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Author Topic: Mining rig extraordinaire - the Trenton BPX6806 18-slot PCIe backplane [PICS]  (Read 155754 times)
rjk
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March 18, 2012, 03:11:42 AM
 #201

Jesus! you guys again with the BFL singles, sure they are pretty efficient but let's face it they are LAME, insipid. I like RJK's spirit he not only has the money to burn on this things but he also is doing it for fun (and space efficiency). 
Hehe, I wish I was rich, but I'm having to manage this a little bit tighter (I.E., not buying any more major components for a while Sad) But yes it is lots of fun playing with this hardware, and I just wish I had more time for it.

Mining Rig Extraordinaire - the Trenton BPX6806 18-slot PCIe backplane [PICS] Dead project is dead, all hail the coming of the mighty ASIC!
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March 18, 2012, 03:17:40 AM
 #202

Jesus! you guys again with the BFL singles, sure they are pretty efficient but let's face it they are LAME, insipid. I like RJK's spirit he not only has the money to burn on this things but he also is doing it for fun (and space efficiency). 
Hehe, I wish I was rich, but I'm having to manage this a little bit tighter (I.E., not buying any more major components for a while Sad) But yes it is lots of fun playing with this hardware, and I just wish I had more time for it.

And money of course.

I can't find the datasheet of the PSU i use (DPS-2000 BB) but i found it for a higher wattage model (DPS-2500 BB) and it scores platinum with 91% efficiency so i think mine must be somewhere around that hopefully, when i have the time i will calculate it amperimeter in hand.
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March 18, 2012, 03:20:25 AM
 #203

Jesus! you guys again with the BFL singles, sure they are pretty efficient but let's face it they are LAME, insipid. I like RJK's spirit he not only has the money to burn on this things but he also is doing it for fun (and space efficiency). 
Hehe, I wish I was rich, but I'm having to manage this a little bit tighter (I.E., not buying any more major components for a while Sad) But yes it is lots of fun playing with this hardware, and I just wish I had more time for it.

And money of course.

I can't find the datasheet of the PSU i use (DPS-2000 BB) but i found it for a higher wattage model (DPS-2500 BB) and it scores platinum with 91% efficiency so i think mine must be somewhere around that hopefully, when i have the time i will calculate it amperimeter in hand.
Holy crap the efficiency curve on that PSU is insane! I'll have to see about getting one to mess with.

Mining Rig Extraordinaire - the Trenton BPX6806 18-slot PCIe backplane [PICS] Dead project is dead, all hail the coming of the mighty ASIC!
minero1
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March 18, 2012, 03:23:27 AM
 #204

Jesus! you guys again with the BFL singles, sure they are pretty efficient but let's face it they are LAME, insipid. I like RJK's spirit he not only has the money to burn on this things but he also is doing it for fun (and space efficiency). 
Hehe, I wish I was rich, but I'm having to manage this a little bit tighter (I.E., not buying any more major components for a while Sad) But yes it is lots of fun playing with this hardware, and I just wish I had more time for it.

And money of course.

I can't find the datasheet of the PSU i use (DPS-2000 BB) but i found it for a higher wattage model (DPS-2500 BB) and it scores platinum with 91% efficiency so i think mine must be somewhere around that hopefully, when i have the time i will calculate it amperimeter in hand.
Holy crap the efficiency curve on that PSU is insane! I'll have to see about getting one to mess with.

oh and they are a lot cheaper too, you're welcome Wink
rjk
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March 18, 2012, 03:42:22 AM
 #205

Jesus! you guys again with the BFL singles, sure they are pretty efficient but let's face it they are LAME, insipid. I like RJK's spirit he not only has the money to burn on this things but he also is doing it for fun (and space efficiency). 
Hehe, I wish I was rich, but I'm having to manage this a little bit tighter (I.E., not buying any more major components for a while Sad) But yes it is lots of fun playing with this hardware, and I just wish I had more time for it.

And money of course.

I can't find the datasheet of the PSU i use (DPS-2000 BB) but i found it for a higher wattage model (DPS-2500 BB) and it scores platinum with 91% efficiency so i think mine must be somewhere around that hopefully, when i have the time i will calculate it amperimeter in hand.
Holy crap the efficiency curve on that PSU is insane! I'll have to see about getting one to mess with.

oh and they are a lot cheaper too, you're welcome Wink
Hehe, yeah  - thanks. From a quick search, I couldn't find a BB version of the 2500, only an AB version which is 48V. However, the 2000 will be fine and it is cheap, so I can fit several together. Looks like the necessary connections are discussed here: http://www.rcgroups.com/forums/showthread.php?t=1005309&page=41#post18117345

Mining Rig Extraordinaire - the Trenton BPX6806 18-slot PCIe backplane [PICS] Dead project is dead, all hail the coming of the mighty ASIC!
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March 18, 2012, 12:09:03 PM
 #206

800mhs ? , you can get ~750mhs at 1.05v on 5890, how can you expect any less than 1ghs on a 7990 ?  I'd aim for 1.4ghs or more...

Because the dual cards tend to be lower clocked and have less powerful VRMs (3 phase vs 4 phase).  A 5970 gets about 1.5x a 5870. A 6990 gets about 1.5x a 6970.  A 7990 then will likely get about 1.5x a 7970.  1GH/s seems likely.  With a heavy overclock maybe 1.2 GH/s.  Then again a rig of 18 cards is never going to be clocked as high as a single GPU rig.

I really don't like your trolling about 5970s ...

5970 easily gets 800 mhash/s in the hands of anyone that is semi capable in OCing and has a brain. Where the heck you get 1.5x Huh A 5870 gets 440 mhash/s so 1.5*440=660 which is incredibly low for a 5970. A much more realistic value would be 750 mhash/s for a 5970.

I don't know what your agenda is but you are probably worried about selling your stack of 5970s once the market is FPGA mostly or trying to get some cheap 7990s or some other fallacy.

I know for sure that the 7990 will get about 90% of the power of 2 full 7970s so 90/100*1400=1260. The 7990 will most likely get 1.25 ghash/s if you know what you are doing. Maybe even 1.3 ghash/s if you are radical a little bit. 7990 will surely get much more than a measly 1 ghash/s for sure.
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March 18, 2012, 12:22:19 PM
 #207

Quote
5970 easily gets 800 mhash/s in the hands of anyone that is semi capable in OCing and has a brain. Where the heck you get 1.5x Huh A 5870 gets 440 mhash/s so 1.5*440=660 which is incredibly low for a 5970. A much more realistic value would be 750 mhash/s for a 5970.

oh please do tell
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March 18, 2012, 04:03:04 PM
 #208

800mhs ? , you can get ~750mhs at 1.05v on 5890, how can you expect any less than 1ghs on a 7990 ?  I'd aim for 1.4ghs or more...

Because the dual cards tend to be lower clocked and have less powerful VRMs (3 phase vs 4 phase).  A 5970 gets about 1.5x a 5870. A 6990 gets about 1.5x a 6970.  A 7990 then will likely get about 1.5x a 7970.  1GH/s seems likely.  With a heavy overclock maybe 1.2 GH/s.  Then again a rig of 18 cards is never going to be clocked as high as a single GPU rig.

I really don't like your trolling about 5970s ...

5970 easily gets 800 mhash/s in the hands of anyone that is semi capable in OCing and has a brain. Where the heck you get 1.5x Huh A 5870 gets 440 mhash/s so 1.5*440=660 which is incredibly low for a 5970. A much more realistic value would be 750 mhash/s for a 5970.

I don't know what your agenda is but you are probably worried about selling your stack of 5970s once the market is FPGA mostly or trying to get some cheap 7990s or some other fallacy.

I know for sure that the 7990 will get about 90% of the power of 2 full 7970s so 90/100*1400=1260. The 7990 will most likely get 1.25 ghash/s if you know what you are doing. Maybe even 1.3 ghash/s if you are radical a little bit. 7990 will surely get much more than a measly 1 ghash/s for sure.

Except by your reasoning, a 5970 sucks because it ONLY gets 800 mhash, seeing as its a dual GPU board with two 5870s on it vs a 5870 doing 440. Also a 7970 doing 800 mhash uses far less power than a 5970 does and does not have special installation concerns (such as being a bastard that overheats, or requiring powered risers in installations of more than 2).

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March 18, 2012, 04:29:23 PM
 #209

800mhs ? , you can get ~750mhs at 1.05v on 5890, how can you expect any less than 1ghs on a 7990 ?  I'd aim for 1.4ghs or more...

Because the dual cards tend to be lower clocked and have less powerful VRMs (3 phase vs 4 phase).  A 5970 gets about 1.5x a 5870. A 6990 gets about 1.5x a 6970.  A 7990 then will likely get about 1.5x a 7970.  1GH/s seems likely.  With a heavy overclock maybe 1.2 GH/s.  Then again a rig of 18 cards is never going to be clocked as high as a single GPU rig.

I really don't like your trolling about 5970s ...

5970 easily gets 800 mhash/s in the hands of anyone that is semi capable in OCing and has a brain. Where the heck you get 1.5x Huh A 5870 gets 440 mhash/s so 1.5*440=660 which is incredibly low for a 5970. A much more realistic value would be 750 mhash/s for a 5970.

I don't know what your agenda is but you are probably worried about selling your stack of 5970s once the market is FPGA mostly or trying to get some cheap 7990s or some other fallacy.

I know for sure that the 7990 will get about 90% of the power of 2 full 7970s so 90/100*1400=1260. The 7990 will most likely get 1.25 ghash/s if you know what you are doing. Maybe even 1.3 ghash/s if you are radical a little bit. 7990 will surely get much more than a measly 1 ghash/s for sure.

Except by your reasoning, a 5970 sucks because it ONLY gets 800 mhash, seeing as its a dual GPU board with two 5870s on it vs a 5870 doing 440. Also a 7970 doing 800 mhash uses far less power than a 5970 does and does not have special installation concerns (such as being a bastard that overheats, or requiring powered risers in installations of more than 2).

Yes. All I care about is the $/MHash/s and density while I don't care much about the power costs. I am not one of those "in your mother's basement" folks FYI.

I bet people in Siberia will agree Cheesy It is also about availability as 5970 is not available while you would expect 7990 to be available soon etc.
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March 18, 2012, 04:36:46 PM
 #210

800mhs ? , you can get ~750mhs at 1.05v on 5890, how can you expect any less than 1ghs on a 7990 ?  I'd aim for 1.4ghs or more...

Because the dual cards tend to be lower clocked and have less powerful VRMs (3 phase vs 4 phase).  A 5970 gets about 1.5x a 5870. A 6990 gets about 1.5x a 6970.  A 7990 then will likely get about 1.5x a 7970.  1GH/s seems likely.  With a heavy overclock maybe 1.2 GH/s.  Then again a rig of 18 cards is never going to be clocked as high as a single GPU rig.

I really don't like your trolling about 5970s ...

5970 easily gets 800 mhash/s in the hands of anyone that is semi capable in OCing and has a brain. Where the heck you get 1.5x Huh A 5870 gets 440 mhash/s so 1.5*440=660 which is incredibly low for a 5970. A much more realistic value would be 750 mhash/s for a 5970.

I don't know what your agenda is but you are probably worried about selling your stack of 5970s once the market is FPGA mostly or trying to get some cheap 7990s or some other fallacy.

I know for sure that the 7990 will get about 90% of the power of 2 full 7970s so 90/100*1400=1260. The 7990 will most likely get 1.25 ghash/s if you know what you are doing. Maybe even 1.3 ghash/s if you are radical a little bit. 7990 will surely get much more than a measly 1 ghash/s for sure.

Except by your reasoning, a 5970 sucks because it ONLY gets 800 mhash, seeing as its a dual GPU board with two 5870s on it vs a 5870 doing 440. Also a 7970 doing 800 mhash uses far less power than a 5970 does and does not have special installation concerns (such as being a bastard that overheats, or requiring powered risers in installations of more than 2).

Yes. All I care about is the $/MHash/s and density while I don't care much about the power costs. I am not one of those "in your mother's basement" folks FYI.

I bet people in Siberia will agree Cheesy It is also about availability as 5970 is not available while you would expect 7990 to be available soon etc.

Well, seeing as in another 3-4 months, people will be able to buy 7970s for $350-400, and ye average used 5970 is around $350-400, and you're not factoring in the cost of slots (ie, switching to two 5870s, which cost of slots would be 2x for 5870s than 5970s or 7970s), so 7970s still seem to win.

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March 18, 2012, 04:57:52 PM
 #211

Well, seeing as in another 3-4 months, people will be able to buy 7970s for $350-400, and ye average used 5970 is around $350-400, and you're not factoring in the cost of slots (ie, switching to two 5870s, which cost of slots would be 2x for 5870s than 5970s or 7970s), so 7970s still seem to win.

Why would people be able to buy 7970s for so cheap if they are such great cards? If they are indeed crafted out of unicorns and awesome sauce, they should fly out of the stores and be subject to the same sorts of availability issues as the 5970 was.

Why would anyone pay such a high price for a used 5970? Just because they are offered at that price, does not mean they will ever sell for it.

But yeah, 7970s are good mining cards. It will be interesting to see how the market reacts.

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March 18, 2012, 06:12:54 PM
 #212

Well, seeing as in another 3-4 months, people will be able to buy 7970s for $350-400, and ye average used 5970 is around $350-400, and you're not factoring in the cost of slots (ie, switching to two 5870s, which cost of slots would be 2x for 5870s than 5970s or 7970s), so 7970s still seem to win.

Why would people be able to buy 7970s for so cheap if they are such great cards? If they are indeed crafted out of unicorns and awesome sauce, they should fly out of the stores and be subject to the same sorts of availability issues as the 5970 was.

Why would anyone pay such a high price for a used 5970? Just because they are offered at that price, does not mean they will ever sell for it.

But yeah, 7970s are good mining cards. It will be interesting to see how the market reacts.

Because you're comparing apples and oranges? 7970 is the single GPU card, its selling for $599 MRSP. The 6970 sold for $599, dropped to the $350-400 range after a few months, and the 5870 sold for $400 and sold for the $300-350 range after a few months. There is no reason to think the 7970 will also not drop in price.

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March 18, 2012, 08:16:09 PM
 #213

If the 7970 was sub $400 wouldn't the same logic make you think that used 5970s would also drop in price.  I mean all performance is relative right?

Of course with a lack of anything even close to competitive by NVidia I doubt AMD will feel the need to drop prices that low that fast.  Maybe sub $500 sub not sub $400.
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March 18, 2012, 11:15:57 PM
 #214

If the 7970 was sub $400 wouldn't the same logic make you think that used 5970s would also drop in price.  I mean all performance is relative right?

Of course with a lack of anything even close to competitive by NVidia I doubt AMD will feel the need to drop prices that low that fast.  Maybe sub $500 sub not sub $400.

Because the 5970s already did drop in price. Gamers are flooding ebay with old cards, irregardless of our little mining community. And no, the drop doesn't happen over night. I'm thinking months as in the 2-3 quarter type of outlook. They will be under $400 before 2013 rolls around.

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March 18, 2012, 11:34:32 PM
 #215

Those DPS-2000BB power supplies are a nice find.

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March 19, 2012, 12:20:50 AM
 #216

irregardless

tsk tsk

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March 19, 2012, 02:17:33 AM
 #217



lol

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rjk
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March 19, 2012, 12:31:52 PM
 #218

Those DPS-2000BB power supplies are a nice find.
Only problem I just discovered is that they do not have their own fans. So it will be necessary to hook up some fans to them so they don't overheat and die. Also, the 2000 watt version is less efficient than the 2500 watt version, and the 2500 watt version isn't for sale anywhere that I can find.

Mining Rig Extraordinaire - the Trenton BPX6806 18-slot PCIe backplane [PICS] Dead project is dead, all hail the coming of the mighty ASIC!
rjk
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March 19, 2012, 04:37:55 PM
 #219

Achievement unlocked: 3.3v. Even though the eBay seller sent me 12 AWG, I decided screw it, I'll use it. It doesn't match the 14 AWG for the rest of the connections, but meh it fit the spade terminals.
Next is to find some 26 24AWG 20 conductor cable for the signal connection. EDIT: Hmm I might have a parallel cable laying around somewhere...



Mining Rig Extraordinaire - the Trenton BPX6806 18-slot PCIe backplane [PICS] Dead project is dead, all hail the coming of the mighty ASIC!
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March 19, 2012, 04:50:16 PM
 #220

EVE female voice:  "Skill training completed"
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