If you're getting $200 max a month for 2 more, then I would actually consider buying.
Why? Say the next generation comes out in 4 months. Let's say you get $150 a month average (I'm guessing - you said up to $200).
So $150 x 4 months = $600 (income) - $400 (from depreciation) = $200 in profit.
- Average is $150 (change whatever average the real number is); if the average is more than $100, I'd buy
- Next gen is up for sale in 4 months (this is a random guess and it could be later or earlier)
- Crypto currency crashes. If it crashes, obviously you have lost your investment.
- The combination of the GTX 770s and the next generation of GPUs could force a greater than $200 deprecation compared to current prices. This could be especially true if the next generation of GPU is very powerful - we're talking 5870 over 4890 type gains.
If the currency does crash, sell the GPUs immediately if you do buy them. Holding will only depreciate further. 4 way crossfire is not that useful in gaming. For most titles, 4 way crossfire does not scale the way 2 way does and is a pain to work with (driver issues).
Well, on the note of if the currency does crash, I suppose you could try to mine something else.
Also, if your PC setup looks like this, then keeping the GPUs for purely gaming is justifiable:Edited by CrazyElf - 6/2/13 at 12:42am