Well Im about to find out!
I have 2 x .37A fans im about to run up on another channel and see what happens.
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Well Im about to find out!
I have 2 x .37A fans im about to run up on another channel and see what happens.
It would be nice for someone to make some testing scheme that gradually rises power usage in each channel and to test AA5 in all three cooling modes to find out maximum handled output values in numbers (no cooling|passive heatsink|waterblock).
And while Shoggy wrote that due to possible different clearances using TIM paste instead of thermal pads on waterblock is not advised .. imho with some care it could be tested too, after all, AA5's schematics monitor temps and can switch off in case of overheat anyway.
Well the answer is...............
3 x 370mA fans at 4.4v drawing 300mA and 2 x D5 pumps at 7v is the safe limit with the shared 3&4 channels heating to 85c. Adding a 4th fan on the channel pushes it to draw 420mA and right on 95c.
Test Config
Ch1 Waterflow meter 68c
Ch2 1 x D5 running @ 7v 800mA 68c
Ch3 3 x 370mA fans running at 4.4v 300mA 85c
Ch4 1 x D5 running @ 7v 800mA 85c
This means in theory you could run 2 x D5s and 6 x 370mA fans across the other 2 channels. (i have a flow meter on ch1 which you could theoretically put another 3 fans on)
Maybe try to put fans on Ch1 as well instead of flow meter (and move one of D5 to it, to make them even more apart)
Problem is the PA2's dont accurately measure the Koolance flow meters where as the A5 does. Otherwise I would be using Ch1 for something more useful.
Phatboy69: i mean - just for time of max power output of AA5 tests.
Another time.. I have to get off to sleep for work in the morning!
How should I connect Aquaero XT, Aquaero LT and PA2.
PA2 must be connected via aquabus high so AE LT to aquabus low or vice versa?
@Paradoxxx: adjusting the fans to the temperature of the CPU/GPU will not make much sense. For example if you start a large program it will give a full load for a few seconds and the temperature will rise up - but also speeding up the fans in this scenario is worthless because the water temperature will not have changed at all in this short period.
@Draizien:
http://h7.abload.de/img/aquaeroproenuw.png
...and before someone asks for it:
http://h7.abload.de/img/aquaeroxt2n2v.png
(courtesy of BigKahuna)
@mBrane: sure, all fan channels can monitor the rpm signal - no matter if a fan/pump is connected to them or not.
@NKrader: using a poweradjust 2 standard for this setup would solve some "problems". When using two flow sensors directly on the aquaero you will have to reconfigure fan channel 1 for this so you will lose it for fans or a pump and will end up with three of them for two pumps and two groups of fans. With the poweradjust you can connect the second flow sensor there so it will not block fan channel 1 on the aquaero and since the poweradjust itself offers a powerful output you have 5 outputs now.
@pociej: an aquaero LT can not be connected to another aquaero. You have to use USB. Using an aquaero LT as a slave device is an idea which will take some time before it becomes reality.
-------
It is very likely that we will offer a new Beta 3 tomorrow. We were able to solve several problems that prevent the aquasuite 2012 to start on some PCs. There are also some other bug fixes.
Shoggy, any planned shipping date for poweradjust2 standard ? I received the faceplate but not my PA2 yet ;)
Also do i need any extra cable to connect the PA2 and AE5 ? Or everything is included ?
Have you ordered it directly from us? If so you can drop me a PM with your order number. AFAIK there are only ultra variants in stock but I can easily change them to a standard to get your order shipped. The necessary 3-pin cable for aquabus comes with the PA2.
Looking forward to BETA 3 - thanks shoggy :up:
Right - With a HUUGE risk of sounding like a noob :p: - Can anyone tell me how to set this thing up so that Fans 1 (for example) turn up and down with the water temp pretty please? No manual makes it all that bit confuzzling.
thanks in advance.
Thanks Shoggy, yes it was ordered directly from AC.de, PM sent :)
It may not be ideal but I think it can work, the fan speed can be set to "incrementally" increase with time right? During the start of the large program the fan speed will increase just a little and then return to normal. Or in the case of gaming, my GPU temps are usually at 37C idle, upon load it rises +10C as such I can increase fan speeds accordingly. If there was a flow/temp sensor all in one I would consider purchasing one.Quote:
@Paradoxxx: adjusting the fans to the temperature of the CPU/GPU will not make much sense. For example if you start a large program it will give a full load for a few seconds and the temperature will rise up - but also speeding up the fans in this scenario is worthless because the water temperature will not have changed at all in this short period.
Its pretty simple
First name your water temp sensor something useful like Water Temp1 and then setup a controller and name it something useful like Ch1 Fans.
Select the type of controller you want, for example use a set point controller to set the ideal temp for your water and then assign the water loop temp sensor to that controller.
You may want to set minimum power or rpm settings for the fan so that it wont stop completely if water temp is under your target temp. You will also need to check the hold minimum power check box for this to work.
Thats all i can do to help while at work. If you have problems I'll give you a detailed menu instruction when I have some time.
It sounds fine in theory but in practice it doesnt really do anything except create noise. It takes a good few seconds (if not minutes depending on your setup) for water temp to be effected whether being cooled or heated sufficiently to effect the operating temp of the CPU or GPU.
Using Water temp is a much smoother way of controlling fan speeds. I suppose you could have a max temp setting for the GPU temp and trigger a full speed fan alarm event as a back up to the normal controller/sensor for the GPU.
BETA 3:
http://aquacomputer.com/software.html
Your page was also removed after an upgrade?
Import a previously saved page does not work.
I did some reconfiguring today.
Ive loaded the 4 D5 pumps onto the controllers and they work a treat!
I have the following config now:
A5
Ch1 PA2 Fans
Ch2 D5-1 GPU Loop
Ch3 Exhaust Fans
Ch4 D5-2 GPU Loop
PA2's
Ch5 CPU Rad1 Fans
Ch6 CPU Rad2 Fans
Ch7 GPU Rad1 Fans
Ch8 GPU Rad2 Fans
Ch9 D5-1 CPU Loop
Ch10 D5-2 CPU Loop
Flowmeter 1 CPU Loop
Flowmeter 8 GPU Loop
Temp Sensors
T15 Ambient Air Temp
T13 Rad Air In Temp
T7 Internal Air Temp
T14 Rad Air Out Temp
T1 CPU Water in
T2 CPU Water out
T3 CPU Water Res out
T4 GPU Water in
T5 GPU Water out
T6 GPU Water Res out
T8 CPU Temp
T16 GPU Temp
Here's a 15min Furmark run with 15min cooldown.
What an amazing piece of technology!
Reallllly quiet for normal computing and light gaming, but an absolute powerhouse when required. All seamlessly controlled.
http://w7sp5a.blu.livefilestore.com/...st1.jpg?psid=1
http://w7sp5a.blu.livefilestore.com/...off.jpg?psid=1
Thats quite alot of sensor information!
Thank you for the hard work!
Beta 3 works great :)
http://www.abload.de/img/beztytuu0syh.jpg
Yes you can turn them down to the lowest start/run voltage of about 7.2v and the PA2 doesnt have any trouble at all. The D5s generally only draw about 1.5A at max power and .9A at the lowest as you can see in my monitoring pics. The 6 fans though pull 2.1A at startup and push the limit of the PA2, without some active air cooling they overheat when run at a low voltage. Thats why I have a ram fan cooler on the PA2's to help regulate temp.
Still confused, Shoggy. Why would an MCP-35X on a PWM connector "not start?"
I want to control 2 MCP-35X pumps, one on each PWM connector. I would then use fan channels 1 and 2 for RPM. Is this possible?
If I recall correctly, Aqua Suite's virtual sensors should allow me to monitor the MCP-35X RPM through motherboard RPM inputs, instead of wasting fan channels on the A5. Is this possible?
P.S. Where is the A5 Manual / User Guide?
Thx!
mBrane: MCP-35X can fully be regulated only from channel 4, which is fully featured 4-pin pwm channel as well. From all the rest of channels that are 3-pin analog voltage regulation channels, you technically CAN regulate MCP-35X, but just as much as any other DDC pump, via voltage regulation, which is at way less range (minimum rpms are way higher)/different range then one regulated via PWM and AA5 will heat up way more then via PWM, so you won't get 1:1 regulation of both pumps (probably wished for, if pumps are serial connected in one loop), and won't get benefits of PWM (less heat-up of controller, lower minimum rpm-s).
I at the end decided to workaround this aquaero5 limitation (who knows, maybe in future versions there will be more channels capable of both analog and pwm regulation, but so far Shoggy on my question answered that it was too hard to find space on PCB for other channels to add PWM mode too. +he claimed elsewhere, that even if release of new version is next day, he will deny it's possibility :D) by connecting and regulating simultaneously by PWM Y splitter that is customized a bit (most of them have rpm wire from one cut, i asked to readd it but with separate connector), but only rpm wire going to another channel.
@Churchy: I understand about channel 4, but I want RPM for each MCP-35X. Sharing RPM connector would not give accurate RPM readings (eg. could double reading!).
I also would never consider trying to voltage-regulate the MCP-35X; PWM only!
So, I still have my original questions:
Q: Can I use 2-pin PWM connectors to *control* 2 MCP-35X's?
Q: Can I use A5's or motherboard's fan channel RPM connectors to *monitor* each MCP-35X?
mBrane:that's why i wrote,"customised Y pwm splitter". - Y splitter that regulates simultaneously both pwm pumps from one pwm connector, with rpm wire only from one pump (so far like all the Y splitters) + rpm wire from 2nd pump instead of being cut goes to _separate_ 3-pin connector that i can connect to another channel, not for regulating, just to get rpm readings from 2nd pump too.
So as to your first question - i still haven't got my AA5, so i cannot say for sure, but imho pwm pump shouldn't be any different from pwm fans, and i should be able to regulate them both from that single pwm connector using mentioned Y splitter.
As i see the possibility to connect two mcp35x pump to Aquaero 5 (if it can handle them, that is) is first to convert standard mcp35x pump connectors into single full-fledged 4-pin one. So, you get such adapters, take out two pins of a fan header and stick them into 4-pin PWM header of mcp35x pump. Do the same with the second pump and then you have two pumps with power and PWM control provided via 4-pin fan headers. Then just follow the scheme below to connect pumps to Aquaero 5, and you should have rpm readings for each pump while both are controlled via same PWM signal
SpuTnicK: aren't black and red wires for MCP35X already on separate 4-pin molexes for direct connection to PSU? I don't see need to add extra unused wires on those connectors. Just more sleeving work :)
I think the best option is to connect the power for the mcp35x pumps directly to your PSU. Then, route each RPM line to an individual fan header on the AE5. Finally, join the PWM lines, and connect those to the PWM signal of the 4-pin fan header on the AE5.
cx-ray: = what i proposed in the beginning :) with customized standard pwm y-splitter with addition of missing tach wire to separate 3-pin connector.
I seem to be posting lots of double stuff...first I thought I was sleepy...but maybe it's because of the new forum layout. I'm just not seeing right :)
then i see no need to use aquaero 4-pin fan header for PWM pump control. just use CPU- fan header and monitor/control it as virtual sensor in aquasuite.
SpuTnicK: gains - regulation & monitoring from within aquaero (for AA's emergency shutdown to work), and no actual power load on AA5 leaving more power for fans connected to it.
If I want to control two loops and monitor two flow meters whats the best configuration.
Both loops are the same and as follows.
3x fans
1 Flowmeter (FM17N)
Laing DDC 3.25
1 inline temp sensor
My question is would I need a A5 XT or Pro and an LT, or use PA2's instead of the LT. It would be nice to have control over the pumps but not necessary. Running the pumps from PSU and just monitoring RPM is fine. I've seen in this thread that the PA2's and Koolance flowmeter don't read accuratly.
AA5 XT|Pro + LT imho will be cheaper then AA5 + PA2s per channel count you get.
North american distributors? Preferrably US and carries the full line.
So any ideas whats wrong with my AE5 Shoggy? More specifically that horizontal line right in the middle of my LCD.
Attachment 116184
Not to mention at the fact that the Aquasuite 2012 b3 won't upgrade my firmware to 1011. When I hit the button to "Upgrade Firmware Now" it just sits there and does nothing and the button becomes greyed out with no progress on the bar.
(removed an answer since it was wrong)
@ohms: I already had a look into your e-mail but had no time to answer yet and also wanted to get some advice from our electronic technician who already left. It is likely that you will have to exchange the display. If you want to do that yourself (pretty easy, it is only plugged to the board) we can send you a new one. If you don't want to try that yourself you will have to send it in for a repair.
One thing that you can try yourself. Remove the front cover, unplug the LCD and plug it in again. Maybe you are lucky and it is only a bad contact.
Well, I will also answer your question by e-mail tomorrow with maybe some further assistance.
Can someone confirm what the Aquacomputer Aquaero power connect cable is used for please?
Is it to shutdown the PC in the event of a triggered alert for example? or is it for use with the Aquaremote to power the system up and down.
thanks.
Both :-)
It can shutdown the PC in case of an alarm or start the PC with a timer. If you are only interested in the shutdown option you can also use a parallel connection from the wires of your power button (computer case) to the relay. In my opinion this method is easier to setup and you don't need the ugly adapter.
Wait...so now you can use the PWM channels for pump regulation? I thought they were meant for some other accessory and wouldn't work with pumps due to the range or something to that extent (can't search the forum as it isn't functioning at the moment).
is the Aquaero 5 able to shut down or turn off the pc when it detects a drop in flow through the sensor?
Thanks Shoggy, I await your response! I did try unplugging the LCD and plugging it in again and it did not help (Phatboy had suggested that to me on the Aqua Computer forums). As for exchanging the display, I have no problems doing that at all, it's easy enough work =)
cx-ray: only 4th, 4-pin, channel (that can regulate both analogous & pwm way), not those two 2-pin pwm channels.
Shoggy: hmm? you are speaking about those two 2-pin ones? so they have tachometric signal & pwm control pins and can be used PWM fans & pumps? Not ground & +12V that's regulated via pwm?
Shoggy, I'm skeptical after reading the spec. of the PWM connectors in the AE5 manual. They don't correspond with the Intel spec. at all. I'm afraid it will damage an MCP35X.
http://www.formfactors.org/developer...e_PWM_Spec.pdf
Beta 4 2012 is out. Looks good, installed and runs no problem.
Rough Google Translation below
Included in the aquasuite the firmware update is 1012 for the fifth aquaero This fixes the following bug in the release of the firmware aquaero 5:
NEW: LCD Hype support
- Errors in the control curve
- Error after standby with the poweradjust
- Lt aquaero now stores all the settings right
- Menu + minor errors in the error surface
NEW: time synchronization tool
In the installation folder there is a aquasuite aquacomputerTimeSync.exe, if that is called, then the time the PC is synchronized to the aquaero.
Theoretically, it is enough if you put a shortcut in the Startup folder. the program closes itself immediately after synchronization
The program synchronizes aquaero aquaero 5 and 4
With the delay parameters: [time] [time] = time in milliseconds, the synchronization is delayed, which can be helpful when in Windows, all is not loaded.
- Corrected temperature measurement of the fan channels
- If a single poweradjust connected to the aquaero 5 was withdrawn and this was in operation, all 10 fans were displayed
- All fans are included in poweradjust settings set to 100%
- Fan alarm menu selection was flawed
- Corrected for Drezahlüberwachung fan 5 to 10 (alarm)
- Boost Start from standby was not executed
- One fan was shown twice in the Logdatenauswahl
- Adapted to current monitoring poweradjust 2
- Alarm processing adapted at startup, adjustable waiting time at startup
- Seitenumschaltzeitbereich of ads has been extended
- Speed measurement of the fan connectors has been improved
- LED brightness of the keys for the inactive set
Sounds great.
installing
edit:
I made a Polish version, and I would like to send someone but do not know how ..
Someone knows how to pull out of Aquasuite language file? Or in which file look for translation?
Nevermind, you are right. I had the wrong things in mind. It will not work with the PWM channels.
As mentioned already in our forum that is not possible and it was a mistake that the translation menu was enabled. We already disabled it and have exchanged the download files. Unfortunately there is no way too keep your translation :(
Read most of this thread , im still confuse..
Is this correct, AQ5 can regulate speed of MCP35X when connecting PWM to AQ Channel 4 PWM while getting power from molex PSU??
Yes, that is possible.
NO, you can use the PWM signal of the 4th fan channel and split it with an y-adapter for two pumps.
That's what I'm planning to do. My AC order finally shipped and should be here next week, so prepare to see this thread jacked by me noob here gents :shakes:
Ok so to make sure I get this right too, 2x MCP35X fans -> using Y PWM splitter -> fan 4 channel + 4pin molex for each pump?
*EDIT: Aquasuite 2012 BETA 4 released people, in case you missed...
I'd be happy to PM you with my mailing address; this *should* have worked out of the box. Exactly *which* PWM standard did Aqua Computer target? :shrug: Furthermore, are you saying that fan channel 4 implements a *different* PWM standard than the PWM connectors?! :shakes:
For the price of the A5, and the target audience, and the likelihood that users will want to run 2 pumps, and since you have two "PWM" connectors on the A5, you *should* include that cable with the A5!
Now, I need to pay shipping on a cheap cable, and wait for the UPS man to arrive. Oh, and I can forget independently controlling my PWM devices when I have 3 PWM ports on a device that is *supposed* to be a controller. Did I say :cussing: yet?
The PWM channels use a PWM based power supply and are not meant for a PWM controlling signal like you have it on channel 4.
So this will be the first time I've ever used Aquaero controller. Can you guys give me a run down on what I should do first? The Aquaero 5 Pro is on its way to me right now so I don't have it in front of me.
This is what my loop will consist of:
Magicool 420 and 280 Rads
6 Noiseblocker Fans
EK Ram block
EK Gtx 580 block
EK Backplate
EK Supreme HF block
EK 250 Res
MCP 355 pump
Aquacomputer Laing DDC Pump top
Shoggy: IIRC you wrote once that 1-3 fan channels are not 4-pin pwm ones due to limited space constraints on PCB? But is circuitry/used chips in control PCBs theoretically capable of that for first channels? (and i wonder if it's DIY modable to enable it)
Maybe those two 2-pin power supply connectors of unknown usefulness/purpose can be removed and 1-3 channels be made like 4th one, dual analog & pwm regulation capable? Or at least 3rd one too alongside 4th?
It seems that by adding 4th fan channel capable of pwm control you opened up can of worms of unexpected popularity of that feature, especially when it coincided with swiftech releasing MCP35X. Imho it would greatly help to see AA5rev2 with even more pwm capable chans.
Phaseshift: in your place i'd connect ddc pump to some rightmost or leftmost fan channel on AA5, and connect fans "grouped" by their mounting spaces (eg. rad1 fans, rad2 fans, case fans) on rest of fan channels by eg. Y-fan splitte wires, so that channel with most of fans is placed furthest from channel with DDC pump.
looking at the youtube Demo Video i see that you are useing a mounting plate for the poweradjust 2 looks like it holds 3 poweradjust 2
can you buy this mounting plate in the states if so could someone link me to the site thanks.
This is it here. out of stock it says but hunt around for that one.
okay cool, so DDC on the left or right most (it doesnt matter? as long as its on the end?) and the rest I can use Y splitters for my fans.
Also what's a good flow meter that I can use with the AA5, I'll probably order it next time when I order the second GTX 580 block
Thanks for the help they will have more in stock on the 24th it looks like.
One more question i plan on running 4 pumps 2 per loop swifttech MCP 655 In this duel pump block
http://www.frozencpu.com/products/im...D5TOPP-BK.html
besides the aquaero XT 5 how many powerajust 2 would i need to run for this setup and control my pumps if posible.. i think i seen a few people here trying this same setup but never seen if they got it to work so any help would be a big help thanks.
It depends on what else you want to run.
I have 2 D5 pumps on A5 and 2 on 2 PA2s.
On the other A5 channels I have 2 fans on one channel and a single ram cooler fan on the other which cools the PA2s. The other 4 PA2s run 6 fans each and are right on the maximum amperage at max speed and max temp for the PA2s when running at 4v. The A5 is pretty much on the limit temp wise for my config too with the water block on it.
I've updated my Aquaero 5 XT mini build log here with some load testing results> http://www.xtremesystems.org/forums/...r-Installation!
With updated finished pics here> http://www.xtremesystems.org/forums/...T-Installation
Phaseshift: as long as biggest power users be it pump or fan group with largest number of fans is as far as possible to lessen heatup by them being side by side, to lessen chance of AA5 hitting thermal limits. Suggested way of putting them at ends is one of such ways.
For flowmeter you can buy Aquacomputer's one or Koolance's INS-FM17N.
Phaseshift: with one flowmeter there should be no problems, as there is separate connector for such. Only if you have two, then you have to dedicate one of 4 fan connectors for it. Just remember to calibrate in aquasuite appropriate impulse count per liter for particular flow meters to get right readings.
I wish I had the AE5 in front of me right now so I can work with it, its currently in transit :( thanks for the help churchy!
Phaseshift: i just remembered how it was for AA4 and taken another look at pics from first post by Shoggy (one from backside of the PCB with sticker on it explaining what connector is for what. Probably 'flow' on top is for flowmeter).
PWM means only pulse width modulation which is exactly what these connectors do: they use a modulated 12V signal. The power is controlled by the width of the power signal within this modulation.
So, what are those two 2-pin PWM(16kHz) connectors are for?
You can connect anything that is able to run with a PWM power source. It is ideal for effect stuff like LED stripes for example.
Shoggy: and what power output limitations are for those two 2-pin pwm connectors? And should it also be distracted from 60W for whole AA5?
So I guess, one pin of that PWM connector is the actual PWM signal and the second is ground (GND)?
1 Amper
Shoggy you are the man for sending me a new LCD screen to replace my defective one! I just got finished installing it and everything is working 100%! :up:
Thank you very much sir, you are a gentleman and a scholar :yepp:
Someone already tried to play with LCDHype?
Hey Shoggy, is it possible to buy the LT version now and then add on the screen later?
And can a pump like an MCP 355 be directly connected to the LT version or do I need more accessories? Thanks.
I know some of these questions have been answered, but its just a bit confusing right now.
Another new find from the german threads over at AC...
If you want startboost to work on the PA2s connected to the AE5 you have to first disable startboost on the PA2s by connecting via USB to each PA2 individually and turn startboost off in Aquasuite 4.72.
I managed to stop my fans from peaking at 2.1A and tripping an overload as they sometimes would during startup. I set a 60% startboost in aquasuite 2012 after disabling in PA2s to get it to work!
From the technical side you can upgrade an aquaero LT to PRO or XT because all variants use the same base controller. Well, we do not offer any official upgrade kits so you could order all necessary parts which would end in a much higher price.
If you want to run a pump directly on the LT device you should get at least the passive cooling block. If you also want to connect some fans to all other channels the waterblock would be the better decision.
? for the A5 Guru's
I purchased the water block for my A5, however I just recieved my A5 and the heatsink is massive and not like the photo's on this site. The unit is also heavier than expected. I plan to power 5 fans Nanoxia fX12-2000 @ 2.36W - .28A and one D5. In short , I want to replace existing parts a BigNG and Matrix Orbital LCD because of software issues on my Win7 64bit pc. Can I avoid the waterblock until I upgrade my case with a bigger radiator? If so seems I could spread the fans between Chan 1-3 and put the D5 on Chan 4.
Like this:
Chan1 =1 Internal
Chan2 =2 x Radiator Fans
Chan3 = 2 x Case Fans
Chan4 = 1 x D5
Is the Tubmeter supported on The A5 with the Aquabus cable for the Tubmeter?
You'll be fine without the water block for that config. Yes the Tubemeter does work on the low speed aquabus port.
Put the 1 internal fan on the channel next to the one your putting the D5 on.
The channels share a temp sensor for each pair 1&2 and also 3&4 so you want the lowest load on the channel next to the D5.
Cheers
Cheers PhatBoy69 -- Just finished the transplant from the BigNG with no issues. Temps holding at 64C for the group with no the D5 set @ 9.6V or 75% power. I will probably use the water block when I move to my new case to control temp swing a little better.
Anyone get the remote to work ?
Mine just worked straight out of the box.. Batteries in the right way? :)
Figured it out , its line of site IR-Remote. :up:
Great job on the software, as fellow developer I do understand the amount of time and effort that went into this .NET WPF application. To the entire Dev / Design team @ AquaComputer - Job Well Done :clap:. When I get my hands on the SDK, should be couple of hours to create some sort of email alert triggered by temp and/or flow . I wonder if this is in the works.
Hey Shoggy,
I just got my xt today, can you please try and help me on a few things ?
- I can not run more then one 370ma fans per channel - the vrm temp will get to 95C.
- The f1 and f2 keys are being pressed by them selves... I touch nothing and I hear the f1 or f2 key being pressed - what can I do ?
- The XT does not come with an extra black face plate ?
- What is the red light on the back ?
Thank you !
Great product - I enjoy it alot :)
More then one 4.5W fan per channel heating up AA5 with passive heatsink? Weird, it should handle much much more imho. Hmm, is heatsink attached well to chips? Maybe some TIM issue?