When is the 7990 supposed to be released? - page 2.

DeathAndTaxes

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Gerald Davis

Quote from: ?? on ??

7970 can get you 675+ Mh/s and you can buy them today for $560, that is $0.83 per Mh
IF (a big IF) 7990 can be pushed to run at 1350 Mh/s, the price per hash works out to $0.63 per Mh. Even then, 5970 is a king (if you have it).

5970 does about ~1.7x a 5870. A 6990 does about ~1.7x a 6970. Thinking you will get 2.0x performance from a dual board is unrealistic. The last two dual boards (5970 & 6990) used 3 phase power instead of 4 phase power. The VRMs, power connectors and cooling systems were not designed to handle 200% of single card performance. Sure you can overclock & overvolt a 5970 but you can overclock and overvolt a 5870 higher.

675 MH/s * 1.7 = 1150 MH/s and even that is likely pushing it. I think 1 to 1.1 GH/s is more likely for stable 24/7 operation.

Still the first "gigahash" class board is pretty cool in its own respect.

this time

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No way a 7990 gets 1350 mh/s. We can dream though.

irobindotse

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I think ATX standard needs to be updated. Nobody really needs 8 expansion slots but they could use 5 expansion slots spaced wider apart.
[/quote]

Amen for that! Cheesy

DeathAndTaxes

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Gerald Davis

Quote from: rjk on February 24, 2012, 09:26:17 PM

Quote from: DeathAndTaxes on February 24, 2012, 09:23:48 PM

Quote from: rjk on February 24, 2012, 09:20:53 PM

Quote from: cuz0882 on February 24, 2012, 09:00:12 PM

Hopefully the fan design looks more like the 5970,

Why? The better design is the 6990, which doesn't cook the second GPU by blowing hot air over it.

That's debatable. Dumping hot air back into the intake path of other cards so same hot air can be recycled over and over and over.

Would be nice to see AMD use a out the back design but a split air path where air is split half passing over each core.

I guess I get stuck in the thinking of open frame miners, and keep forgetting that there are people that used enclosed cases Grin

Ideally the GPUs and their heatsinks would be offset so that the air would blow over them in parallel. But that is difficult is such a small space.

EDIT: I just saw that you already said that. Great minds think alike? Tongue

Yeah but I doubt they will do that. Most "sane" people buy 1 or less 7990 so the recirculation isn't that much of an issue.

I think ATX standard needs to be updated. Nobody really needs 8 expansion slots but they could use 5 expansion slots spaced wider apart.

rjk

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1ngldh

Quote from: DeathAndTaxes on February 24, 2012, 09:23:48 PM

Quote from: rjk on February 24, 2012, 09:20:53 PM

Quote from: cuz0882 on February 24, 2012, 09:00:12 PM

Hopefully the fan design looks more like the 5970,

Why? The better design is the 6990, which doesn't cook the second GPU by blowing hot air over it.

That's debatable. Dumping hot air back into the intake path of other cards so same hot air can be recycled over and over and over.

Would be nice to see AMD use a out the back design but a split air path where air is split half passing over each core.

I guess I get stuck in the thinking of open frame miners, and keep forgetting that there are people that used enclosed cases Grin

Ideally the GPUs and their heatsinks would be offset so that the air would blow over them in parallel. But that is difficult is such a small space.

EDIT: I just saw that you already said that. Great minds think alike? Tongue

DeathAndTaxes

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Gerald Davis

Quote from: rjk on February 24, 2012, 09:20:53 PM

Quote from: cuz0882 on February 24, 2012, 09:00:12 PM

Hopefully the fan design looks more like the 5970,

Why? The better design is the 6990, which doesn't cook the second GPU by blowing hot air over it.

That's debatable. Dumping hot air back into the intake path of other cards so same hot air can be recycled over and over and over.

Would be nice to see AMD use a out the back design but a split air path where air is split half passing over each core.

rjk

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1ngldh

Quote from: cuz0882 on February 24, 2012, 09:00:12 PM

Hopefully the fan design looks more like the 5970,

Why? The better design is the 6990, which doesn't cook the second GPU by blowing hot air over it.

cuz0882

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Is there still no word on the release date? Hopefully the fan design looks more like the 5970, I still don't even see any pictures released yet.

DeathAndTaxes

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Gerald Davis

Quote from: malevolent on February 14, 2012, 07:07:02 PM

Thanks for clarifying but I'm still not sure how much load can my circuit sustain, saw 16A labels on my sockets, I'll have to ask the owner of the house

btw. made a mistake, 16A not 15A

The CIRCUIT is 16A. Go to the circuit breaker turn off one 16A breaker. Every outlet that stops working is on THAT CIRCUIT. The Circuit can't have more than 16 amps. It doesn't care if you put 16A in one outlet or 5 amps in 3 outlets and 1 amp in a 4th. When the entire circuit >16A the breaker will trip and everything (which may be a half dozen outlets) connected to that circuit turns off.

malevolent

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Thanks for clarifying but I'm still not sure how much load can my circuit sustain, saw 16A labels on my sockets, I'll have to ask the owner of the house

btw. made a mistake, 16A not 15A

DeathAndTaxes

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Gerald Davis

circuit =/= outlet

you may have 3, 4, 8 outlets all on the same circuit. If it is a 15 amp circuit then all combined load of all outlets on the same circuit is limited to 15A.

Generally circuits shouldn't be loaded more than 80% for continual loads.

So a 30A 240V circuit is good for 30*240*0.8 = 5.76KW.

malevolent

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To people with 30 or 60A 240V circuits... not sure if I understood but does that mean you can draw up to 7.2kW or 14.4kW from one socket or from all sockets in one room (same circuit)..?

I can draw max. 15A*230V from each of my sockets (=3.45kW) but not sure if it was all right if I loaded all sockets in my room (or at home) like that.
Not really a problem with 2.2GH/s now (~1.3kW I think), maybe up to 3GH/s by the end of the month.

rjk

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1ngldh

I just put up $150 or so for a 240V conversion on 3 rigs. Although it was a bit of a dumb purchase because I went to the brick and mortar store one night and started picking parts of the shelf. I could have spent half that by buying online. Oh well, I always forget something when I order online, easier to browse the shelves. Grin

film2240

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Quote from: DeathAndTaxes on February 03, 2012, 05:09:58 PM

"I'm not a serious miner,I just do it for the money"

This just struck me as funny. I think the serious miner's do it for the money too.

Not sure what the cutoff is for serious miner. Is it in GH/s or is it in what you have done?

Like:
You might be a serious miner if you watercooled 4 x5970 so you could keep one rig in the office during the winter.
You might be a serious miner if you installed a 30AMP 240V circuit to a NEMA L6-30R outlet to power your rigs.
You might be a serious miner if that made sense.

And for P4Man....
You might be a serious miner if you are planning to submerge your rigs in oil so you can dump the waste heat into your private cooling pond.

What I meant DeathandTaxes by that comment is the fact that I don't have the time/means to invest in multiple GPU systems (and multiple computers with several GPUs each) so I figured out,that anything that lets me add to 1 system like more FPGAs would be a good thing (keeps clutter to a minimum and it's much easier to maintain 1 PC than multiple PCs).

There are 2 options I'm considering for my system:
1.Keep HD6950 and add 2 mid range GPUs (cost effective option) as my mobo has max of 3 PCI-E slots and don't have time/means for a PCI-E extender as I like to keep everything self contained.(This requires a PSU upgrade if this option is followed)
2.Keep HD6950 gpu and add a low range FPGA (as that would beat my old gpu HD4670 by at least 2x.The GPU would be cashed in to part fund FPGA) to keep heat and energy use under control (spares me having to upgrade my PSU)

I'm not sure which of these 2 options would be cost effective in my situation for mining kit.So I want advice on this if possible,thanks.

dmcurser

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Hmm i guess I'm one of those miners lol got 4 systems running off 240 in the basement

siggy

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Quote from: DeathAndTaxes on February 03, 2012, 05:09:58 PM

You might be a serious miner if you installed a 30AMP 240V circuit to a NEMA L6-30R outlet to power your rigs.
You might be a serious miner if that made sense.

ouch.. I just got done putting in a 60 amp sub-panel in the ~~utility room~~ data center ... does that count?

double ouch is that actually made sense Cry

Siggy

DeathAndTaxes

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Gerald Davis

"I'm not a serious miner,I just do it for the money"

This just struck me as funny. I think the serious miner's do it for the money too.

Not sure what the cutoff is for serious miner. Is it in GH/s or is it in what you have done?

Like:
You might be a serious miner if you watercooled 4 x5970 so you could keep one rig in the office during the winter.
You might be a serious miner if you installed a 30AMP 240V circuit to a NEMA L6-30R outlet to power your rigs.
You might be a serious miner if that made sense.

And for P4Man....
You might be a serious miner if you are planning to submerge your rigs in oil so you can dump the waste heat into your private cooling pond.

film2240

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Quote from: DeathAndTaxes on February 03, 2012, 12:17:03 PM

Quote from: _Vince_ on February 03, 2012, 12:06:31 PM

And how much will it cost?

Double the price of 7970? Ouch!

The list price is $849.

I'd hate to imagine what the price would be in GBP.HD7970 already cost around ~£440 in UK.I'd think these are like ~£800 for HD7990 in UK.Maybe this will push some people to FPGAs if these prices keep up for GPUS.I'm already considering a small FPGA (The one I saw gave 3x performance of my HD4670 which will be cashed in for that purpose) to complement my HD6950 as the prices are simply unaffordable for bitcoin mining hobbyists like myself (I'm not a serious miner,I just do it for the money. A project idea for me is the 'ultimate silent miner' where it's nothing but 3 FPGAS connected with a giant passive heatsink,which would use my case as a heatsink with 1 silent 120mm fan to keep things cool/cheap/energy efficient)

DeathAndTaxes

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Gerald Davis

Quote from: SlaveInDebt on February 03, 2012, 04:42:39 PM

DAT don't try and hide your true feelings towards the 7990 you know it will do 1.2gh/s slightly oc'ed at near the same watts as 5970 aggressively oc'ed to 800mh/s. Why do you think we see youchdog dumping 5970's Wink

Your right. The 5970 sucks. Everyone should them as quickly as possible before they become worthless.

Being a generous guy I will extend an open offer for $300 ea if in good condition. I am collecting them because I think they might be wanted by museums in the near future.

SlaveInDebt

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Your Minion

DAT don't try and hide your true feelings towards the 7990 you know it will do 1.2gh/s slightly oc'ed at near the same watts as 5970 aggressively oc'ed to 800mh/s. Why do you think we see youchdog dumping 5970's Wink

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