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Author Topic: How to best optimize my Sapphire HD 6870 for mining?  (Read 6419 times)
celcoid
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January 06, 2012, 11:50:23 PM
 #1

Ok right now I am using this card
http://www.newegg.com/Product/Product.aspx?Item=N82E16814102948

running at 950core, 300memory, and 1.175v with 75C @60% fan speed.

I am using the newest GUIminer with 11.12 drivers

flags "-v -w128"

I am getting 284-287 Mhash/s

How can I increase my Mhash/s

Thanks,
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sveetsnelda
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January 07, 2012, 09:01:38 AM
 #2

I have 4 of these cards.  I also run them at the same settings and voltage.  I get about 293Mhash/sec in Ubuntu with cgminer.  You're not really that far off.

14u2rp4AqFtN5jkwK944nn741FnfF714m7
jjiimm_64
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January 07, 2012, 07:45:37 PM
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I have a couple of these cards to...  290 is all your going to get stable

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sveetsnelda
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January 07, 2012, 08:01:19 PM
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Yeah...  You could hit the 300 mark if you're not as concerned with electricity costs, but that's about as far as you're going to go without creating some serious heat.  The "Toxic" edition cards run at 960 with 1.188 volts.  The PCB and cooler is exactly the same.  If you want me to send you the BIOS, just send me a PM.

14u2rp4AqFtN5jkwK944nn741FnfF714m7
Fiyasko
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Okey Dokey Lokey


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January 07, 2012, 08:05:55 PM
 #5

I've got my Dual 6870BE gaming rig running Two 1ghz core 600mem XFX6870's, They bring 314mh/s each with Miner drivers
With gaming drivers tho, I get 298mh/s


http://bitcoin-otc.com/viewratingdetail.php?nick=DingoRabiit&sign=ANY&type=RECV <-My Ratings
https://bitcointalk.org/index.php?topic=857670.0 GAWminers and associated things are not to be trusted, Especially the "mineral" exchange
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January 07, 2012, 08:09:26 PM
 #6

Except the voltage is high and the fans are probably screaming.  Wink

I ran my Gigabyte 6870s at 1000mhz for a bit.  They were pretty stable, but the voltage was cranked.

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January 07, 2012, 08:16:39 PM
 #7



remember, the tortoise wins, not the rabbit

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celcoid
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January 07, 2012, 08:46:53 PM
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Thanks for the suggestions guys, I have recently purchase three Sapphire Xstreme 5830's for $250 off someone, and Im in the works of buying two sapphire reference 5870's for $300. I will be posting pics eventualy
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January 07, 2012, 10:00:08 PM
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I've got one shappire 5830 xtreme running at 910core 1000mem grabbing me 306mh/s

http://bitcoin-otc.com/viewratingdetail.php?nick=DingoRabiit&sign=ANY&type=RECV <-My Ratings
https://bitcointalk.org/index.php?topic=857670.0 GAWminers and associated things are not to be trusted, Especially the "mineral" exchange
vapourminer
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what is this "brake pedal" you speak of?


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January 08, 2012, 12:56:12 PM
 #10

I run the directCU version of that card on the rig Im typing on now (my "daily driver" rig) with gcminer, 11.11 drivers, no flags aside from intensity and the flags for auto clocking, fan and temp limits. 1000 core, 900 mem 1.174 v. gives around 315 mh/s and temp is regulated to 74 C via cgminer. runs stable for weeks at a time, might go longer but I usually have to reboot for some unrelated reason or another.

I wound up replacing the stock TIM with artic cooling MX-2 as the stock stuff sucked, card ran way to hot for my liking before the switch.
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January 09, 2012, 10:49:39 PM
 #11

cgminer 2.0.8, default settings. I have four of these 6870s, 305MHash each @ 950MHz. Default voltage.
I think your miner software is outdated.

5830 mining for life
celcoid
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January 10, 2012, 01:31:03 AM
 #12

I'm using GUIminer
Aion2n
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MSI R7970 Lightning


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January 10, 2012, 09:07:14 PM
 #13

Ok right now I am using this card
http://www.newegg.com/Product/Product.aspx?Item=N82E16814102948

running at 950core, 300memory, and 1.175v with 75C @60% fan speed.

I am using the newest GUIminer with 11.12 drivers

flags "-v -w128"

I am getting 284-287 Mhash/s

How can I increase my Mhash/s

Thanks,


Use v.11.10 drivers, phoenix 1.7.3 (-k phatk2 VECTORS BFI_INT FASTLOOP=false AGGRESSION=10) and run at  950core, 300memory and you get 310 Mhash/s

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