Radeon VII (2nd gen consumer Vega GPU) - Page 16

Lorenzo · 2019-07-13, 21:36

Quote:

Originally Posted by Prime95

Too small a sample set to draw any real quality conclusions. Good luck with your Sapphire card. I followed the excellent Linux instructions in this thread to get the maximum throughput at a reasonable wattage.

BTW, check your power supply. This card wants two 8-pin power connections.

Thank you for remind me! I just rechecked my today's order for a new machine. So on Tuesday hoppely i will get a new shiny Chieftec Power Smart GPS-1000C http://www.chieftec.eu/en/psus/ps-2/...gps-1000c.html

So this PSU has enough power for R7 (1000W) and 2 lines PCIE.

kriesel · 2019-07-16, 16:37

Quote:

Originally Posted by Prime95

Should I rush out and buy a couple more?

George hasn't responded to my offer of free hardware testing, so I've put one on order myself. Supply is really dwindling. Taking a chance on an xfx.
Wouldn't it be great if this was a prelude to a Radeon VIII? (Not even a rumor; just wishful thinking)

https://www.overclock3d.net/news/gpu...raphics_card/1

maxzor · 2019-07-17, 20:31

Are deals allowed?
This english one :
https://www.facebook.com/marketplace...3168203581300/
Already got a spanish one, this is tempting for speculation...
Gamers are giving them currently! Saw as low as 500€, facebook seems like the place for steals

Prime95 · 2019-08-11, 03:09

Two questions:

1) Has anyone tried mods to get temps down? I have two cards that are throttling. I just tried the "washer mod" as well as adding 2 more case fans. It helped a tiny bit but still throttling. I guess the next step would be to try new thermal pad or paste?

2) Newegg has restocked Asrock cards. I only have room left in one computer and it is Windows 10. The Linux instructions in this thread are outstanding. Is a Windows environment difficult to set up?

paulunderwood · 2019-08-11, 04:26

Quote:

Originally Posted by Prime95

Two questions:

1) Has anyone tried mods to get temps down? I have two cards that are throttling. I just tried the "washer mod" as well as adding 2 more case fans. It helped a tiny bit but still throttling. I guess the next step would be to try new thermal pad or paste?

2) Newegg has restocked Asrock cards. I only have room left in one computer and it is Windows 10. The Linux instructions in this thread are outstanding. Is a Windows environment difficult to set up?

I run /opt/rocm/bin/rocm-smi --setfan 255 which is loud and in danger of wearing out the fans' bearings, but it keeps it cool, along with a room fan aimed at the open case side, with a summer diurnal range of 10C, max 80C at the "junction"

Code:

========================ROCm System Management Interface========================
================================================================================
GPU[0] 		: Temperature (edge): 57.0 c
GPU[0] 		: Temperature (junction): 72.0 c
GPU[0] 		: Temperature (mem): 61.0 c
================================================================================
==============================End of ROCm SMI Log ==============================

xx005fs · 2019-08-11, 07:06

Quote:

Originally Posted by Prime95

Two questions:

1) Has anyone tried mods to get temps down? I have two cards that are throttling. I just tried the "washer mod" as well as adding 2 more case fans. It helped a tiny bit but still throttling. I guess the next step would be to try new thermal pad or paste?

2) Newegg has restocked Asrock cards. I only have room left in one computer and it is Windows 10. The Linux instructions in this thread are outstanding. Is a Windows environment difficult to set up?

A1) I personally don't get a chance to own a Radeon vii, but I have found this method on Reddit that someone claimed to drop 40C on his stock cooler (link: https://www.reddit.com/r/Amd/comment...m_source=share). The redditor realized that part of the vapor chamber heatsink that contacts the chip have significant high spots, causing poor contacts, then sanded down the contact flat and polished it along with replacing the stock graphite thermal pad with regular paste. This method does seem like a hassle and I can't personally confirm if it works unfortunately.
In general, AMD cards undervolt quite well, and I personally undervolt my Vega 64 down to 0.9V to slam down power consumption from 300W down to 150W, losing only around 10% speed. The memory timing can be tweaked using amdmemorytweak on both Linux and windows, but on windows it can also undervolt and overclock. By loading an xmr mining timing into my Vega I managed to increase my performance by almost 8% for free, and I am definitely expecting more for Radeon vii due to its faster memory.

A2) on windows, just download the driver stack from AMD and it will automatically install the Radeon settings on the computer. Then using Radeon settings click gaming -> global settings and global wattman settings to find the overclocking settings. It has a voltage to clock speed curve for Radeon vii (and old power state for older gpus) which can be used to tweak clock and voltage. Scrolling down there's more options on fan control and power limit, which could be useful if the core clock drops instead of hbm.

preda · 2019-08-11, 09:04

You could lower the fan a bit, targeting a junction temperature of 90-95C which is "cold" (101-105C on junction is "ok").

Quote:

Originally Posted by paulunderwood

I run /opt/rocm/bin/rocm-smi --setfan 255 which is loud and in danger of wearing out the fans' bearings, but it keeps it cool, along with a room fan aimed at the open case side, with a summer diurnal range of 10C, max 80C at the "junction"

Code:

========================ROCm System Management Interface========================
================================================================================
GPU[0] 		: Temperature (edge): 57.0 c
GPU[0] 		: Temperature (junction): 72.0 c
GPU[0] 		: Temperature (mem): 61.0 c
================================================================================
==============================End of ROCm SMI Log ==============================

diep · 2019-08-11, 09:55

Watercooling is the only way. The high pitch noises of gpu's at full throttle my ears and brain will not be able to handle for more than couple of hours.

Yet be careful to make your own custom watercooling. I keep busy improving it :)

For watercooling cpu's i've kind of found the right setup.

around 7 dollar for a radiator 8x8 cm. 2 fans (silent) at both sides. They will speedup the rpm of each other. Needed is 2mm H2O pressure of the fans (which is why you want 8 cm fan in this case, as larger fans do not deliver enough pressure and fans above 8 cm at say 2k rpm or above are simply too loud when that air hammers onto the radiator.

edit: the fans i use, i do not want to use sleeve bearing fans. They soon get very noisy if they need to run 24/24. I use oil bearing type fans. They are a bit more expensive - yet China has great deals there if you buy 10 at a tad lower RPM. You want 2k rpm maximum for 80mm fans. When put at both sides they already will speedup to roughly 2200 rpm anyway as they speedup each other.

then a 2 dollar pump from china that works on 12 volts, though i also have pumps there that work on 230 volt.

the pump has to be submerged of course, i do that in a 1 liter plastic box that previously contained ice.

and water used is demineralized water which is 0.45 euro here a liter at Kruidvat store. Other stores, especially gasstations can easily ask 3 euro or more a liter.

tubing is simple 9/12mm tubing.

On the cpu sockets i put simple 2 dollar waterblock, though currently the below link, the dude asks 3.62 - he wants to get rich fast that Chinese. It's just for the illustration.

https://www.ebay.com/itm/New-Water-C...cAAOSwb3Jc48ND

I 3d printed a small plastic to tighten the block 'spring like' to the socket. It has to put some force onto the socket - and some grease in between.

This setup removes enough for a single socket that's under 100 watt effectively. Be careful that most TDP numbers are just marketing numbers. Yet 80 watt TDP it should be able to handle very well.

Obviously you cannot use this for a GPU. You want to remove more watts there.

For GPU i experimented with different stuff - yet what i go try next there i'll make a picture and post here when it works ok some time from now :)

(because i don't know whether 1 moped radiator with 2 fans on it that are silent removes enough watts - i guess must remove 500 watt or so of that Titan-Z gpu).

For the cpu setup the only real problem is getting the plastic bucket that contained ice, to get it water proof with the hoses going in and out.

Yet i progressed a little there. Every small hole you create, watervapour will get out of, because it's hotter than the room temperature.

Special plastic storage buckets here, that get sold just for storage in supermarket, they usually are from a different sort of plastic (blue transparant) which works VERY BAD here for watercooling. And a bucket of ice i've eaten frees up a free box anyway :)

As a result some of the watercooled buckets i have, i need to add a little demineralized water now and then.

It's on my list to improve that.

Ready to use watercooling kits would need less maintenance there. Usually they use very thin hosing though and have loud ventilator+radiator combi's.

edit2: please note that if you keep temperature down of todays cpu's and gpu's around room temperature, they eat easily 10% or even 20% less power than when they run hot and cooling it well also takes care it works longer.

running gpgpu on gpu's with stockfans never worked for me, It always overheated. You just can't push enough air into the computer case without making huge noise. the problem is not so much the total amount of air needed - it's the air pressure needed. It's the air pressure that cools, not the total amount of air.

diep · 2019-08-11, 10:11

Quote:

[snip] ... In general, AMD cards undervolt quite well [/snip]

[

Most codes for gpu's are not so well written and are mainly dependant upon bandwidth the RAM on the GPU delivers.

Now obviously the RAM eats far less power than the gpu cores itself.

Obviously as long as that bandwidth keeps kind of intact then slowing down the Mhz'es of the GPU, whatever method you use there, can be a method to achieve this.

Even if you slam performance of the GPU cores - the bandwidth of the RAM is what determines performance in most cases.

That's not the case with TF and similar applications though :)

edit: in some cases no need to tweak voltages can just adjust gpu Mhz manual. I can on one of the AMD gpu cards here simply in the AMD panel under windows. Yet is old driver of AMD and old card so new card might be different sort of software they deliver with it.

preda · 2019-08-11, 10:53

Quote:

Originally Posted by Prime95

Two questions:
1) Has anyone tried mods to get temps down? I have two cards that are throttling. I just tried the "washer mod" as well as adding 2 more case fans. It helped a tiny bit but still throttling. I guess the next step would be to try new thermal pad or paste?

I run all my Radeon VIIs on sclk 4 (--setsclk 4). In addition, I use the script below to lower the power use from ~180W to ~150W for one GPU. At 150W the GPU is much easier to cool.

cd /sys/class/drm/card1/device
echo "s 1 1640" > pp_od_clk_voltage
echo "m 1 1150" > pp_od_clk_voltage
echo "vc 1 1304 785" > pp_od_clk_voltage
echo "vc 2 1801 1060" > pp_od_clk_voltage
echo c > pp_od_clk_voltage
~/ROC-smi/rocm-smi -d1 --setsclk 4

The elements that play into lower power use is the undervolting (the "vc" lines) and the underclocking (the "s" line that scales the frequencies down from 1800 to 1640). With such a setup I have t-junction of 100C, fan 2330RPM, power 152W, perf 939us/it at 5M FFT. (this particular GPU is difficult to cool because it takes in the hot exaust from a nearby GPU)

preda · 2019-08-11, 11:08

What I consider a hardware design fail on the Radeon VII is the large red "Radeon" LED logo placed on top of the GPU that covers the air exaust that would have been there (moving the hot air "up" from the GPU) otherwise. As a result, most of the hot air is directed downwards under the GPU.

2019-07-17, 20:31	#168
maxzor Apr 2017 2²·5 Posts	Are deals allowed? This english one : https://www.facebook.com/marketplace...3168203581300/ Already got a spanish one, this is tempting for speculation... Gamers are giving them currently! Saw as low as 500€, facebook seems like the place for steals Last fiddled with by maxzor on 2019-07-17 at 20:41

2019-08-11, 09:55	#173
diep Sep 2006 The Netherlands 3⁶ Posts	Watercooling is the only way. The high pitch noises of gpu's at full throttle my ears and brain will not be able to handle for more than couple of hours. Yet be careful to make your own custom watercooling. I keep busy improving it :) For watercooling cpu's i've kind of found the right setup. around 7 dollar for a radiator 8x8 cm. 2 fans (silent) at both sides. They will speedup the rpm of each other. Needed is 2mm H2O pressure of the fans (which is why you want 8 cm fan in this case, as larger fans do not deliver enough pressure and fans above 8 cm at say 2k rpm or above are simply too loud when that air hammers onto the radiator. edit: the fans i use, i do not want to use sleeve bearing fans. They soon get very noisy if they need to run 24/24. I use oil bearing type fans. They are a bit more expensive - yet China has great deals there if you buy 10 at a tad lower RPM. You want 2k rpm maximum for 80mm fans. When put at both sides they already will speedup to roughly 2200 rpm anyway as they speedup each other. then a 2 dollar pump from china that works on 12 volts, though i also have pumps there that work on 230 volt. the pump has to be submerged of course, i do that in a 1 liter plastic box that previously contained ice. and water used is demineralized water which is 0.45 euro here a liter at Kruidvat store. Other stores, especially gasstations can easily ask 3 euro or more a liter. tubing is simple 9/12mm tubing. On the cpu sockets i put simple 2 dollar waterblock, though currently the below link, the dude asks 3.62 - he wants to get rich fast that Chinese. It's just for the illustration. https://www.ebay.com/itm/New-Water-C...cAAOSwb3Jc48ND I 3d printed a small plastic to tighten the block 'spring like' to the socket. It has to put some force onto the socket - and some grease in between. This setup removes enough for a single socket that's under 100 watt effectively. Be careful that most TDP numbers are just marketing numbers. Yet 80 watt TDP it should be able to handle very well. Obviously you cannot use this for a GPU. You want to remove more watts there. For GPU i experimented with different stuff - yet what i go try next there i'll make a picture and post here when it works ok some time from now :) (because i don't know whether 1 moped radiator with 2 fans on it that are silent removes enough watts - i guess must remove 500 watt or so of that Titan-Z gpu). For the cpu setup the only real problem is getting the plastic bucket that contained ice, to get it water proof with the hoses going in and out. Yet i progressed a little there. Every small hole you create, watervapour will get out of, because it's hotter than the room temperature. Special plastic storage buckets here, that get sold just for storage in supermarket, they usually are from a different sort of plastic (blue transparant) which works VERY BAD here for watercooling. And a bucket of ice i've eaten frees up a free box anyway :) As a result some of the watercooled buckets i have, i need to add a little demineralized water now and then. It's on my list to improve that. Ready to use watercooling kits would need less maintenance there. Usually they use very thin hosing though and have loud ventilator+radiator combi's. edit2: please note that if you keep temperature down of todays cpu's and gpu's around room temperature, they eat easily 10% or even 20% less power than when they run hot and cooling it well also takes care it works longer. running gpgpu on gpu's with stockfans never worked for me, It always overheated. You just can't push enough air into the computer case without making huge noise. the problem is not so much the total amount of air needed - it's the air pressure needed. It's the air pressure that cools, not the total amount of air. Last fiddled with by diep on 2019-08-11 at 10:04

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2019-08-11, 03:09	#169
Prime95 P90 years forever! Aug 2002 Yeehaw, FL 16557₈ Posts	Two questions: 1) Has anyone tried mods to get temps down? I have two cards that are throttling. I just tried the "washer mod" as well as adding 2 more case fans. It helped a tiny bit but still throttling. I guess the next step would be to try new thermal pad or paste? 2) Newegg has restocked Asrock cards. I only have room left in one computer and it is Windows 10. The Linux instructions in this thread are outstanding. Is a Windows environment difficult to set up?

2019-08-11, 11:08	#176
preda "Mihai Preda" Apr 2015 3×457 Posts	What I consider a hardware design fail on the Radeon VII is the large red "Radeon" LED logo placed on top of the GPU that covers the air exaust that would have been there (moving the hot air "up" from the GPU) otherwise. As a result, most of the hot air is directed downwards under the GPU.