Thanks for the help, guys. I see I have a typo in the EDIT I did in the first post. It's supposed to be 4.1, not 14.1.

So, I've been mining scrypt steadily @ 140 kh/s on my 1Gb Asus 5770. This has been going great for many months, with no HWs. I have the Catalyst 13.1 display-driver and SDK. Doing the switch to x11 have proven tricky. I've tried seven different versions of sgminer, based on 4.1, 4.2 and 5, and they all give me HWs and no accepts; some more HWs, some less. The high-speed version from Lasybear seems to work the best, with the first HW coming after apprx 5 min on I 15 and 900 kh/s.

I clocked the card incrementally down to 150/225, to no avail. As in scrypt, the thread concurrency offers the most at exactly 7860, and in- and decreasing it by six orders of 64 made it go slower and did not help with the HWs. Regulating intensity does not affect the HWs.

I've tried with different kernels, including darkcoinmod and x11mod, but to no avail. I tried x13 as well, but the HW-problem persists.

{
"pools" : [
   {   "url" : "stratum+tcp://eu.wafflepool.com:3331",
      "user" : "x",
      "pass" : "d=0.01"
   }
]
,
"intensity" : "13",
"vector" : "1",
"worksize" : "256",
"kernel" : "x11mod",
"thread-concurrency" : "7680",
"lookup-gap" : "2",
"gpu-threads" : "2"
}

Edit: So, I finally did some reverse cogitation and installed the 14.4 drivers on top of the 13.1s. Getting 750 kh/s with Laybear's x11mod. The Sph-b2 is slow, around 250 kh/s, but HW-free as well. The heat still keeps my small flat nice and warm, but less so than before. The original 14.1-release BSODs, and the four others give HWs.

I tried it on my Asus 5770 1 Gb with bitblockold. About 20 HWs/s. .conf:

"intensity" : "11",
"worksize" : "256",
"kernel" : "bitblockold",
"lookup-gap" : "2",
"thread-concurrency" : "7680",
"shaders" : "800",
"gpu-threads" : "2",
"gpu-engine" : "850",
"gpu-fan" : "0-0",
"gpu-memclock" : "1200",
"gpu-memdiff" : "0",
"gpu-powertune" : "0",
"gpu-vddc" : "0.000",
"temp-cutoff" : "95",
"temp-overheat" : "85",
"temp-target" : "75",
"api-mcast-port" : "4028",
"api-port" : "4028",
"expiry" : "28",
"failover-switch-delay" : "60",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"log" : "5",
"no-pool-disable" : true,
"queue" : "1",
"scan-time" : "7",
"tcp-keepalive" : "30",
"temp-hysteresis" : "3",
"shares" : "0",
"kernel-path" : "/usr/local/bin"

Yes, that link worked.

Yea, I wasn't planning on auto-selling, but rather to have the alphas ready to sell at a favorable price, either in my wallet or at the exchange. Doesn't seem like the automatic payot threshold kicks in, though. I surpassed it some twelve hours ago.

Hey. I mined them at stratum+tcp://alf.smalltimeminer.com/3335. None of the client download links on https://bitcointalk.org/index.php?topic=230868.0 work anymore, including the Mega one. I guess I figured out how to send the alphas to crypty, though, putting the trade-adress from Cryptsy in the payment-field under settings and setting the automatic payout threshold just above.

Well, I mined some alpha coins, but there is no client for windows to be found. Can I do anything with these coins, except donating them, from the Small time miner alpha coin pool?

Thank you for the reply, Gator. I've tried GUI-miner with the same result, as well as EasyMiner, same result there as well. The 7650GS is made by Nvidia, though, so I guess OpenCL would not factor in. I'll give bitminter a shot.

CGminer registers with the servers I specify, but does not start mining. What to do?

Running quad-core core2, nvidia 7650GS GPU, registered with Eclipse and Triplemining.