Guess the difficulty will be going back up.

Yeah, for me, 1.5 is faster than 1.6.2. I'm clueless as to why.

Good point but I'm not planning on mining with this machine. If I were, it'd be AMD.

It's coming down to GPU. I have the option of getting either NVIDIA GeForce GT 540M or the AMD Radeon HD 6490M

I can either get a
HP Pavilion DV6-6155CA for $720
MSI FX620DX-256US for $730
ASUS A53 Series A53SV-XN1 for $750

Each has:
Intel Core i5-2410M 2.3GHz 3MB L3 Cache Turbo Boost up to 2.9GHz
6GB DDR3
640GB or 750GB HDD
1GB GDDR5 video memory


The Asus has 1 year of accidental damage warranty which is pretty nice but otherwise I can't really decide. The HP looks better and has a fingerprint scanner. Otherwise it's coming down to the GPU. What do you think?

Strange issue that started a few days ago. I mine all night and at some point through the night, one client/card stops mining. It stays on the shot where it's generating xxxmh/s and shows the shares and rejected but does not update. On the pool side, I only see half of the mh/s I normally get so I know the card is not working.

All settings are the same as they've always been, just started a few days ago and has been fine for weeks.

Any ideas?

1040/300 is the clock. xfx 5830

So shouldn't we see improvement in mh/s over 1.5 vs 1.6.2?

Does 1.6.2 use these mods?

further improved phatk OpenCL Kernel (> 4% increase) for Phoenix - 2011-08-11
http://bitcointalk.org/index.php?topic=25860.0

I started using 1.6.2 over 1.5 and haven't seen any increase.

Wahoo!

It's happening again. My card running at 1040/300 is doing about 333mh/s yet only had 3 accepted whereas my 958/300 card is going at 307mh/s and had about 50. I just restarted my computer and ran AOCLBF again. They're currently neck and neck at 4 each. We'll see what happens in a few hours.

meh, even my new one can get 307mh/s which is pretty good considering the card cost $100.

I'm at 1040/300 and getting 330mh/s. I can still do a few kernel upgrades and I think I can keep increasing the freq.

it's not happened since. Now I've been overclocking my 5830 to find the breaking point. My newer 5830 is 958/300 whereas the older version is up to 1040/300 and getting 330mh/s.

I ran them both at 958/300 before and was getting very similar results. Last night was the first time where they varied so widely. I ran it again and it was much better.

Even now, one card is running 307mh/s and has 3400shares whereas the other card running at 330mh/s is at 3700 shares. Not too far off considering the hashing difference.

I'm currently running 990/300 with 1163mV (stock) and getting 316mh/s.

Still need to modify the kernel to get a few more out of it but I'm going to guess at this point I'll hit 320mh/s no problem and may even be able to go higher.

I've got two 5830's both overclocked to the same specs and both get about 305-307mh/s stable.

This morning, I woke up and saw that card A only had 1238 accepted shares while card B had 2311 accepted shares. I see both are chugging away at 307mh/s.

... What would cause this?

check BIOS settings?

Check for motherboard BIOS update
What PSU are you using? What cards?
What OS?

Try also running CCC 11.7?

Sounds good. I've just seen a lot of high performance rigs selling WITH crossfire cables on. (ie looking at the photos)

we've had a bunch of loooong blocks recently

I have 0 and 3 though. Are they the locations of the PCIe slots?

I wish I could justify buying $900 per card. In this BTC economy, not sure if it'd ever be worth it. I'll stick with my 2 5830's that I snagged for $100.