The best I could get was this
27.1MH/s using 170watts running at 950/1500 using 0.938V
So about ~ 6.3W/MHS.
27.1MH/s using 170watts running at 950/1500 using 0.938V
So about ~ 6.3W/MHS.
with a bios mod?
can u share the mod?
Also try it on Dual?
Topic: One way to undervolt R9 300 series cards by BIOS mod - page 3. (Read 27092 times)
with a bios mod?
can u share the mod?
Also try it on Dual?
The best I could get was this
27.1MH/s using 170watts running at 950/1500 using 0.938V
So about ~ 6.3W/MHS.
27.1MH/s using 170watts running at 950/1500 using 0.938V
So about ~ 6.3W/MHS.
But the memory controller load is usually over 90% if I set the frequency to be 1250 MHz. I think Etehreum uses a lot of memory access.
yes sir ,in fact Etehreum uses a lot of memory access
I got a 390 ASUS STRIK and just wondering whats the best efficiency one has gotten.
So far the best I can do is 1.03V (shown in MSI afterburner voltages) at 1050/1500 and its about 7.5W/MHS.
So far the best I can do is 1.03V (shown in MSI afterburner voltages) at 1050/1500 and its about 7.5W/MHS.
Hi Bobben 2,
thx for your detailed post. Everything is fine for our R9 390 cards in common, but we really expected some troubles in stability with only several cards out of 100+.
You've already edited bios for 380X, could you, pls., share it with us?
Thank you in advance.
thx for your detailed post. Everything is fine for our R9 390 cards in common, but we really expected some troubles in stability with only several cards out of 100+.
You've already edited bios for 380X, could you, pls., share it with us?
Thank you in advance.
Thanks will look into that
when you say 160w do you mean 160w measured at the wall or after you have calculated it with the power efficiency of your psu?
I saved 160Watt per card with a homemade modded bios. Gigabyte G1 390. (using the claymore dual miner)
Etherum: 27MHASH
siacoin: 415MHASH.
The voltage is not locked, you need to use a hex editor and reverse engeneering. (cracking)
Etherum: 27MHASH
siacoin: 415MHASH.
The voltage is not locked, you need to use a hex editor and reverse engeneering. (cracking)
You said you saved 160W per card. What is the power consumption per card on the wall after the mod?
I saved 160Watt per card with a homemade modded bios. Gigabyte G1 390. (using the claymore dual miner)
Etherum: 27MHASH
siacoin: 415MHASH.
The voltage is not locked, you need to use a hex editor and reverse engeneering. (cracking)
Etherum: 27MHASH
siacoin: 415MHASH.
The voltage is not locked, you need to use a hex editor and reverse engeneering. (cracking)
I tried to undervolt my gigabyte r9 390 via this method, as you know these cards are voltage locked!
i started with 1060 as final voltage and go up to 1130...
but no success, stability issue in dual mining, any further voltage does not has considerable effect on temperature
i started with 1060 as final voltage and go up to 1130...
but no success, stability issue in dual mining, any further voltage does not has considerable effect on temperature
You just need to reduce the core frequency to increase the stability. I run the core at 970 MHz at 984 mV.
I tried to undervolt my gigabyte r9 390 via this method, as you know these cards are voltage locked!
i started with 1060 as final voltage and go up to 1130...
but no success, stability issue in dual mining, any further voltage does not has considerable effect on temperature
i started with 1060 as final voltage and go up to 1130...
but no success, stability issue in dual mining, any further voltage does not has considerable effect on temperature
In the HawaiiBiosReader, where do we change the default GPU core/memory frequency? I want default to be 950/1000MHz.
In the picture above, you change the GPU/Mem clock 1 from 1000/1250 to 950 1000. that should work for you.
I tried the above procedure. It is working well.
In the HawaiiBiosReader, where do we change the default GPU core/memory frequency? I want default to be 950/1000MHz.
In the picture above, you change the GPU/Mem clock 1 from 1000/1250 to 950 1000. that should work for you.
In the HawaiiBiosReader, where do we change the default GPU core/memory frequency? I want default to be 950/1000MHz.
basically easy as this:
?
?That is right. But there are some rule guiding the mod procedure. You need to follow the rules to mod successfully.
basically easy as this:?
? The question is still there. Is it possible to mod memory voltage (not core or aux voltage) on Hawaii via bios editing?
Memory voltage (ie MVDDC) can not changed by bios modification.
IR3567B on Hawaii / Grenada controls VDDC (core) / VDDCI (aux) only.
Only cards which allow software manipulation of MVDDC "out of the box" are Asus 290X Matrix and MSI 290X Lightning, which I don't think most would buy here given the context of use on this forum. So far I have not seen any R9 300 series cards with MVDDC "out of the box".
MVDDC can only be changed with "hard vmod", google the terms 290x mods - kingpincooling.com 1st hit is correct link, in 1st post 1st link is document showing "hard vmod". In this post by The Stilt you'll see it may yield you only small power usage drop.
That is bad bad news, according to Elivop, for the 6 R9 nano, if you reduce the mVDDC by 100 mv, it will save 50W. So it should be more for 390 rig.
I tried to copy the 900MHz memory strip to the 1000 MHz strip of the XFX R9 390, I found it does not increase the hash speed. Any reason for that?
I thought the memory latency is importnat.
I thought the memory latency is importnat.
The question is still there. Is it possible to mod memory voltage (not core or aux voltage) on Hawaii via bios editing?
Memory voltage (ie MVDDC) can not changed by bios modification.
IR3567B on Hawaii / Grenada controls VDDC (core) / VDDCI (aux) only.
Only cards which allow software manipulation of MVDDC "out of the box" are Asus 290X Matrix and MSI 290X Lightning, which I don't think most would buy here given the context of use on this forum. So far I have not seen any R9 300 series cards with MVDDC "out of the box".
MVDDC can only be changed with "hard vmod", google the terms 290x mods - kingpincooling.com 1st hit is correct link, in 1st post 1st link is document showing "hard vmod". In this post by The Stilt you'll see it may yield you only small power usage drop.
The question is still there. Is it possible to mod memory voltage (not core or aux voltage) on Hawaii via bios editing?
I'm pretty sure it's possible on "hawaii" just haven't come across a 390 where it is..
But gupsterg will and can answer that better and more clearly :-)
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