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Author Topic: 5850 Not Up To Speed  (Read 2314 times)
watwugy
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May 08, 2011, 11:04:43 PM
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My 5850 is only generating about 220 mhash/s. I've seen many getting around 300/s. Does anyone know what could be causing this? I have no graphically intense processes running, and my drivers are all up to date, so why isn't my card performing like it should?
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Sonata
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May 08, 2011, 11:21:05 PM
 #2

OS?
Miner?
Drivers?
ATi Stream Version?
5850 Model Numbers?
Convery
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May 08, 2011, 11:27:00 PM
 #3

I get 400Mhash/s using;
OS: Windows XP x86
Miner: Phoenix 0.3 or 0.4
CCC: 10.12
Sapphire 5850 Toxic 1Gb

Clocks;
core: 1050
memory: 1200 effective (300)
volt: 1.25

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May 09, 2011, 12:08:43 AM
 #4

Convery, how did you manage to be able to adjust the voltage?
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May 09, 2011, 12:10:23 AM
 #5

Convery, how did you manage to be able to adjust the voltage?
some cards, namely reference ones, can adjust voltage. :p

It is pitch black. You are likely to be eaten by a grue.

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Camron
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May 09, 2011, 08:06:14 AM
 #6

I have same issue.  I have a Sapphire 5850 Xtreme:

OS: Windows 7
Miner: POCLBM GUI (any flags will cause the miner to crash)
Drivers: Latest
ATI Stream: 10.4
5850 Model number: Sapphire 5850 Xtreme Edition 1GB

Mine rate: 220 Mh/s @ stock clock, 240 Mh/s @ 775 Mhz, 262 Mh/s @ 850 Mhz

My card is not stable at 900Mhz so I have not tried it yet, I will probably need to adjust the voltage. 
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May 09, 2011, 08:11:07 AM
 #7

Weird.  I get 270MH/s with the same card (Sapphire 5850 Xtreme) at stock speeds.

Not familiar with stream 10.4... do you mean the CCC version?  I use 10.11.
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May 09, 2011, 08:41:24 AM
 #8

I get ~320MH/s @ 850/1000 with the same card at stock voltage.

I use latest drivers and poclbm gui with flags -v -w128 -f0.

You can adjust the voltage of this card with the latest Sapphire Trixx.
Melvin132
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May 09, 2011, 09:36:28 AM
 #9

I bought 3 Sapphire 5850 Xtreme last week, and 2 of them i can get about 330Mh/s at 880/340 at stock volt stable, if i push the voltage to 1.25 i can get them to about 980 core and about ~400 Mh/s
The other one is stable at 930/340 at stock volt (1.088) giving about 360 Mh/s and is able to give me almost 415 Mh/s when overvolted.
The problem is that if i set the vcore to 1.25 it generates way too much heat and also the (electric) cost of running them supersedes the gain.
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May 09, 2011, 01:02:04 PM
 #10

I'm looking for a stock 5850 reference cooler. Anyone have a dead reference 5850 card with a working fan/cooler that would be willing to sell me? I'm in USA. I can give up to 15 BTC depending on how fast I can get it.

Ubuntu Desktop x64 -  HD5850 Reference - 400Mh/s w/ cgminer  @ 975C/325M/1.175V - 11.6/2.1 SDK
Donate if you find this helpful: 1NimouHg2acbXNfMt5waJ7ohKs2TtYHePy
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May 10, 2011, 01:19:26 AM
 #11

Convery, how did you manage to be able to adjust the voltage?

Well, Sapphires forums and reviews said that you couldn't increase the voltage but I just opened Trixx (Sapphires overclocking tool) and adjusted it. Only bad part is that my 7 year old PSU exploded =P

But with my new PSU the maximum stable (and what I use) is 402Mhash, you can go up to 430Mhash but then you bluescreen after a few hours and my computer is being a bitch when it comes to rebooting.. Also the card never goes above 65C and is placed without a chassis right next to my bed so needless to say it's quiet enough :3

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