I have some bitcoin that I'm planning to sell, but with people seemingly having problems with all the major ones and I keep reading "scam this" and "scam that" about everything, I get a bit unsure of which one to use. Which one would you guys recommend? Mtgox? Bitstamp? Something else?

Don't know if this has been brought up in the thread already, but say that someone transfers money to my paypal-account and then as soon as I see the money I withdraw them to my bankaccount, is it still possible to reverse the transfer?

I have some coins to sell and I would like some advice on where to sell them.

I've previously sold some coins on both mtgox and bitstamp, but I'm not so sure about doing it now that they require verification. Not feeling to keen about having to upload a photo of my ID card.

Selling on ebay is of course an option, but that has other downsides to it.

Are there any other trusted btc exchange sites out there that still don't require verification?

Just switched to this pool and trying to get things going, but for some reason when I try to start mining I get "errno 10061", what's that about?

I'm using the latest version of guiminer and I've installed the stratum proxy. Also, I'm mining on a dual-GPU card if that matters(5970).

Updating this thread again. Just tried to reformat the drive and did a fresh WinXP-install and the first thing I did was to install Catalyst 12.1(with the included SDK) and nothing else.
Then I started GUIminer and set it up just like before, and guess what? THE F***ING PROBLEM STILL REMAINS -_-.

What the hell could be the problem? Could one of the cores on the card be broken? Or could the problem lie with the pool rather than my computer? Or could it be some strange setting that I'm unaware of?
 
Might try installing Ubuntu instead and see if I can get it to work there.. If not I think I'm gonna sell the 5970 and get a good singlecore-card instead..

I'm starting to consider installning Ubuntu on the server instead and see if I can get it working properly there.. Anyone else running Ubuntu with a 5970?(or any other dual-GPU card for that matter?)

I've tried this now and my problem still remains... I also tried installing 2.1 in a different folder and it didn't help.

I think I'm gonna give up on this now since nothing I do seems to work. When Win8 comes out I'll be getting a new computer with it, then I'll probably install Win7 on the server instead and then I'll see if I can make it work on both cores. In the meantime I'll just have to settle with one core..

Ah, ok, I shall do it this way instead then. Which .msi-file is it exactly? SDK_dev?

I uninstalled the drivers then deleted the one opencl.dll I could find and then I installed 12.1 with the included SDK.
Now as soon as I start mining on the second core the entire system freezes..

I have tried 12.1 and it doesn't help.. It doesn't seem to matter what drivers and SDK I use, both the CPU-bug and fluctuating hash rate remain.. And I've tried many different drivers and SDK's now..

Does anyone have any other idea of what could be causing my problems?

As far as I can tell 2.5 isn't available for WinXP. 2.3 seems to be the newest version for XP.

I've tried both 12.1 and 11.12 with SDK 2.1 now and it didn't work... Still 50% load on the CPU and still fluctuating hash rates.. I'm really getting tired of this **** and I'm about to give up... And before you ask, yes I used Driver Sweeper to uninstall the drivers.
Maybe I should try a different miner? Highly doubt that'll work either though..

Then I'm gonna give 11.12 and/or 12.1 with SDK 2.1 a try. Thanks for the tip. And yes, I do have in fact have a dual core CPU(C2D).

As I wrote in the main post, 11.10 and SDK 2.1. When it comes to the CPU it maintains about a 50% load.

My GPU's maintain about 60-75% activity. And yes, its a dedicated mining-server at the momemt, so I'm not doing anything else on it.
Tried only running one core again and then the activity goes up to around 96-98%. Strange..

I don't think my power supply is the problem. Its a 650W 80+ gold FSP power supply which should be more than sufficient.
And I have checked all temps with GPU-Z and nothing is above 90C.

I have a Radeon 5970 in my server that I'm using for mining, but I'm having some issues with it. At first I had problems getting both cores to work, but I seem to have fixed that now. The problem now though is that the hash rate is fluctuating a lot between about 170-350Mhash/s on each core. Shouldn't it be more stable than that? When I try mining with only one core its a lot more stable and stays at around 340-350Mhash/s.
The GPU's are at stock-speed(725MHz) and I haven't done any clocking other than underclocking the memory to 500MHz(wont go lower than that in either CCC or MSI Afterburner).
Should also mention that I'm using WinXP 32bit, Catalyst 11.10 and Stream SDK 2.1. And I'm using GUIminer with phoenix to mine.

Also, I'm currently using these flags:

-k phatk VECTORS BFI_INT FASTLOOP=FALSE AGGRESSION=7 worksize=128

For some strange reason I get the highest hash rate when I set AGGRESSION to 7, any other number and hash rate drops.

Anyone have any idea of what could be the problem?

I finally got both cores to work! Switched back to 11.6 and installed Stream SDK 2.1 and now it seems to work. Although, the total speed constantly fluctuates between 400-700Mhash/s.. Shouldn't it be more stable? What could the problem be? Flags?

I'm using these flags at the moment:

-k phatk VECTORS BFI_INT FASTLOOP=FALSE AGGRESSION=7 worksize=128

Anything I should change? I've tried AGGRESSION=11, but for some reason I get a higher Mhash/s with 7?

I have a 650W 80+ Gold power supply, so I don't think I have insufficient power. And I haven't overclocked anything. The only clocking I've done is on the memory which I've underclocked to 500MHz.

I've made some progress with my issue now. I've installed Catalyst 12.1 and now both cores seem to work, but when I start mining on the second core I get "Verification failed, check hardware" after only a minute or so. What the **** could be wrong? Perhaps I should keep trying different drivers?