Topic: PSA: Malta 7990s are NOT suitable for mining! - page 2. (Read 21055 times)

WRONG.  mining is quite doable on the dual slot reference cards.  See next quote remarks.



WRONG. ...the M  7990s seems best at scrypt mining and for bitcoin mining they still perform well at 1150-1250mh/s   I believe they can even be pushed to 1300+mh/s  All at ~375 Watts



WRONG.  this quote is where dogie is assuming stuff again, it was a good assumption, however 375w is more than enough to power both cores on the new Malta 7990.  AMD has had about 1 year to redesign power consumption of the new 7990.

 
Dogie did say it costs $2000, at the time I didn't notice how bad he was trolling so I did not capture the quote.   it seems he had gone back and edited his post because everyone was thinking he was a moron.

So good job dogie, you were really right about nothing.  Next time get both pieces of the hardware, then do a unbiased test of both pieces of hardware in the same environment.   Spouting numbers and assumptions in every 7990 thread solely based on your self-qualified "masters of engineering" experience and not having the hardware has made you look like a jackass.  Sup Troll!?!?!?!

He said, she said... I hate taking sides but just post the quote where dogie said 1 card cost $2k. I looked at the first page of this thread and did not see that.

dogie probably overreacted. What does "suitable" mean anyway? It's all relative to the buyer. It's not a Nvidia vs AMD mining comparison. It's more of a power-draw vs price vs hashrate suitability discussion.

Edit: changed 1k to 2k typo

WHY WOULD I SAY ONE CARD COSTS $2000, are you kidding me. I was always comparing dual cards. I'd ask you to quote me but I know you'll just come up with some excuse again and then lock the thread again.... OH WAIT ITS MY THREAD.

 

Nope.  You said 1 card costs $2000, and 1 card will use over 500 watts to get the same hash power or it will hash a lot less.  The new malta uses less space and performs more efficiently for the power. The malta still hashes 1150 MH/s - 1250 mh/s easily.  Now you might be right about the temperature, however everything else you were wrong on.   Finally, I am selling each card for a significant profit, certainly not because of financial loss.     Congrats at making such a big deal out of what you really don't know or have.

Continuing greaterninja's thread because he cried and locked it: https://109.201.133.65/index.php?topic=200628
He left a lot of misnomers which should not be continued by the community.

1) No I didnt, I said it will be power limited. If you're maxing out at STOCK CLOCKS and slightly undervolted, on bitcoins, have fun scypting.
2) Same performance? Nope, my cards are 1300+, yours are 1150.
3) 2/3 the space? Great, now try and use the card.

For two cards *facepalm*


Many more fans? I am using TWO of these cards, TWO. So yes, I do have 2 more fans than you because im generating another 400W+ of heat in the same space.

tldr: I warned you, you spent $3.3k on 3 cards and are now trying to sell them because you realized I was right. Enjoy your financial loss because you were so arrogant.

with a dual gpu 7990 club 3d if you have enough cooling you should get around 1.2Ghz....of course with a lot of noise due to the fans that it brings.

I am getting 2 x gigabyte 7990s tomorrow, I'll test one out and let u guys know.   So far the 7790, 7870 xt and 7950 cards seem to be the best cards for the $.

So anyone have one of these new 7990s yet? Kinda interested in some mining results.

Sadly the price seems really steep, quite a bit more than the older, beefier 7990s with triple PCI-e power connectors and triple slot coolers. Not going to be worth it if they're mediocre mining cards.

A 7990 is 2 7990s

It was improved in a lot of titles but far from all, and it's still a lot worse than SLI. Crossfire is for all intent and purposes still quite useless (why bother when 2 gtx660 TI gives a better experience than 2x7970s). Best case atm you are looking at 50% "perceived" higher FPS with crossfire vs one card while the benched FPS scaling is in the 90%+ range. AMD have at least acknowledged the problem for some time and in some popular titles they have almost eliminated the problem as long as you use vsync or cap your fps.

The pre-beta drivers simply put the 7990 on the same level as 2 7970s in crossfire, they didn't solve the micro stutter problem completely, yet. AMD spent to long trying to get crossfire scaling as high as possible while Nvidia seems to have focused more on actually making SLI usable, it wasn't until a few large tech sites started bashing AMD for the poor experience with crossfire last year that they started looking at it.

^_^ Thank you, finally someone with some sense!

Somebody is wrong on the Internet.

For electronics, TDP is the same as power draw, to the point that it is sometimes easier to measure the change in temperature than the actual power draw. When you overclock or over-volt a chip, you change the TDP (hopefully not in a way you can't compensate for: such as using a lower ambient temperature).

Molex connectors next to PCIe slots are not part of the slot. Those connectors are likely there becuase the slot connector can not supply more than 75W safely, as stated by the spec quoted by dogie. But what do I know? I wash dishes for a living.

PS: RE: your claim 375Watt TDP equals ~500Watts of power draw. I have 2 possible theories of where you got your information:
1. Online Power supply calculators grossly overestimate the required power. They either want to sell you a large PSU, or assume the PSU you purchase will be sub-standard.
2. Volt-Amps (at the wall) is NOT the same as Watts. For non Power-factor Corrected power supplies, you "waste" about 1/3 of the current (assuming power factor of .67, if my math is right). This wasted current causes resitive heating in the wiring, but otherwise does not draw any power. This happens when the current peaks do not line up with the voltage peaks in the power cycle. It means you get current flow at the zero voltage crossing. (Power=(current)(voltage), by example  (5A)(0V)=0W)

Which made ~5% difference according to the reviews.


It was fixed with the prototype drivers, which may have been 13.5 pre beta.

Apparently they are terrible for gaming because of some random screen hitching which is visible but not detectable by FRAPs, hasnt been fixed with latest drivers, so until thats fixed the resale value for these is borked, useless for gaming, and I cant see why you would buy one for mining as 7950s still offer MUCH better value.

Not exactly. The new Maltas have the lowest consuming cores available, AMD is doing some serious binning with them.

I think its probably the distributer charging a pretty penny for the first batch, where demand is guaranteed to outstrip demand.

$50 above MSRP? Way to go Newegg...

http://www.newegg.com/Product/Product.aspx?Item=N82E16814202036

-_- the cores are identical?