Can't get Sapphire 280x's over 669 kh/s -also separate 64-99% throttling issue

Gazza1

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I am running 12.6 on the other machines. I never upgraded drivers because apparently newer versions don't allow more than 5 cards in windows 8. With those drivers I can run 6 cards in Win 8.

Quote from: sesko on January 04, 2014, 02:12:48 PM

thread concurrency overrides shaders, no point having both in the startup.

try it. Wink

I tried both ways one or the other and each way was slower with no shaders and a TC of either 10240, 11200, 8192, or 0. If I dropped TC and just used Shaders then cgminer would just add a default parameter of 10240 for TC.

You are right though, on my buddy's rig when we set his up we used 2048 for shaders and TC 0 and he gets 745-755's across the board.

Scrypt settings are voodoo I tell ya Cheesy

Maybe it's the version of cgminer. I could try an older version.

sesko

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thread concurrency overrides shaders, no point having both in the startup.

try it. Wink

mx19

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Merit: 10

Just out of interest which drivers are you using for your 7970's?

I am using all the updated drivers but cannot seem to get over 680kh/s and anything over 971 core clock returns even lower rates...

Thanks!

Gazza1

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Smack me in the head. I forgot to update the drivers. I have an activediskimage already set up to go that I just load onto new rigs so everything sets up in a snap. The 7970s run like champs on the older drivers, but the 280x's are now running better with the new drivers.

Catalyst 13.12 and SDK 2.9

After trying a bunch of the typical random combinations and scenarios I've settled on these settings for now which get 729s'/749's +/- respectively. So much better.

--lookup-gap 2 --thread-concurrency 11200 --shaders 2048 -g 2 -I 13 --worksize 256 --expiry 1 --scan-time 1 --queue 0 --no-submit-stale --gpu-vddc 1.131 --gpu-engine 1020,1050,1050,1050,1050 --gpu-memclock 1500 --gpu-fan 90 --gpu-powertune 0

I'll have to spend some time seeing if I can get vddc any lower "round the clock stable".
GPUZ reports 1.039-1.078 using 1.131 in cgminer, so I guess that seems pretty good.

Oh yeah, and you guys rule Cool

Now that leaves the throttling issue on the cards that get over 73C which I know everyone seems to be having, I think I'll make a special thread for that.

Gazza1

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Activity: 238

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oh geez I think I know what it might be that I completely overlooked, I'll try it and report back

Gazza1

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Activity: 238

Merit: 100

Quote from: sesko on January 04, 2014, 12:42:21 PM

check this thread: https://bitcointalksearch.org/topic/m.4277162

brings the cards to mid 500s =/ weird I know

Gazza1

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I hear ya. It's boggling my mind too. I may give that VBE7 a try later on if all else fails

sesko

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check this thread: https://bitcointalksearch.org/topic/m.4277162

pdaddy

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Quote from: Gazza1 on January 04, 2014, 12:23:56 PM

forgot to mention, they are the OC cards. I previously tried increasing powertune to +20 in afterburner, cgminer, and catalyst control center all at separate times and it seems to have no effect

You think maybe the softwares aren't controlling it and I should try the VBE7? I'm just afraid to bork a card. I already borked the 2nd bios on one of them trying to flash 7970 15.039 bios

Hard to say as there is always a risk in bricking your card. Flashing just another bios is something I would never do. In your case I do not know what to recommend. In my care I changed the bios of my 7950 decreasing the vcore, increasing the gpu and memory clock and increasing the tdp and making adjustments and flashing those changes a dozen times without any trouble.

In the end I settled for a vcore of 1.100V from 1.256V, a core clock of 1050MHz from 950MHz, memory clock at 1500MHz from 1250MHz and a tdp of 200W from 160W an my 7950 vapor-x. This is stable at both gaming and mining and coretemp < 65C, vrm temps < 77C.

Gazza1

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Activity: 238

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forgot to mention, they are the OC cards. I previously tried increasing powertune to +20 in afterburner, cgminer, and catalyst control center all at separate times and it seems to have no effect

You think maybe the softwares aren't controlling it and I should try the VBE7? I'm just afraid to bork a card. I already borked the 2nd bios on one of them trying to flash 7970 15.039 bios

pdaddy

newbie

Activity: 50

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Those are probably Vapor-x cards? If so get VBE7 and increase TDP in the powertune tab by 20-25% using original bios image and flash it to the card. Observe CPU and VRM temps with GPUZ.

Gazza1

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Activity: 238

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All cards are Sapphire OCs

All my 7970s run 765's with 1080/1500

I haven't been able for the life of me get my 280x's to run faster than 661-675.

I've tried;

1000,1010,1020,1030,1040,1050,1060,1070,1080,1090,1100

/ 1500

using shaders 2048 in combination with TC 8192, 8193, 10240, 11200, and 0, deleting the tahiti file each time. I also tried all TC's without shaders.

They are on the same mobo and cpu's as my 7970s. MSI z77a-gd65 with ivy bridge cpus.

They aren't throttling because they are by a cold open window. temps are in the 60s with gpu usage at constant 99%

I'm not willing to overvolt memory so max memory I would do is probably around 1600ish. I prefer to undervolt everything.

Also, powertune +20 has no effect after trying it within cgminer, afterburner, & catalyst.

--------------------------------------------------------------------
see below for throttling issue;

Although I DO have a rig in the living room with 3 280x's that ARE throttling which is a bitch with gpu usage bouncing from 64 to 99%. Has anyone found a bios that worked yet to fix the throttling issue on Sapphire 280x? I tried flashing my 7970 bios to one of my 280x then the damn card wouldn't post.

Thoughts?

PSUs are all ample power Corsair HX Gold with powered risers for every card

Topic: Can't get Sapphire 280x's over 669 kh/s -also separate 64-99% throttling issue (Read 3008 times)