I noticed better Mhashes with linux. Perhaps its the drivers? On Windows 7, i am running everything at minimal, in which i mean the aero visuals and animations are turned off.

Cleaned my case and cleared the cable clutter. It seems better now. I've removed my Hdds except for the SSD.

If i read correctly, i don't have to register or make my presence known to receive the subsidy?

All i have to do is mine under p2pool?

Thanks bangra. I have removed the side panel from my casing, Silverstone TJ08-E and temps are around 80 Celsius.

Will try lowering the clock speeds and see how it goes.

By the way, how would i set to spin down the HDD when the system is not in use in LINUX? I'll be running the miner under linux after this. The distro would be Xubuntu.

Hey guys, so i just received my used HD 6990 yesterday, and was messing with the mining softwares and options. Decided to go with cgiminer. At the moment I am mining under windows, however when i am out of the house (usually 4 days per week) , the miner would be running under linux.

Below is the screenshot:



I am currently mining under the pool :mining.bitcoin.cz

Both GPUs clock has been set to 900MHz with the bios switch turned on.

Memory has been set to about 450MHz.

Fan is running 100%

Room temps varies from about 32+ Degrees in the afternoon - 29+ Degrees at night. I am from Malaysia.

Is this setup efficient enough? Is there anything wrong that you guys could grab from the output of cgminer?



Edit: Should i underclock my CPU / any other components to promote more power usage efficiency?

Currently on my rig:

i5 2500K Processor @ Stock @ 3.333GHz
1 Samsung 1TB Sata HDD
1 Seagate 1TB Sata HDD
1 Corsair Force GT 120GB SSD
2 Artic F12 PWM fans
1 Noctua NH-D14 CPU cooler

(I could unlink all drives when i am running under linux using a pendrive , as mentioned above, when i am out from my house, usually 4 days in a row)

If that is the case, then i shall do some more research on obtaining a PSU and to stick within my budget. Thank you very much for informing me.

I don't have any reps nor references in this forum, as far as i know

I have references from my local forum in case if you're interested. I usually buy and sell computer parts over there. Most of the deals are done via COD. At least when I am selling something as I don't prefer sending an item via courier.

However, if the loaner wants, he could send the funds directly to my paypal account which is linked directly to my bank account. Perhaps as a security measure? If not, perhaps there are others ways for me to prove myself? I agree with the 4 months part, but i'll try. Until then i'll run my card on the 700W psu.

Well guys, I got a really good deal on a HD6990 that is USED for 7 / 8 months for about USD $483 . It should be arriving sometime next week. (This is because of the holidays due next week in my country).

Now, after spending some money, I realized that the recomended PSU is 750W, however mine is just 700W. I am using a Corsair GS700 series PSU. I know it would power the HD6990 fine, however I wouldn't be able to overclock the card. I would need some loan to buy a  "XFX 850W Black Edition Modular PSU" for the HD6990 to suck on.  It is currently priced at about USD $180.

I shall be paying you monthly. Either in USD or BTC. The interest rate would be yours to decide. I plan to finish paying the loan in about 4 months. This will be quicker of course when I sell my current PSU.

Any takers?

**[No Longer Required] **

Hey guys, So i pulled a trigger on a USED $483 HD6990 being sold locally. it should arrive tomorrow, hopefully.

I would still be using my rig for college work and to watch movies, so i guess running under linux coin / headless linux is out of the option? I am home only twice a week, other than that i'll be at my other home , nearby to my college. So perhaps when i am not home, I could run it under headless linux and when i am home, run it under Windows. I am using Windows 7 Ultimate X64 at the moment.

What miner would be the best for hd6990? I tried reading previous threads but most were a few months old. Maybe its because the search is not returning what i am looking for? I learned that the memory should be downclocked to 300MHz, while I could overclock the card as much as I want right until its no longer stable and / or its temps are too high.

Is there a specific mining pool to join? Making a quick buck / profit isn't on my mind, but i am hoping that i would generate enough hashes to pay for the card. At least so I could get my "investment" back and then perhaps use the same amount of money to invest again. What about the flags / parameters that I have been hearing alot about? Is there a guide on how it should be set?

Also, what is the recommended driver version for the HD6990 that should be used in both windows and linux?

Its being shipped locally

The seller is from my country as well. And over here, there is no tax for importing electronic / computer related parts / items.

Thank you though. I shall be pulling the trigger on this one.

Well, just got a deal on a used HIS HD6990 @ USD480

I am from Malaysia by the way so the 58xx series of cards are hard to come by. The card is about 6 - 8 months old.

Would this be a good buy? I am planning to run it under linux coin with a USB pendrive, however I am not sure of what miner to use. Also the options to set on the miner for the best optimization. What would you guys suggest?

Ah i am sorry. Looks like staying up late into the night has caused my calculation skills to deteriorate. I'll reconfirm the local prices and get back to you.

Thank you very much for your post. Its no problem replying as I am learning too.

Usually shipping charges are absurd here. I could import the components from the USA but once they get here, the price difference would allow we to purchase a higher grade card. This is perhaps because computerized parts aren't taxed here so there is no benefit in importing components from around the world unless shipping charges are minimal and the unit is a second hand being sold at a very low price.

I too am waiting for Goat's offer and see if I am able to get those cards off his hands.

Sure, if the price is right, I am all for it.

Sent you a PM.

My board is a MITX form board so it has only 2 16x slots and 1 4x slot. Perhaps you're right. I'm better off getting a 58x0 series card for the time being. I'll look around and try to locate the sellers.

I may be wrong in assuming this but with the 6990, I would still have a PCIE slot open, so a future addition of a card would still be possible. With 2 X 58xx series, first I would have to hunt for the card if i am getting it second hand. Then the issue of warranty comes up as most of these cards are 1 / 2 years old. To hunt it in retail outlets would be difficult as well since they don't really keep stocks on old cards and thus the ones that they have , are priced where I would be better off getting a 6990. However, I may be wrong in my assumption and you or anyone else are more than welcomed to post a correction

Thank you. Thats the current issue. The interest with the amount of loan + the period of payment. The loaner doesn't have to loan 100% of what i am asking. He could loan me whatever he can, as long as its 50% of the initial asking loan, and I'll settle the rest.

The $900+ Rig was built according to my set budget.
The 58xx series of cards are rather rare now. Perhaps I would have to visit the mall to check out if they have them in stocks. (The cards aren't listed on their price list). Tried searching from our local auction site, and the ones I could find are rather outdated in its pricing where if 2 were purchased, I could pay for a brand new 6990. What i am referring to is the 5870. Unless the 5870 x 2 is really much better than going with a 6990, then perhaps I could try hunting for it. However, since my board is a Mitx,it would be able to support a max of 2 cards. I was thinking that the 6990 would be a better suitor should i want to add an additional card.

Yes, I have the capital to pay for the card(s). However, at the moment, I don't prefer to drop it all at once. I would like to take a loan and pay back steadily as I progress. Of course if it doesn't work out my way, then I would have to pay everything in full, which is not a problem.

For the time being, While the machine is hashing, there wouldn't be any / much of gaming time.

Here is the payback formula. (Its going to be a long one)

1. The rig will be stationed at my home town.
2. I will be at another state (1 hour away from my home town) for college from Monday - Thursday.
3. The rig will be monitored via VNC / remote desktop. Should the machine crash, there will always be someone at home to reboot it for me.

According to my previous thread, these are the calculations:

The average Mhash would be = 750 according to https://en.bitcoin.it/wiki/Mining_rig
Power Consumption should be around 469 Watts according to http://www.hardwarecanucks.com/forum/hardware-canucks-reviews/41404-amd-radeon-hd-6990-4gb-review-21.html
Add 60 more Watts for the overall computer usage and it is 529 Watts in total.

Now according to the calculator with the current difficulty @ 1307728.3606
Exchange Rate @ $5.40333

Now lets do some math (Also, if you have not read / missed it, I am from Malaysia)

Our formula = Electricity charges - bitcoin generated per month (according to the calculator) = profit / loss

So lets do it.

529 Watts / 1000 = 0.529 * 24 Hours =12.69 Kwh * 30 days = 380.88 Kwh per month

Local charges for 380.88Kwh = RM 109.35 OR 35.96 USD

Calculator @ http://www.alloscomp.com/bitcoin/calculator.php says

I'll be making $97.07 per month. So $97.07 - $35.96 = $61.11 (17.54 Bitcoins) of profit per month.

Because of stale/invalid shares (taken as an advice from another member), the amount would be somewhere around $91.

Taking his view into account, $91 - $35.96 = $55.04 per month or about 15.79 Bit coins per month (According to the current exchange rates. Might be more / less depending on the conversion rate in the future)

Depending on the amount of loan given, my priority would be to pay the loan back as soon as possible. As I have mentioned, the latest would be in 6 months. Even if the profit doesn't accumulate to that amount, the loan will be paid in 6 months. It will not escalate.

Now, with the amount earned of 15.79 Bit coins per month, 15 Bit Coins would go towards the loaner and I would keep the .79 . The rest would depend on the interest that the loaner is asking for , and further calculations would ensue.

There wouldn't be any source of income, however I am working on running a seedbox service (In the final stages now) to provide some financial support for me while I am in college. I ran the same service while I was in college (Diploma) and sold it off when I started working. Now that I am back to college, I plan to start the same service once again. The capital for the seedbox service has been provided for and wouldn't interfere with my mining project. However that wouldn't be my source of income to pay back. I have some savings in my bank that I saved from my salary and it is more than enough to pay for the loan.

You might be wondering, Why not just use the funds instead of taking a loan? Well being in the position that I am, it would be quite risky to dump the full amount of money right away as emergencies might occur. That is why I am seeking for a loan, so I could pay for my project in smaller amounts.

Edit : Taking that into account, by the end of the period, the loaner would receive 90 Bitcoins by the end of 6 months. If the loaner has loaned 100% of what i am asking for, that would make him short of 10 bitcoins. As per my previous post, the loaner will receive 100 bitcoins by the end of 6 months being the bulk of the loan will be settled by the end of the 6 months. This would of course vary, depending on the interest that is imposed by the loaner.

True. I am sure over the time, with tweaks / overclocks too , the yield would be more.

Your 2nd calculations according to the calculation on my previous thread seems to be about right. Also, do note , that I am not going to be paying you back with the profits incurred. I will be using half of the profits + my own money to pay you back. So worst case scenario, you will get back your money + interest in 6 months time. Best case scenario, and we make some profit you'll get your money quicker + the interest.

The reason why i want to partake such methods is that I am interested in bringing up the community over at my country, Malaysia. Since I am now doing my Degree in Security, perhaps I could intergrate my assignments with the concept of bitcoin as well. Maybe start a club / organization and show people what it takes to do this. Then maybe we'll get more people mining and thus building a community over here.

Of course with the profits, we could help some students with loans as well to get started. Maybe get a professor involved if he / she is interested in this concept. The possibilities are endless but to achieve all that we would need somewhere to start and this is it. Of course i understand that the loaner would have to think twice about getting his principal in 6 months time , however he will be paid monthly based on the profits made. Regardless, he will be paid. There will not be any deferment of payment.

What do you guys think of my proposal?

Once you've made your payment in bitcoins, you will be emailed a link (URL) with a username and password.

The link is a web interface of Rtorrent. You would be given a file manager where you could manage your downloads.

Basically, you could download public torrents on a high speed connection (20 - 30 times faster than a standard home connection) or seed torrents from private trackers just because you want to build that ratio / extra buffer.

The service gives you an option to pay per day / week / month. If you guys are in, i could post some screen shots and device the pricing plans.