I arrived at that number by trying different values until I could get cgminer to start I think I'm hitting maximum RAM use perhaps, though maybe I could increase it slightly. First, the "Usable" configuration has thread-concurrency at 17920. That might seem like a pretty simple configuration for some, but let me run through some of the specifics. Here are the two nf files I'm running on my "daily use" PC: The Intensity 13 version gets about 10-15% less hashing performance, but there's a catch: I'm using practically all of the GPU's 3GB of RAM! With a single thread, I get around 330kHash, but with two threads I'm at 510kHash. So, I have two folders, with two different CGminer configuration files: one for when I'm not using the PC, and the other for when I'm working.
If you're not using a PC that's mining Litecoin, you can go for Intensity 20, but for a PC that you're actually trying to use for other things you'll never be able to use it properly with Intensity more than 13. I also use it to surf the web, email, write, etc. My main PC has a single 7950 in it, and I game occasionally on this system. As I already have three other Radeon 7950 cards, you'd think I have a decent handle on settings by now, but I'm still tweaking and learning. (As far as I can tell, that's the stock clock and not the Boost Clock.) They're available for $300 each, and they come with the Never Settle Reloaded bundle of Bioshock Infinite, Crysis 3, and Far Cry: Blood Dragon - you can typically get close to $50 for the bundle via eBay. Here's what I ended up doing to get there.įirst, my latest HD 7950 cards are from Sapphire, this time the dual-fan model with a stock clock of 925MHz on the cores. Well, I suppose it can be, but don't expect it to happen by just running with the default settings. If you look at a list of scores, for example this list, you might think hitting 600kHash is trivial. I detailed most of the hardware in my previous post, but this time I wanted to provide some clear steps and settings for mining that get close to 600kHash/sec on a single 7950. So I have a few Litecoin mining rigs running, and the latest has three Radeon HD 7950 cards in it.