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Author Topic: Hello and 5850 Variance?  (Read 864 times)
RedSky
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April 24, 2012, 11:35:10 PM
 #1

Hi, new to the forum and just found out about newburgatory. Love the concept of bitcoin and been mining for a couple weeks.

To my main point - what sort of variance do you guys see in HD 5850s? I ask because I'm only able to pull ~300MH/s and that's after exhaustive experimentation (different intensities, work loads, opencl vs phatk2, fastloop, vectors, vectors4, etc) with the settings (I'm using phoenix 2.0 miner btw).

Is that 300 MH/s within the expected performance variance of the 5850s? If not, what could be causing it to run slow?
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mufa23
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April 25, 2012, 12:07:05 AM
 #2

Please fill out the following form so I can make a mostly accurate answer:

-GPU Core Clock:
-Memory Clock:
-Voltage:
-Current MH/s:
-Mining Program and version:
-Miners' Kernal:
-Miners' Flags:
-Operating System:

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RedSky
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April 25, 2012, 02:58:09 AM
 #3

Thanks for the reply. Here's the info:

- GPU Core: 400 MHz
- Memory: 900 MHz
- Current MH/s: 300
- Mining Program: Pheonix 2.0
- Mining Kernal: phatk2
- worksize = 128, vectors4 = True, bfi_int = True, aggression = 13
- OS: Ubuntu 10.10

I haven't changed any clocks since I got the card - I've been waiting till I upgrade to Ubuntu 12.04 due to catalyst software concerns (dependencies are out of whack and I don't want to invest the time fixing it when I'll be installing a new OS in a couple of days). For a stock 5850 with these settings, does 300 MH/s make sense?
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April 25, 2012, 03:03:16 AM
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Thanks for the reply. Here's the info:

- GPU Core: 400 MHz
- Memory: 900 MHz
- Current MH/s: 300
- Mining Program: Pheonix 2.0
- Mining Kernal: phatk2
- worksize = 128, vectors4 = True, bfi_int = True, aggression = 13
- OS: Ubuntu 10.10

I haven't changed any clocks since I got the card - I've been waiting till I upgrade to Ubuntu 12.04 due to catalyst software concerns (dependencies are out of whack and I don't want to invest the time fixing it when I'll be installing a new OS in a couple of days). For a stock 5850 with these settings, does 300 MH/s make sense?

I use 860 GPU core and 300 MHz memory to get approx 360~ mhs.  Worksize I use 256, everything else is the same. You may try cgminer too, I'm in the process of migrating my cards over too.

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RedSky
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April 25, 2012, 03:33:18 AM
 #5

Sounds good. 360 MH/s is more in line with what I've been seeing elsewhere on the board. I'll just have to fiddle with the clocks as soon as I can upgrade to ubuntu 12.04 and get the new catalyst installed. Thank you.
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April 25, 2012, 03:36:54 AM
 #6

I've just gotten into mining recently also and I'm getting around 370-390 MH/s on my 5850s depending on the overclock.

-GPU Core Clock:900-950
-Memory Clock:150
-Voltage:1.088 (I have 1 asus thats 1.163 yuck)
-Current MH/s:372@900 382@925 392@950
-Mining Program and version:cgminer 2.3.3
-Miners' Kernel:phatk
-Miners' Flags:I-9, Worksize-256, Vectors-2, Threads-2
-Operating System:win-7x64(sdk2.5), Ubuntu 11.04(sdk2.4) same results

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John (John K.)
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April 25, 2012, 03:41:18 AM
 #7

I've just gotten into mining recently also and I'm getting around 370-390 MH/s on my 5850s depending on the overclock.

-GPU Core Clock:900-950
-Memory Clock:150
-Voltage:1.088 (I have 1 asus thats 1.163 yuck)
-Current MH/s:372@900 382@925 392@950
-Mining Program and version:cgminer 2.3.3
-Miners' Kernel:phatk
-Miners' Flags:I-9, Worksize-256, Vectors-2, Threads-2
-Operating System:win-7x64(sdk2.5), Ubuntu 11.04(sdk2.4) same results

This was what I did a couple months ago too. However the temps are far too high for my cards to bear, and I even RMA'ed one last month due to overheating.

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April 25, 2012, 04:03:08 AM
 #8

I'm not exactly sure how hot is too hot but my rigs are in the basement and I have the temps set at 73 and the fans run about 2500 rpms the one asus fan runs around 3500 I tried lowering the volts but it wouldn't run much past stock clocks with anything other than 1.163 and one xfx that I even took apart and put some artic silver on still runs the fan at ~3500 funny how some cards that are identical run hotter or overclock better.

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John (John K.)
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April 25, 2012, 04:45:40 AM
 #9

I'm not exactly sure how hot is too hot but my rigs are in the basement and I have the temps set at 73 and the fans run about 2500 rpms the one asus fan runs around 3500 I tried lowering the volts but it wouldn't run much past stock clocks with anything other than 1.163 and one xfx that I even took apart and put some artic silver on still runs the fan at ~3500 funny how some cards that are identical run hotter or overclock better.
I would say around 80~ is hot. I ran mine at 85 for a month last time, that killed it outright.

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mufa23
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April 25, 2012, 05:58:17 AM
 #10

Thanks for the reply. Here's the info:

- GPU Core: 400 MHz
- Memory: 900 MHz
- Current MH/s: 300
- Mining Program: Pheonix 2.0
- Mining Kernal: phatk2
- worksize = 128, vectors4 = True, bfi_int = True, aggression = 13
- OS: Ubuntu 10.10

I haven't changed any clocks since I got the card - I've been waiting till I upgrade to Ubuntu 12.04 due to catalyst software concerns (dependencies are out of whack and I don't want to invest the time fixing it when I'll be installing a new OS in a couple of days). For a stock 5850 with these settings, does 300 MH/s make sense?
Try dropping the Mem and raising the Core clocks. Maybe Mem down to 300Mhz, and starting the Core at 900Mhz. Then slowly start bumping the Core higher until it becomes unstable, then drop it back a bit. I'm guessing it will start giving problems after 970-980Mhz. You might be lucky and get it past 1000Mhz. But it's just a guess. I don't personally own a 5850's, but 5830's. I'm guessing they act mostly the same.

If you haven't seen this before, check it out: https://en.bitcoin.it/wiki/Mining_hardware_comparison#AMD_.28ATI.29
Scroll down to the 5850s, and see what other people tried. Just be careful when playing with the voltage, unless you know what you are doing.

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dphillippi
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April 16, 2013, 06:24:49 PM
 #11

With 2 x 5850 I'm getting 740MH/s.
Here's my settings:

-Intensity: 10
-gpu temp: 68
-GPU Core Clock:850
-Memory Clock:300

CGminer 2.11.4
Ubuntu 11.04(sdk2.Cool
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April 16, 2013, 06:36:12 PM
 #12

Using Trixx:

Sapphire 5850
GPU 902
Memory 182
1.0625V
78ish C° < I should probably try and lower this

360MH/s
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