So I pulled the trigger and bought barebone J6413 from CWWK (barebone N5105 was sold out). ETA December, 2. Now time to decide on RAM, Disk, switch and AP
I think that since the WAN and LAN port are constantly communicating to something, even at idle, it should keep ASPM from kicking into any deep sleep state at least.There's latency turning CPU and PCIe from low sleep states to active, so if they are idle/sleeping, the first time you access a site, it will have the added time of the hardware waking up.
I don't know if it's ms or us (micro-seconds) delay, if usec. we won't notice it.
Regarding only the latency, the conclusion from your link is:Found this post about C-state latency and intel servers, and it shows the exit latency for C3 as 70µs.
The system was spending 90% of the time in C7, so deeper sleep. It doesn't look like they tested with the limit at C3.Regarding only the latency, the conclusion from your link is:
"In this article we have seen that processor power management has significant effect on response times with Hasura. Using the performance governor and disabling idle states improves the average latency by almost 50%."
From what I fast read, looks like C-states adds a few ms latency in their server.
I'll try to look into this when I receive my box.
I also wanted (encrypted) DNS server, NTP server, IP (blacklists) blocking and suricata/snort.I guess because I added a couple extras (FQ-CoDel + AdGuard), the CPU is staying more active and not benefitting as much from C3.
Sorry for the repeated questions regarding BIOS settings. Is it here where you enable/choose the C states of the system?EDIT : Looks like PowerD isn't doing anything either... Enabled or disabled, power draw is the same. With C2 enabled, CPU idles at 800MHz and boosts to 2.8GHz, with or without PowerD.
I didn't change the C-state settings in BIOS, those were left to defaults. I only modified the C-states under "Tuneables" in opnsense.Sorry for the repeated questions regarding BIOS settings. Is it here where you enable/choose the C states of the system?
i'll have to figure out how to tweak that in pfsenseI didn't change the C-state settings in BIOS, those were left to defaults. I only modified the C-states under "Tuneables" in opnsense.
Get direct from Changwang, probably the best source and you can be shure you get the latest version. v5 is the latest. My v4 took about 14 days for shipping to Europe, shipping was done just the day after I orderd.If I get a topton/kingway/what ever other name these devices go by, how do I know I will be getting the latest revision?
I polished both sides of the cooper plate. Make sure there is no gap between cpu and cooper plate.Other than applying new thermal paste to the copper plate, any other things I should be doing?
I tried with a 40mm noctua fan, other than noise i could not see any big differenc (maybe 1 or 2° C). with my Changwang v4 I got a 80x80x10mm fan, tuned a bit the pwm settings for silence, its about 5-10° C cooler (low rpm). You can ask changwang if they will add a fan for you.Consensus seems to be I should source my own hardware for this and potentially get the 40mm fan? Still don't know how affective it will be.
That doesn't look too bad. Input filtering seems decent, common mode choke, capacitors and probably even a MOV in the bottom part for inrush limiting. I'd have preferred to see a 400V bulk capacitor in there, at 240V mains it'll get charged to 340V dc and it's way too high for my comfort zone on a 350V cap. The output part looks nice, it would be interesting to see how much ripple gets through the inductors and caps.Well I thought the fake "Delta" PSU would be more crusty than it is. It seems reasonably well constructed and all components look new. If anything, it's overspec'd for a "4A" rating.
I'll add something besides what @Mike9474593 has already written.Hi All,
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Which shipping method did you choose for Europe? Which EU country? I noticed CWWK doesn't offer DHL - and I'm a bit nervous with AliExpress Standard Shipping . . . Did you have to pay customs as well?Get direct from Changwang, probably the best source and you can be shure you get the latest version. v5 is the latest. My v4 took about 14 days for shipping to Europe, shipping was done just the day after I orderd.
topton, king novy are all the same reseller, my personal experience with them was not the best..
Not EU but Switzerland. We have post paid taxes.Which shipping method did you choose for Europe? Which EU country? I noticed CWWK doesn't offer DHL - and I'm a bit nervous with AliExpress Standard Shipping . . . Did you have to pay customs as well?
Yep, it does have an MOV on the input. Good point about the 240V mains, definitely cutting it too close to the cap rating.That doesn't look too bad. Input filtering seems decent, common mode choke, capacitors and probably even a MOV in the bottom part for inrush limiting. I'd have preferred to see a 400V bulk capacitor in there, at 240V mains it'll get charged to 340V dc and it's way too high for my comfort zone on a 350V cap. The output part looks nice, it would be interesting to see how much ripple gets through the inductors and caps.
I'll take apart mine once I get a single psu for the whole rack, I suspect the build quality might be rather similar (same rating, similar label and different branding).
hiHi All...
I wanted to mention something I think is very easily overlooked regarding shipping of these routers.
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I am looking for the 6port variation and it doesn't seem like v5 is in that flavour I am looking for. What did they change with the 5th version?Get direct from Changwang, probably the best source and you can be shure you get the latest version. v5 is the latest. My v4 took about 14 days for shipping to Europe, shipping was done just the day after I orderd.
topton, king novy are all the same reseller, my personal experience with them was not the best...
What did you polish with? Usually with CPU's I remove paste with rubbing alcohol and apply one that does the job more efficiently.I polished both sides of the cooper plate. Make sure there is no gap between cpu and cooper plate.
Really? Noctua fans are usually really good but I guess 40mm wouldn't cut it. Would be nice if there was a method to mount a larger fan inside the chasis for better cooling but then again it would defeat the purpose of the small footprint. How do you ask Changwang to do this? Send an email?I tried with a 40mm noctua fan, other than noise i could not see any big differenc (maybe 1 or 2° C). with my Changwang v4 I got a 80x80x10mm fan, tuned a bit the pwm settings for silence, its about 5-10° C cooler (low rpm). You can ask changwang if they will add a fan for you.
Usually CPU coolers came with a good finish, but is not the case hereWhat did you polish with? Usually with CPU's I remove paste with rubbing alcohol and apply one that does the job more efficiently.
Really? Noctua fans are usually really good but I guess 40mm wouldn't cut it. Would be nice if there was a method to mount a larger fan inside the chasis for better cooling but then again it would defeat the purpose of the small footprint. How do you ask Changwang to do this? Send an email?
Also, should one be worrying about BIOS updates for something like this?