my problem is that, don't have energy to follow all those coins price and almost always miss the time to dump. Bet on MaruCoin (first X13) now it is dead, bet on HVC (since someone swear they will 'hold like a boss', LOL) and now it is worthless. Only exception is that, I think I missed the time to dump JPC -- and don't know abut its price start climbing. I haven't follow the JPC ANN on daily basis and missed the wallet upgrade (they said will fork at block 6000, so I kept the old wallet) and work on a wrong fork for about a week! Well, I still have 13M JPC at hand, which may be the only bright spot so far, LOL. So mining for profit needs lots of energy and dedication,
.
To confess, I now mine VirtCoin now. Old coin, but I like the dev team. Not profitable, but ok, I feel safer there.
Now I adapted to the game and after being educated by scam coins, :-). I do believe what Chris did is right, for most of IPO coins, dump at high price is the right approach. Multipool exists for a reason -- scram coins feed them. But most important of all, i now stopped dreaming and start appreciate the technical fun I had in this journey. Still remember days to manually flash BIOS, etc. I am a software not hardware guy, but building rigs from scratch is some interesting experience -- yeah, I almost burned one card, LOL.
In the future, may be more interested in GPU programming and crypto world. Checked out the git repository of bitcoin, and may want to take a look at source level when I find some time later. And may use those rigs for 3D stuff when i am not mining in the future.
As I said, not mining purely for profit now makes me more relaxed and appreciate the experience itself. Yep, expensive tech toys, I know.
