Bitcoin Forum

I have a chance to get a HD 5850 Black Edition for $75. Is this a good thing?

Thanks!

I would think so...most are going for $110 -$139 on ebay

cool.

I think I might be able to get two ATI Sapphire Radeon 5830 for $100.

Anyone else have opinions?

post is mostly to get to my 5 count. I apologize if this is frowned at.

Yeah it's a good deal. I would buy it and then sell it on ebay to make some money though

I hope to build a x2 rig soon.  I agree and think its a good deal though.

nice, it'll pay itself off in no time  :)

very cheap... I wouldn't past this up at all.

i wouldnt either pass this opputuinty

Hi! I think that it might be becoming obsolete when the new Butterflylabs ASICs come out. I think they might raise the difficulty up by a lot. so you should just get a BFL Jalepeno from butterfly labs for 150 USD it has I think 3.5 Gigahash of processing power.

Sorry if my English is bad lol

Yes,  If you already have the other necessary hardware. There is a good chance it would pay for itself before the difficulty skyrockets.

Mining Calculator
https://tpbitcalc.appspot.com/

Hardware Comparison
https://en.bitcoin.it/wiki/Mining_hardware_comparison

good price

Just be sure they aren't scammers, ask for pictures of the cards with a paper with their name on it and date.  You could take it a step further and search their user name on the forums and ebay.  This is all if you are paying bitcoins for them, if you are doing paypal, you don't have as much to worry about.

That sounds like a good deal. Most are going for 100-150 on ebay.

What everybody else said, good shit deal.

I'm getting a 5870 for 125 tomorrow, I recommend just saving that 75 and buying a BFL Jalapeno though.

Awesome deal! Go for it!

you got it ?

where did you bought ?

bought 2 5850's for 300, so I say your getting a sweet deal!

Hell yeah, a 5850 for $75 will be nice to use for a couple months till difficulty goes up and then u can sell it easily on Craigslist or Ebay and invest in some new tech!

Goodluck

Make sure you can try it before buying or it come with some warranty, then its good price, otherwise not

Got it off Craigslist. It came with an aftermarket heatsink -> http://www.newegg.com/Product/Product.aspx?Item=N82E16835186046

it runs pretty well... I think. Getting an average of 326 M/hash using cgminer.

I am not sure if the previous owner installed the heatsink correctly because GPUz is reporting high temps on GPU #2 and GPU #3

Should I redo it?

Also, on cgminer it seems like the "--gpu-engine" AND "--gpu-memclock" flags aren't being applied. No matter what I change them to GPUz reports 775/1125 for speeds.

Anyone know how to fix this or if I am doing something wrong?

No doubt. I made the guy show me it worked before I purchased it.

http://i46.tinypic.com/34qqqvq.png



are these acceptable temps?

Looks like a good price to me.

Also, Why does cgminer say my average hash is 335.6 Mh/s, but P2Pool says it's ~270 Mh/s?

Seems like a pretty big difference to me.

The "~" number is averaged over a short period of time based on submitted shares. It will fluctuate above and below your clocked rate. In the long run your "~" number will average out the the clocked number.

I use AfterBurner for my GPU temp monitoring but if the 66 degrees is your temp that is fine. If it is the 100+ listed under GPU #2 that is too high. I have a 7970 OC'ed to 1110 mhz and I have a custom fan profile set to keep it less than 78c (get artifacts above there on that clock). Would see if you can get a custom fan profile loaded.

Man I would seriously increase your fan speed !!! I would start at 40% and raise it till it gets to noisy. I just use CGMiner no Afterburner and my 5850 is stable at 875/500. A thing to try would be to run Afterburner or Sapphire Trixx and do a reset on the card. Restart your rig and see if it OC's. Thats what worked for me.

Wow,up the fan speed until your temps are about 70c  ;)

107c is melt down temp  :(

too much

I don't know - I am not holding my breath on the BFL shipping dates - so you might actually be better off buying it, ordering the jalapeno, mining the Radeon, sell the radeon when the jalapeno arrives.

At least thats the way i am playing it to hedge my bets..

That's a deal I would take, even if it were just to sell them on eBay for a profit.

Great deal for the 5850! I've got 3 running in 1 rig, putting out 285 mhash @ 0.95v running @ 750/250 each.

wow thats great with $75.Last time I found was $310.