x2 sapphire xtreme 5850
stock voltage 850 clock, 328mhash
phoenix 1.46 phatk
temp 75and 77,fan auto
Topic: Sapphire HD 5850 Xtreme Overclock Discussion (Post your stable overclocks) - page 2. (Read 14970 times)
May 23, 2011, 03:18:36 AM
May 23, 2011, 03:10:56 AM
Just a note, I've seen reports of highest megahashes per second from people using the latest stream SDK (2.4 I believe) + the latest PhatK kernel for phoenix.
Also lowering your memory to 300 MHz and then playing with bumping it up random amounts to find the sweet spot works well too, and cuts heat output (compared to 1000 MHz memory)
Also lowering your memory to 300 MHz and then playing with bumping it up random amounts to find the sweet spot works well too, and cuts heat output (compared to 1000 MHz memory)
If I touch the mem on my 5830's they lock up.
5830@300MH/s, 1000/300 @1.163v(stock), appears stable
May 23, 2011, 02:18:06 AM
Running one HD5850 on XP.
75c, Clock = 890MHz, MemClock = 995MHz, running at 330Mhash/s. Stable (4 days uptime)
75c, Clock = 890MHz, MemClock = 995MHz, running at 330Mhash/s. Stable (4 days uptime)
May 23, 2011, 01:59:23 AM
Just a note, I've seen reports of highest megahashes per second from people using the latest stream SDK (2.4 I believe) + the latest PhatK kernel for phoenix.
Also lowering your memory to 300 MHz and then playing with bumping it up random amounts to find the sweet spot works well too, and cuts heat output (compared to 1000 MHz memory)
Also lowering your memory to 300 MHz and then playing with bumping it up random amounts to find the sweet spot works well too, and cuts heat output (compared to 1000 MHz memory)
If I touch the mem on my 5830's they lock up.
May 22, 2011, 10:29:55 PM
Just a note, I've seen reports of highest megahashes per second from people using the latest stream SDK (2.4 I believe) + the latest PhatK kernel for phoenix.
Also lowering your memory to 300 MHz and then playing with bumping it up random amounts to find the sweet spot works well too, and cuts heat output (compared to 1000 MHz memory)
Also lowering your memory to 300 MHz and then playing with bumping it up random amounts to find the sweet spot works well too, and cuts heat output (compared to 1000 MHz memory)
May 22, 2011, 10:10:30 PM
Im getting my 5850 this friday. Is it really necessay to change the voltage to do overclock or you can do something with the stock voltages?
Stock the highest I've gone is 860Mhz, and the display driver crashed after a few hours. No problems so far at 830Mhz stock voltage. Might try tweaking the voltage later.
I get about 310M/hashes at 830Mhz.
May 22, 2011, 09:54:30 PM
403 MH/s
1025 core
225 memory
1.175 v
phoenix with phatk kernel. WORKSIZE=128 VECTORS BFI_INT
runs at 75 C
1025 core
225 memory
1.175 v
phoenix with phatk kernel. WORKSIZE=128 VECTORS BFI_INT
runs at 75 C
May 22, 2011, 09:50:32 PM
Im getting my 5850 this friday. Is it really necessay to change the voltage to do overclock or you can do something with the stock voltages?
You can do some overclocking with stock voltage, I made it to 325 mhash/s on one of my cards using stock voltage. You can use catalyst control center for that, or download Trixx. Trixx will also let you adjust your voltage up if you want to do that in the future.
May 22, 2011, 09:43:59 PM
Im getting my 5850 this friday. Is it really necessay to change the voltage to do overclock or you can do something with the stock voltages?
May 22, 2011, 09:41:26 PM
Im using a Sapphire 5850 Xtreme, overclocked using Trixx
1000mhz core, 800mhz memory @ 1.3v
Windows Vista x64
GUI Miner 5-21-11 version -v -w128 -f 25
Watercooled, full load @ 43C
374.6 Mhash/s
Im still tweaking the memory settings and just arbitrarily put 1.3v there to ensure stability at 1000mhz core. 1.250v failed after a few hours, and I didnt want to play with finding exactly the right spot. Its on the to-do list.
1000mhz core, 800mhz memory @ 1.3v
Windows Vista x64
GUI Miner 5-21-11 version -v -w128 -f 25
Watercooled, full load @ 43C
374.6 Mhash/s
Im still tweaking the memory settings and just arbitrarily put 1.3v there to ensure stability at 1000mhz core. 1.250v failed after a few hours, and I didnt want to play with finding exactly the right spot. Its on the to-do list.
May 20, 2011, 04:18:43 PM
My clocks are at 780/300 at Stock (1.088v), I get around 310MHs with Phoenix with phatk, I know I can run higher but I'm waiting on my new PSU as mine is lacking enough wattage for higher overclocking. Once I get the new PSU I'm planning on upping the voltage to 1.15 and 850+ clockspeed.
May 20, 2011, 03:32:21 PM
Multiple Reference 5850's
Ubuntu 10.10
No Crossfire
ATI 5870 BIOS
900 Core/300 Mem @ 1.08 V
65-70C @ 65% Fan, Open Air and extra slot between cards
Phoenix Miner - VECTORS AGGRESSION=12 BFI_INT (no WORKSIZE)
360 Mh/s
Ubuntu 10.10
No Crossfire
ATI 5870 BIOS
900 Core/300 Mem @ 1.08 V
65-70C @ 65% Fan, Open Air and extra slot between cards
Phoenix Miner - VECTORS AGGRESSION=12 BFI_INT (no WORKSIZE)
360 Mh/s
May 20, 2011, 03:26:44 PM
Single Sapphire Xtreme
985/300 @ 1.2V
74-75C @ 75% fan
Guiminer with flags -v -f1
To be honest after 1.2V wattage cost grows faster than income from hashing ( checked with watt-a-kill thing)
PS
at 990/300 @ 1.2V miner crashes after about 2h
985/300 @ 1.2V
74-75C @ 75% fan
Guiminer with flags -v -f1
To be honest after 1.2V wattage cost grows faster than income from hashing ( checked with watt-a-kill thing)
PS
at 990/300 @ 1.2V miner crashes after about 2h
May 20, 2011, 02:22:58 PM
There's been a lot of discussion for the Sapphire HD 5850 Xtreme all over the place, making it hard to find important information.
Let's have it all condensed into one thread. I'll start first by posting my current settings:
I use Sapphire Trixx to change voltage and MSI Afterburner to change clock and fan speed.
HD5850 Xtreme CrossfireX
ULPS Disabled
Voltage 1.150V
Core: 945
Memory: 300
Catalyst 11.5 / SDK 2.4
357MH/s
I tried 1000MHz @ 1.200V but it got kinda hot so I dropped it down to 1.15V and worked from there. At 1.15V, 950 core, I had a few instances where the miner just stopped mining (no errors or anything) and GPU load dropped down to 0%. So now I'm running it at 945 core and seeing where it takes me.
Post your settings!
Let's have it all condensed into one thread. I'll start first by posting my current settings:
I use Sapphire Trixx to change voltage and MSI Afterburner to change clock and fan speed.
HD5850 Xtreme CrossfireX
ULPS Disabled
Voltage 1.150V
Core: 945
Memory: 300
Catalyst 11.5 / SDK 2.4
357MH/s
I tried 1000MHz @ 1.200V but it got kinda hot so I dropped it down to 1.15V and worked from there. At 1.15V, 950 core, I had a few instances where the miner just stopped mining (no errors or anything) and GPU load dropped down to 0%. So now I'm running it at 945 core and seeing where it takes me.
Post your settings!
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