HD5870 best Mhash? | Bitcointalksearch.org

gopher

full member

Activity: 135

Merit: 100

Quote from: CYPER on July 05, 2011, 05:27:08 PM

Stock voltage, but I can't tell you the exact value as they are currently mining. I've flashed them with an edited BIOS, which does not allow changing the voltage. I've tried 990 core which was stable, but speeds weren't high enough to justify the extra power consumption or higher temperatures to be expected. For me 960Mhz core is the best setting.

Is 1.1250 the default voltage or you increased it?

I decreased it. I think the default voltage was 1.15. I will check next time

Bert

full member

Activity: 126

Merit: 100

I have two 5870's in an caseless motherboard overlocked at 1000/347 (1.2 volts) running at 77.5°C and 76°C both hashing at a stable 456.75Mhash/sec using phoenix-1.48 (patched with all the speed improvements released in the past few weeks) under Ubuntu 11.04.

CYPER

hero member

Activity: 812

Merit: 502

Quote from: gopher on July 05, 2011, 04:50:24 PM

Hi CYPHER,

Do you mind sharing the core voltage values in the above set-up?

I also have 4 x 5870 in my rigs, but I keep them at 920/1200/1.1250 - every time I push the GPU clock over 940, they become unstable and lock-up (the memory FRQ does not affect much, but it looks like higher the memory clock, the card is bit more stable)

Stock voltage, but I can't tell you the exact value as they are currently mining. I've flashed them with an edited BIOS, which does not allow changing the voltage. I've tried 990 core which was stable, but speeds weren't high enough to justify the extra power consumption or higher temperatures to be expected. For me 960Mhz core is the best setting.

Is 1.1250 the default voltage or you increased it?

czz

newbie

Activity: 48

Merit: 0

Sapphire 5870 gives me 449 MH/s at 1000 MHz core, 300 MHz RAM. Stock voltage (1.2V). I'm using 64-bit Linux with latest Catalyst and Stream SDK, and Phoenix 1.50 with that "+3%" patch.

My phoenix command line is:
./phoenix.py -u <...> -k phatk DEVICE=<...> VECTORS BFI_INT WORKSIZE=256 AGGRESSION=10 FASTLOOPS=false

Bad thing is that I have 3 cards of the same model but only two of them work @ 1 GHz core. The third one freezes after several minutes if I set more than 960 MHz.

christiankm

newbie

Activity: 2

Merit: 0

Mine will only reach 400 mhash at 970 core.. :/
How do you do it?

Besides. What linux setup are you using OP? Looks very neat.

gopher

full member

Activity: 135

Merit: 100

Hi CYPHER,

Do you mind sharing the core voltage values in the above set-up?

I also have 4 x 5870 in my rigs, but I keep them at 920/1200/1.1250 - every time I push the GPU clock over 940, they become unstable and lock-up (the memory FRQ does not affect much, but it looks like higher the memory clock, the card is bit more stable)

CYPER

hero member

Activity: 812

Merit: 502

I have 4x XFX 5870 clocked @ 960Mhz Core and 300Mhz Memory = 4x437Mhash/s = 1748Mhash/s absolutely stable speed.

willphase

hero member

Activity: 767

Merit: 500

http://forum.bitcoin.org/index.php?topic=6144.msg239451#msg239451

people are getting around 440. I get 430 but I don't overclock as much as some others.

Will

being

newbie

Activity: 38

Merit: 0

Hey.

I have a HD5870.
What's the highest Mhash/s you've gotten with your HD5870? At 24/7 stable clocks of course.

If you believe it's high, what clocks/volts/cooling are you using?

Topic: HD5870 best Mhash? (Read 1678 times)