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Economy / Service Discussion / Ask Amazon if they take BTC
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on: April 04, 2013, 04:59:13 AM
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I sent Amazon a message today asking if/when they'd start taking bitcoin as payment, and mentioned bitpay as an option that's even cheaper than credit card merchant fees. Here's what they sent me:  If you can take the time, please go to your amazon account some time this week and send a question in about bitcoin. Obviously they are reading their mail. The best way to get them to take it seriously is to have the customer base asking about it. Cheers. |
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Bitcoin / Hardware / Is there something missing from this picture?
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on: March 29, 2013, 04:44:44 AM
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 No, but really, thank you Josh for filling in the blanks tonight. Here's a quick transcript: Well guys, I had planned on updating everyone with a video of a board hashing here in KC tonight, but I haven't been able to get that together yet, so I'm probably going to have to push it off until tomorrow. We are targeting a start of shipment next week, but I'm not quite ready to commit to that at the moment, given our past estimates. It's imminent, though.
I know Chip Geek, I'm going to try to ship out a unit ,at least one, before APril first if it's at all possible.
Chip Geek, I'm not sure. We may miss our power targets, that's been part of hte hold up... we think there's a problem with the power consumption and we're trying to figure out where it's having an issue. However, in the interests of time, we are going to be shipping what we have and going back and fixing while we are shipping, just so people can have their units. People are welcome to wait for the revised boards that should help out with the power issue if they want to delay their shipments... (heh, riiiight).
The power is still far less than any other unit, so it's not like it's something crazy or anything, but it's not 1w/GH and we're trying to locate the source of the power drain. It may require a revision of the substrate and/or the PCB.
Haha it's WAYYY less than 620 watts even at it's worst.
What's causing even more consternation is the fact that the wafer we burned for tests runs at far less power than a second wafer we mounted on the BGA package... so it may be a wafer by wafer thing, and sicne we only have two datapoints, it's hard to nail down the issue. We're rolling the other 4 wafers off the line shortly (they may be done already I think) - and that wil at least give us an idea of the power consumption between wafers with 6 data points.
Bogart, the rest of the 6 wafers, we have been holding off on the last 5 layers for the rest of the chips to be sure we don't need to make a tweak in the metal layer due to the power issue. I think we've pretty much settled that hte power issue is NOT in the chip, but somewhere in the substrate or PCB (or if it were in the chip, it's not something that's easily and quickly fixed).
Barrett: Depends on the power draw, it may be that the power draw is too high for the board and we need to scale the hashrate back. If that's the case, we'll send multiple units to cover the hashrate difference for orders.
SgtSpike: We are trying to nail it down. We have some boards at 1.76w, some at 2.5 and some at 4 and one at 6 <- although I think the ones at 4 and 6 have either a broken power regulator and/or a bad power brick, because they power brick is only 120w and it's drawing like 195 watts which is ridiculous. When I get hte firmware here in KC, I'll be running it off of an ATX PSU to eliminate the power brick as the culprit. So you see, this is why the power issue is causing some difficulties
Yes, I'm aware that Bitcointalk trolls will have a field day with everything I've just said. Heh. Even a broken power regulator and a bad power brick is still better than an Avalon, but in all honesty, at this point with bitcoin prices at 90 bucks a coin, I'm thinking no one is going to care at hte moment they just want to hash. Which is why we'll be shipping and then improving as we go.
If the cooling becomes an issue, like I said, we'd scale it back and ship multiple units.
Smith88: We will ship whatever we have to to get people hashing at their expected GH.
Lap_Rat: No, worst case is 195w, but the power systems on the board aren't rated to handle that really I don't think, so we'd back off the hashrate before we'd let it get that high.
Yeah I think 120w is a nice comfortable number. It can probably got a bit higher than that, but 195w is probably not where we want to be.
https://forums.butterflylabs.com/vbshout.php?message=&username=BFL_Josh&hours=&from%5Bmonth%5D=2&from%5Bday%5D=20&from%5Byear%5D=2013&filter%5Bshout%5D=1&chatroomid=0&orderby=DESC&perpage=100&s=&do=archive&instanceid=1 |
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Economy / Computer hardware / [WTS] 6x 7970s and 5x 1xPCIE risers
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on: November 05, 2012, 12:45:13 AM
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General Information for the video cards for saleAll of these cards are part of my mining operation. Because I'm transitioning to ASICs, I'm selling off these cards. These have been in operation for around 2-3 months. All of them mine at around 650MH/s at 1100Mhz core clock and 1050Mhz memory clock, and with proper cooling they all do so at around 73 degrees C with fans between 45% and 60%. They can also all mine Litecoins at around 500KH/s using the above settings (and possibly more with tweaking). Prices below are assuming $13.50 per BTC - fluctuations in price will be taken into consideration when purchasing. These have never been run over 76C, and have never been run with the fans over 85%.ShippingShipping is only included for the US (48 contiguous). For other places, I'll get a quote and you'll pay a bit more (I'll subtract what it would cost to ship to Texas). Gallery: http://imgur.com/a/IPuzs    3x Visiontek 7970s (used)Bought from Tigerdirect in the last few months. Here's a product page for Visiontek 7970s on Tigerdirect: http://www.tigerdirect.com/applications/searchtools/item-details.asp?EdpNo=1817062All of them come with all original accessories in original box. 3x @ 24 BTC each shipped (with accessories)1x Diamond 7970PE53G 7970 (used)
Bought from Newegg about 4 months ago.
Comes with all included accessories and original box.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814103201
34 BTC shipped1x XFX 7970 (used)
Similar to this:
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=2618331&CatId=7387
Just the card - no extras.
25 BTC shipped1x Sapphire 7970 (used)
Similar to this:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814102961
Comes with all included accessories and original box.
25 BTC shipped2x 1xPCIE Risers (new in sealed anti-stat bags)
0.3 BTC each shipped
3x 1xPCIE Risers (used - working pulls)
0.2 BTC each shipped"How can I trust you?"- I'm a long-time eBay user, and I've sold quite a few items there. I'd be happy to send you an eBay message from my account (400+ positive feedback).
- I've sold a few items on this forum (Steam games), and have received positive feedback.
- I've gotten positive feedback on Heatware. http://heatware.com/eval.php?id=81637
Thanks for looking! 
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Economy / Marketplace / Steam Games for BTC (DIRT, Deus Ex, Nexuiz, Sonic)
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on: September 07, 2012, 10:58:16 PM
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I'm selling the following Steam games for BTC: 2 BTC gets you a copy of all four. PM me if you're interested. If you want proof that I'm honest I'll gladly message you from my 10-year-old 400+ feedback ebay profile, would just need ebay username. Update: Found some more licenses! |
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