Powercolor 7990

[oldDirty]

I think the 7990 will came with only two pcie Connectors. AMD alway goes the secure way.
The release dato is unknown anyway, so Powercolor launch this for computex.

So the 7990 will only have 2x8pins for < 375W, and this will be faster clocked but have 3x8pins for ~525W?

AMD keeps always lower frequenzies on the Dual GPU cards, so they pass the ATX Form without stress.
Just look at Asus Ares, launched with full 5870 specs.

[jjiimm_64]

I do not like the fact that it will need 3 of the precious PCI cables....

I do not like to use molex connectors.  much less having 4 sets of molex adapters on one rig if you want to run 4x7990

[rjk]

I do not like the fact that it will need 3 of the precious PCI cables....

I do not like to use molex connectors.  much less having 4 sets of molex adapters on one rig if you want to run 4x7990

LOL I doubt you will be mining with this one. It is likely to be extremely inefficient and way too expensive.
7990 should be alright though.

[crazyates]

I do not like the fact that it will need 3 of the precious PCI cables....

I do not like to use molex connectors.  much less having 4 sets of molex adapters on one rig if you want to run 4x7990

LOL I doubt you will be mining with this one. It is likely to be extremely inefficient and way too expensive.
7990 should be alright though.

Expensive? Hell ya! Inefficient? It's probably just as "inefficient" as 2 7970s, which is gonna be what, 1100MH/s @ 250W?

EDIT: I'm assuming undervolted, with stock core and downclocked ram.

[rjk]

I do not like the fact that it will need 3 of the precious PCI cables....

I do not like to use molex connectors.  much less having 4 sets of molex adapters on one rig if you want to run 4x7990

LOL I doubt you will be mining with this one. It is likely to be extremely inefficient and way too expensive.
7990 should be alright though.

Expensive? Hell ya! Inefficient? It's probably just as "inefficient" as 2 7970s, which is gonna be what, 1100MH/s @ 250W?

Yeah I suppose so, although if heat isn't managed well enough, efficiency could be affected. This 28nm stuff sucks down major power when it gets too hot.

[jjiimm_64]

Expensive? Hell ya! Inefficient? It's probably just as "inefficient" as 2 7970s, which is gonna be what, 1100MH/s @ 250W?

EDIT: I'm assuming undervolted, with stock core and downclocked ram.

7970 are NOT inefficient..

this rig pulls 830watts at the wall

Code:

cgminer version 2.3.6 - Started: [May 24, 2012, 9:46 pm]    Rig:miner19
(5s):2767.69  (avg): 2754.53 Mh/s  |    H: 83.8  Q:171983   A:351349   R:1624   HW:404   E:?%   U:38.01/m
TQ:?   ST:560   SS:?   DW:19557   NB:901   LW:812647   GF:107   RF:196
Connected to http://gpumax.com:8332 with LP as user ?
Value:
GPU 0:	74.0C	2290RPM 	39% 	113	| 554.5/551.0Mh/s | 	99% |	930Mhz 	800Mhz 	1.17V 	A:70935	R:252	HW:0	U:7.67/m 	I: 9
GPU 1:	64.0C	1035RPM 	0% 	64	| 553.2/551.1Mh/s | 	99% |	930Mhz 	800Mhz 	1.17V 	A:70099	R:253	HW:0	U:7.58/m 	I: 9
GPU 2:	73.0C	1072RPM 	1% 	74	| 553.1/551.0Mh/s | 	99% |	930Mhz 	800Mhz 	1.17V 	A:68123	R:632	HW:404	U:7.37/m 	I: 9
GPU 3:	65.0C	1049RPM 	0% 	65	| 553.4/550.5Mh/s | 	99% |	930Mhz 	800Mhz 	1.17V 	A:71125	R:238	HW:0	U:7.69/m 	I: 9
GPU 4:	73.0C	1170RPM 	30% 	103	| 553.6/551.0Mh/s | 	99% |	930Mhz 	800Mhz 	1.17V 	A:71067	R:249	HW:0	U:7.69/m 	I: 9

[JWU42]

404 HW errors?!?

Yikes 

Too bad you can't undervolt in linux 

[jjiimm_64]

after re-reading crazyates post, i think he was being sarcastic...  missed that.  i'm gettin old.


404 HW errors...  dont usually get them, but they happen on linux too.  this is out of 350k A shares, so no big deal. 

[ARapalo]

Can anyone just post a quick comparison of the hash rates of a 6990 vs 7990?

[MrTeal]

Can anyone just post a quick comparison of the hash rates of a 6990 vs 7990?

Since it hasn't been released and we don't know the clocks, no.

[Aseras]

Can anyone just post a quick comparison of the hash rates of a 6990 vs 7990?

If you assumed no over clock and full 7970 speeds it would get about 1100 mhash. There's very little chance of it overclocking near where a single 7970 can go, to 1200mhz or more. It's going to be a very toasty card.  If you could get to 1200/1200 it would get about 1400mhash.

A 6990 stock gets around 700 mhash. 800 with overclocking.

[eroxors]

Any word on final price of the 7970x2? This would be an important measure of the value to miners... i.e. if there is a price-break between this and 2 individual 7970s, it would mean a much better Hash/$ rate.

[multi#lord]

I don't think a price has been released yet for the 7970 X2. Considering its size and the amount of energy it will chug, I would think of buying one if a waterblock and more narrower rear IO bracket was released.

I am wondering if it is worth buying a dual Radeon 79xx card now or wait another 6 to 7 months for the second generation of GCN.

[Mousepotato]

Wasn't that ASUS 5870x2 like $900+?  I'd expect a 7970x2 to be somewhere in that area, if not higher.

Edit: Ouch, they were $1100 from NewEgg.

[crazyates]

I don't think a price has been released yet for the 7970 X2. Considering its size and the amount of energy it will chug, I would think of buying one if a waterblock and more narrower rear IO bracket was released.

I am wondering if it is worth buying a dual Radeon 79xx card now or wait another 6 to 7 months for the second generation of GCN.

The advantage this has over dual cards is cooling. To take up 4 PCIe slots in a MB, you can either have 2x double slot 7970s crammed together with bad cooling, or this triple wide with a slot below for airflow. Same MH/s, same space in the case, but better airflow.

[cmg5461]

...Same MH/s, same space in the case, but better airflow.

...Same MH/s, less space in the case, but better airflow.

[crazyates]

...Same MH/s, same space in the case, but better airflow.

...Same MH/s, less space in the case, but better airflow.

No, I said it right. I'm talking about keeping that 4th slot open for airflow. If you did take out the extra slot, it would be less space.

2 slots (7970) + 2 slots (7970) = 4 slots with bad cooling.
3 slots (7970x2) + 1 slot (for airflow) = 4 slots with better cooling.
3 slots (7970x2) + 0 slots (for airflow) = 3 slots with bad cooling.

[cmg5461]

...Same MH/s, same space in the case, but better airflow.

...Same MH/s, less space in the case, but better airflow.

No, I said it right. I'm talking about keeping that 4th slot open for airflow. If you did take out the extra slot, it would be less space.

2 slots (7970) + 2 slots (7970) = 4 slots with bad cooling.
3 slots (7970x2) + 1 slot (for airflow) = 4 slots with better cooling.
3 slots (7970x2) + 0 slots (for airflow) = 3 slots with bad cooling.

Oh, ok.  That's kind of what I was hinting at o.o

[multi#lord]

http://www.donanimhaber.com/ekran-karti/haberleri/PowerColorin-cift-grafik-islemcili-yeni-devi-Radeon-HD-7970-X2-Devil13-detaylandi.htm

[rjk]

17 phases !?!??!?!?!?!!