What does your card do for Mhash?

[[XC] gomeler]

OS: Ubuntu 10.04 x64
Card: Sapphire HD5830 Extreme
Core Clock: 1000MHz
Mem Clock: 300MHz
Miner: Phoenix 1.48
Tags used: VECTORS AGGRESSION=11 WORKSIZE=128 BFI_INT FASTLOOP=false
Mhash as reported by miner: 306
Driver Version: 10.12
APP Version: 2.1

OS: Ubuntu 10.04 x64
Card: Reference HD5850
Core Clock: 775MHz(I think? Whatever max in Linux CCC)
Mem Clock: 900MHz
Miner: Phoenix 1.48
Tags used: VECTORS AGGRESSION=11 WORKSIZE=128 BFI_INT FASTLOOP=false
Mhash as reported by miner: 310
Driver Version: 10.12
APP Version: 2.1

Will update with HD5850 at 1000MHz when I BIOS flash. Added mem clock. Might add power consumption estimates tonight.

Update.

OS: Ubuntu 10.04 x64
Card: Sapphire HD5830 Extreme
Core Clock: 900MHz
Mem Clock: 300MHz
Miner: Phoenix 1.48
Tags used: VECTORS AGGRESSION=11 WORKSIZE=256 BFI_INT FASTLOOP=false
Mhash as reported by miner: 280
Driver Version: 10.12
APP Version: 2.1

I have 8 cards in two machines with a 32nm quad, 2 GB of ram and an SSD. With the monitor off and the keyboard/mouse unplugged the entire assembly including the 1gbit switch pulls 1485 watts. These HD 5830s aren't the most efficient cards but at $110/pop I still stand by them. I am typically around 2.2 to 2.3 GH/s from these two boxes.

[p2501]

Hmh, so you're around 1,55mh/w.

That's very close to my efficiency, while you propably have spend less on your setup. So in the end a miner based on 6990 only makes sense when you're space constrained... which I 'luckily' am otherwise I would smack me now for choosing my setup lol...

[Reflex1]

Hmh, so you're around 1,55mh/w.

That's very close to my efficiency, while you propably have spend less on your setup. So in the end a miner based on 6990 only makes sense when you're space constrained... which I 'luckily' am otherwise I would smack me now for choosing my setup lol...

Im planning on investing in a 6990 ..would u say its the best option in terms of efficiency/space etc? I heard they get very hot and very loud

Or would buying 2x 6970's be a better option?

[danielkza]

Just a note, I think by 'tags' you meant 'flags'.

[p2501]

Im planning on investing in a 6990 ..would u say its the best option in terms of efficiency/space etc? I heard they get very hot and very loud

Or would buying 2x 6970's be a better option?

About efficiency, well gomelers setup is doing 1.55mh/w while mine puts out 1.58. It's not that much more and it is propably related to the fact that power wise I'm not very well setup. One card in my main rig with an Antec HCP-1200, three cards in the miner powered by two ax1200. So that's the loss of three PSUs for just four cards. I will change over to a setup with two cards in two miners, cutting down one PSU. IF I have WiFi in my basement, I didn't check yet. Other way would be to buy an Enermax MaxRevo 1500 for the miner (efficient and well build following Jonny's review of the 1350w unit).

So to answer your question: 6990 miners only makes sense when you're tight on space. If you are your main concern is finding the best PSU setup. Oh, and yes, they're loud. I have mine set at 100% fan:

sudo aticonfig --odgt --adapter=all
[sudo] password for p2501:

Adapter 0 - AMD Radeon HD 6990
Sensor 0: Temperature - 93.50 C

Adapter 1 - AMD Radeon HD 6990
Sensor 0: Temperature - 90.50 C

Adapter 2 - AMD Radeon HD 6990
Sensor 0: Temperature - 93.00 C

Adapter 3 - AMD Radeon HD 6990
Sensor 0: Temperature - 85.00 C

Adapter 4 - AMD Radeon HD 6990
Sensor 0: Temperature - 90.50 C

Adapter 5 - AMD Radeon HD 6990
Sensor 0: Temperature - 89.50 C

[Reflex1]

About efficiency, well gomelers setup is doing 1.55mh/w while mine puts out 1.58. It's not that much more and it is propably related to the fact that power wise I'm not very well setup. One card in my main rig with an Antec HCP-1200, three cards in the miner powered by two ax1200. So that's the loss of three PSUs for just four cards. I will change over to a setup with two cards in two miners, cutting down one PSU. IF I have WiFi in my basement, I didn't check yet. Other way would be to buy an Enermax MaxRevo 1500 for the miner (efficient and well build following Jonny's review of the 1350w unit).

So to answer your question: 6990 miners only makes sense when you're tight on space. If you are your main concern is finding the best PSU setup. Oh, and yes, they're loud. I have mine set at 100% fan:

I also use a ax1200. and i am tight on space in my case, im trying to decide between 2x 6990 or 3x 6970. But noise and heat are also important to me since they are going into my main rig. I guess in terms of efficiency the 6990s are the way to go

[p2501]

I also use a ax1200. and i am tight on space in my case, im trying to decide between 2x 6990 or 3x 6970. But noise and heat are also important to me since they are going into my main rig. I guess in terms of efficiency the 6990s are the way to go

If it's your main rig then I'd go with 2 6990's. Then put them under water and push them to 1000 core. =)

[ggdh]

I have 8 cards in two machines with a 32nm quad, 2 GB of ram and an SSD. With the monitor off and the keyboard/mouse unplugged the entire assembly including the 1gbit switch pulls 1485 watts. These HD 5830s aren't the most efficient cards but at $110/pop I still stand by them. I am typically around 2.2 to 2.3 GH/s from these two boxes.

Which motherboards? I was looking for one and it is not easy to keep budget low. Now i regret selling my MSI 790fx-gd70 and thinking about buying it back Cheapest Semptron cpu and i am set.

If I would throw there 4x 5830 which PSU I would need?
For now I have:
+ BQ680W for my 5870 rig - soon 2x 5870 if BTC will not burst
+ CM Ultimate 700W for 2x 5830 machine (I can easily add another 5830 and it should handle it with ease)

[[XC] gomeler]

I'm running on two ASUS X58 RIIIE right now Once I have the cards paid off I'm "upgrading" to a pair of 890FX-GD70s with PCIe extenders. I'll then put 6 cards on each board and power them off the two Antec 1200 TPQs that I'm currently using.

edit: Each quad-card rig pulls ~750w from the wall. I think with a 1GHz core clock I might be looking at about 850w for 4 cards. I'll find that out when my PCIe extenders arrive and I can space the cards out a bit.

[p2501]

My second 990fxa board arrived yesterday, to build a second miner. No new cards for now so it's still the same four 6990s which all are confirmed stable at 900 core. Both boards have: one ax1200, 1 athlon x2 245e, 2 gb cheapo memory, two cards each.

Now with the board which I already had the cards still are going strong at 900/1000 but on the second board it's a no go. Here they are running at 880/1250 (oc BIOS 'stock')... what's going on? Same setup but different results?!

[OldChap]

Does it help if you drop the mem clocks?

[p2501]

On 6990 it seems I just can go 100MHz below core. Will try now... *keeping fingers crossed*

Edit: Nope, there it went down again. Always seems to be the same core of one card that drags everything down.

[[XC] gomeler]

Can you just set that one core at a different clock? I personally just flash my cards to known stable clocks and never deal with this

[p2501]

Can you just set that one core at a different clock? I personally just flash my cards to known stable clocks and never deal with this

Yup, I left the one in question at 880 and set the other three to 900. Worked like a charm, at least over night.. =)