Topic: AMD 7790(GCN 1.1) (Read 15141 times)

Just wanted to throw an update out there, had a moment to test a 7790 on a machine.
Configuration: win7 64, 7790 specific drivers on amd's website, cgminer 3.0.1
-k diablo -I 11 -v 1 -w 64

Surprisingly, during mining, powerplay is keeping the memclock @ 150mhz(2d clock)
Its keeping the gpu at its appropriate 1050mhz(3d clock)

in cgminer I put core on 1150mhz(mem still stayed at 150mhz) and hashing @ 300mh/s(not to bad!)

By far the easiest card configuration Ive ever done to get appropriate clocks =P

UPDATE: its wattage at this clock is only 90watts! holy cow, thats greater than 3mh/s/W ! thats really nice

No problem. The 7790 is a bit finicky for litecoin.

WAIT A MINUTE!

I just reached 240 khash! EPIC WIN!

I reset my thread concurrency (I've been messing around with it and forgot to set it to 8000)

When I just checked my computer, 240 KHASH! EPIC WIN!

I'd give you guys some crypto, but even at 240, I'm still waiting for my first litecoin

I cannot thank you enough!

-DM

Already tried that.
Same results - Khash reduced by 3

Thanks for the help!
-DM

Edit* Currently trying that on my main card, but the last time it was reduced. We'll see

change core to 830 and i to 17

Thanks for the advice, I've already tried that.

Here's my current spec's - give me any advice you'd suggest.

GUIMINER_SCRYPT

Thread concurrency - 8000
Worksize - 128
Vectors - 1
Intensity - 18
GPU threads - 1

GPU core clock via overclocking software (800 MHz)
Memclock - 1500 MHz
Fan speed (Custom)
Core temperature  - 60 degrees Celsius.

What am I doing wrong?

Try this

gpu-engine 800
gpu-memclock 1500
thread-concurrency 8000

gives 240+ khash/s

What are your settings to get above 230 Khash on the 7790 for litecoin mining? I cannot seem to get mine high enough.

Thanks,
-DM

just got 7790 from powercolor a week ago, the hash rate I have with -v -w 128 -f 60 is ~260M, this card has the core freq of 1075MHz, while with -w 128 -f 60, it's showing ~244Mh/s, with -v -w 256 -f 60 I got exactly ~260Mh/s, this card is really quiet so I put it in my desktop and can barely notice the noise even I'm surfing while mining.

297 MHhash/s In GUI Miner with flags set to “-v -w 128 -f 1”

GPU Clock: 1200 MHz
Memory clock: 750 MHz (not sure if this changes anything, as the card seems to down clock memory to 150 MHz all by itself anyway)

Hey, what was ur BTC mining speeds?

I just got my first 7790 up and running ltc, and while I was a little disappointed with the results initially (246 Khash), the card is really freaking quiet and draws very little power. I can run the card at power -20% and still get the same results, so I'm guessing I'm probably only consuming 65-70 watts tops. Also I have the card in a case with fan speed at 40% and the temp hovers at 53c. I decided to triple down and order two more. I plan to have a very low power rig that is going to bring in around 730 Khash, but only draw around 300 watts or so for the whole system. As an added bonus, it will be super quiet and won't heat up my house during the summer.

I figure that as more gpus turn to ltc mining, the only sustainable way to profit will be to have the highest hash/watt. I bet that the newer cards coming out  (gcn1.1) are going to make older power, hungry cards useless. These cards cost me 125 each off newegg with the mail in rebates, and I have three games to sell. I was really tempted by the 7850 for close to the same price, but the heat, noise, and power waste would have been unacceptable for a home desktop miner/gaming rig.

Also thought I'd add that the card automatically down-clocks when mining btc if I add -v flag. I was having a heck of a time figuring that out. I also get the highest Khash using the settings in the ltc hardware comparison wiki (830/1500).

how about power consumption at 295Mhash

http://dustcoin.com/mining


if you are using a PPS pool, you can put in your hash rate in that site and it'll tell you CURRENT DIFFICULTY AND EXCHANGE RATE income per hour/day/week/month

300mhash card should give you about $2.50 a day right now mining BTC.

see if you can find an app that monitors voltage, possible the software is dropping voltage to protect the card.

I am going to get 3 of these (ordered 4 but... 1 is missing on stock) tomorrow... same sapphire.

I got 222kh/s using guiminer-reaper with the default 7770 settings.  I don't know enough about litecoin mining to optimize further.  Oddly, when overclocking, even if I raised mem and core speed, kh/s seemed to go down instead of up.  I'm not sure why.

Can you test with these switches? Up the worksize to 256...

-v 1 -w 256


I'm just curious if that helps at all.

Also, try 0-4 affinity checked in. AMD+AMD with 1/2 core affinity has helped me cover spikes, maybe the Bonaire chip will benefit? It's a longshot to get a few more hashes, but again, just for shits and giggles.

Keep us updated. I'm looking at building 2 rigs with 6 of these cards for Litecoin mining... Very interested if they can get a solid 300 khash on LTC.

Even with the beta 3.0.0 MSI Afterburner it doesn't show nor allow change of voltage directly.  Can adjust via the power limit though.

I did try exceeding the normal clock speed limit.  At 1300Mhz, I was getting 312MH/sec, but seeing a few artifacts so I immediately stopped.

1250Mhz core seems stable without artifacts though, and I'm getting a solid 295MH/sec