Which Card Has The Fastest ROI?

[crazyates]

They both have 1120 SPUs. The 6870 starts at 900mhz, while the 5830 starts at 800mhz (but can OC into the high 900s. I ran mine at 980mhz).

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[AndrewBUD]

I run one at 1080mhz..

all 6 of my 5830's have a max overclock of around 940-950

[Desolator]

Lol, guys, come on.  The GPU has almost nothing to do with overclocking.  It's the power quality on the board and the manufacturer of the card makes the board.  MSI and Sapphire for example will overclock so much higher than most others regardless of GPU model.  My 5830 Sapphire Extreme Edition with better voltage control than the standard card ran at 1040MHz stable @ 61C for about 11 months then I sold it.

Apparently the new MSI Lightning 7970 poster that they sent my shop doesn't reside anywhere on the web or I'd show it to you.  Anyway, it has zero voltage variance.  That means no opening and closing of the circuit with a voltage regulator or passing along messed up power.  You can overclock it to the freaking moon!

EDIT: FOUND IT! http://event.msi.com/vga/lightning/r7970.html#Unlocked

[AndrewBUD]

That's pretty sweet.^


All my 5830's are sapphire xtreme versions and they don't overclock very well IMO..

[crazyates]

That's pretty sweet.^

All my 5830's are sapphire xtreme versions and they don't overclock very well IMO..

Mine was a Sapphire Xtreme, the one that went to 980.

[420]

6870x2 is more rare than a unicorn (including horses with toilet paper or paper towel cylinders taped or strapped to their heads)

[Desolator]

That's pretty sweet.^

All my 5830's are sapphire xtreme versions and they don't overclock very well IMO..

Oh, I forgot that the PSU is a huuuuuuge part too.  I was using a 900W 80+ silver certified PSU which at 550W draw still measured at 12.15V.  If your PSU is feeding in the power at 11.5V under load, your GPU is not going to overclock very high.  The only problem is, paying for a high end power managing card and an amazing PSU costs about as much as just buying a much better GPU, lol.  I got the PSU for $90 as a return at a local PC shop.  It's worth like $175 or something lol.  Btw it's for sale at the moment

[betatest512]

i am mining with a MSI 6670

[Berni]

5870/5970 are in my opinion the best and they
Are cheap. (So Long there are no asics)

[Desolator]

I just ran the numbers and it looks like the 5870 is indeed the best bang for your buck.  It could make around $50/mo approx and you can get a used one for just over $100 on ebay.  That's not bad!  The 5970 seems difficult to cool and even runs really hot stock and thus it's difficult to overclock so yeah it's fast but it's extremely expensive and you can't get it a whole lot higher necessarily.

[Shermo]

I got a 7950 to stick in my work PC for the next couple of months, cost me £220, should hopefully earn £80 - £100 before its no longer worth running even with free electricity... then I will sell my 6870 from my home PC and hopefully it should work out as a pretty GPU upgrade for my gaming machine, probably just £50 difference

[420]

I just ran the numbers and it looks like the 5870 is indeed the best bang for your buck.  It could make around $50/mo approx and you can get a used one for just over $100 on ebay.  That's not bad!  The 5970 seems difficult to cool and even runs really hot stock and thus it's difficult to overclock so yeah it's fast but it's extremely expensive and you can't get it a whole lot higher necessarily.

5970, yeah look at my temps (video):

https://bitcointalk.org/index.php?topic=115621.0

[kwoody]

BTCFPGA has FPGA's in stock, and they will offer a trade-in program to go from FPGA > ASIC. This might be your best bet to get in the game now, at low power usage, and trade-in the FPGA for full value on an ASIC. 6 months from now, mining will only make sense with ASICs.

[420]

BTCFPGA has FPGA's in stock, and they will offer a trade-in program to go from FPGA > ASIC. This might be your best bet to get in the game now, at low power usage, and trade-in the FPGA for full value on an ASIC. 6 months from now, mining will only make sense with ASICs.

unless a protocol change

[legolouman]

While risky, nothing will replace 5970's for ROI. If you look hard enough, you can find stable-ish ones for ~200 USD. I didn't do any math, because the actual ROI depends on your electricity rates.

With that said, the ROI is probably longer than the borrowed time most GPU's are running on. ASIC's are slated to begin shipping very soon.

[420]

While risky, nothing will replace 5970's for ROI. If you look hard enough, you can find stable-ish ones for ~200 USD. I didn't do any math, because the actual ROI depends on your electricity rates.

With that said, the ROI is probably longer than the borrowed time most GPU's are running on. ASIC's are slated to begin shipping very soon.

shameless promotion....win 3x5970's for 1BTC:
https://bitcointalk.org/index.php?topic=116893.msg1251772#msg1251772

[legolouman]

While risky, nothing will replace 5970's for ROI. If you look hard enough, you can find stable-ish ones for ~200 USD. I didn't do any math, because the actual ROI depends on your electricity rates.

With that said, the ROI is probably longer than the borrowed time most GPU's are running on. ASIC's are slated to begin shipping very soon.

shameless promotion....win 3x5970's for 1BTC:
https://bitcointalk.org/index.php?topic=116893.msg1251772#msg1251772

Man, let me just withdraw a little bit from GLBSE. Oh wait.

[Aahzman]

with underclocking the ram, i was able to get my 6770 up to 960Mhz....getting about 210Mh/s out of it.

[Frequency]

. ASIC's are slated to begin shipping very soon.

 first they have to CREATE an fabric out of some 2nd hand manchines..

https://forums.butterflylabs.com/content.php/120-BFL-Invests-in-Assembly-Equipment

but ontopic, 5870 if bought 2nd hand are quick ROI get 400mhash out them, also 5970 are good to use but for now i d say waite untill december...or perpared to take loses if investing now....ASIC 

[tacotime]

well, i've paid for my 3x7950 rig mining litecoin for a few months.  all profit from here on out.