is this the ryanwebber from florida that posted the scam listing for 2x 6990? if it is, i would like my money please
You were never scammed by these two accounts. Nice try though. too many scammers on here with too many accounts, i can't keep track of them all. how do i know ur not the same guy? other dude also scammed me of 2 6990, and is also from florida. btw, why are you helping this RyanWebber make everything right? he's the one that scammed people, why don't he take some responsibility and make thing right himself. |
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is this the ryanwebber from florida that posted the scam listing for 2x 6990? if it is, i would like my money please
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are you the same guy that scammed me over $800? can you please fukin pay me that amount back? and even if you're not him, can you pay me that amount back anyways for his actions? all scammers are the same to me. it left a really bitter taste in my mouth paying with non-reversible bitcoins to purchase items. that was my very first BTC transaction too  |
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for 700+ to 800+ , why not someone just buy a HD6990 insitead of 5970
it's not as easy to tweak 6990's memory down to the 300mhz range, and also it might be hard to find as well |
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I have a 1350W PSU running 3x6990 just fine. what's the PSU efficiency and how many watts are you pulling from the wall? It's an 80 Plus Gold rated supply (Enermax MaxRevo), so it should be pretty efficient. I wish I could tell you how much I'm really pulling, but I haven't bought a Kill-A-Watt yet.  one of the highest priced PSU and GPUs, yet you haven't bought a $15 kill-a-watt yet  |
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here's supposedly one of the higher end diablotek's PSU. this is the same unit that broke jonnyguru's PSU power delivery system. just read the review, the fact that this shady company will "cheat" and lie to customers about this PSU should be a big red flag to never trust any of their specs. http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story5&reid=187 |
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lol diablotek, one of the worst PSU brand you can buy. i would not use this in my system if it was given to me for free
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newegg had ONE open box one, but it looks like someone bought it
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yeah that motherboard i'm using is a bit expensive, i bought it new. it's a 7 pci-e slot board that costs $280, there's only 1 board that has more pci-e and that's the MSI big bang Marshal at $400. yeah that one extra pci-e slot is definitely not worth the extra $120. i think the most cost effective one is the 890FXA-GD65, has 6 pci-e slots for around $150. for anyone wondering what the OP is referring to, it's the motherboard and build from this thread: https://bitcointalk.org/index.php?topic=34174.0 |
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no point in making more than 8 pci-e, current drivers can only address 8 GPUs. boards with all 8 slots come with a price premium, just like a 6990.
for gaming, the bandwidth does play a small part in performance, but for mining or other distributed computing, pci-e bandwidth is not important. there are limitation to addressing full x16 bandwidth, that's why some gaming boards that has more than 2 pci-e x16 slots need a separate NF200 chip.
it's not worth it for motherboard manufacturers to make boards with 8 pci-e slots just to tailor it to miners because the demand for them is relatively small compared to the total motherboards sold for all other systems. it's nearly impossible for an independent person to make this kind of board themselves because it'll require a lot of equipment and resources/outsourcing to actually get it done. these custom boards will also carry a premium price for the amount of R&D that's required to properly make them.
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Sigh.... yeah, I'm fully aware of the limitations and I saw your thread before. I'm not asking about limitations or arguing whether the setting take or not.
I'm actually trying to get to these lower settings by flashing the bios. if you can point me to relevant threads of people who have done it, that would be more helpful. I don't need posts to threads on steps to flashing. already got those.
i actually went a step further than what i posted in that thread. the one i linked shows that it couldn't be done by software with all 4 of my different 6xxx cards, so i used RBE bios editor to manually decrease the memory clocks (leaving all other settings the same), then flashed it with the new modded bios and i get BSOD on all flashed cards. then i just flashed back to stock bios and quit. i read on another computer forum, something about the new 6xxx series that the engineers locked these cards, so flashing with "out of spec" bios will cause bsod. that probably explains why trying lower memory speeds way down will cause it not to stick to the settings only a few lucky 6xxx cards are memory flashable, so even if someone started a thread on a successful 6xxx memory flash, then it works for that specific card, but not the card you currently have. but if i do see some post about it, i'll post it here |
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6xxx series cards has problems when decreasing memory clocks or trying to flash them. only a few people supposedly unclocked them to the 200-300mhz range successfully, but for the most part you can't underclock the memory that low. that's why i stick to the 5xxx series for the easiness of tweakability. refer to this thread i started about memory underclocking for the 6xxx series cards: https://bitcointalk.org/index.php?topic=31013.0 |
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the top left corner of the motherboard has an offset mounting hole that is not above the frame, so i was not able to screw in some standoffs for this hole. instead, i just drilled a hole in the frame for a rivet, washer, and small black rubber piece to support the motherboard's top left corner. the motherboard doesn't actually screw down in the area, it just rests on top of this rubber disk  i cut a steel bar and added it to the bottom of the frame to support the front end of the PSU. after all the computer hardware is installed, everything will now be on top of the frame, so i can just lift it all up and move it if i have to. nothing rests on the ground anymore. i also drilled some holes for the two PSUs to screw into the frame  drilled some holes for a 2.5" hard drive  the two PSU's mounted and screwed in  you can see the 2.5" hard drive mounted behind one of the rear "legs". all the ugly blue labeling stickers were taken off at this point  the 2.5" hard drive i used is a 1000rpm WD velociraptor. yeah i know... it's overkill but it was a spare drive i had at the time  PSU, motherboard, and hard drive mounted  a view from the other side  @ stellan0r: i just saw pics of your rack. it's going to look like a beast with 12 cards mounted on top. how many PSU are you going to put on the bottom? https://bitcointalk.org/index.php?topic=7216.msg453266#msg453266 |
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finally had time to get some more work done this weekend. i'll post up the pics in a bit
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do you take bitcoins?  preferably paypal or amazon payments, but i guess i can take BTC or dwolla if it's more convenient for you. |
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lol it just amazes me the amount of scams going on in this forum. stop paying with BTC to new members with less than 30 posts. use BTC only to trusted members, and pay with reversible payments to new members. there's already a red flag when you look at his account history. he made this sale thread the same day he registered for an account on here. i'm sorry to hear you two guys got ripped off from yet another scammer
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20 BTC per card is a good price, if you do take that offer. but since you don't really take BTC, do you take paypal or dwolla? and do you ship to the US?
btw, this is in the wrong section. it's suppose to be posted in the "goods" section under marketplace
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mike, I hope to provide more info. I'm currently searching for the guide on how to flash the bios. for some reason, I'm having problems with underclocking memory on the 6870 in a system where I have 2 6990s + 1 of these 6870x2. I'm hoping to flash the memory to 350 and see how far I can push the OC then.
only some 6xxx series cards can underclock memory, some can't. have you tried underclocking the memory when the card is in the system by itself? i'm wondering if the inability to underclock memory is due to the card itself or if it's because the 6990 is also in there. |
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