Z2 G9 minitower fan speed adjustment

[siggii]

Is there a way to get the Z2 G9 MT to adjust its fan speed in a smarter way?

I work in a completely silent office and I like the fans to be at minimum speed or off when it suits, but ramp up when I'm rendering etc.

The problem is that when I put the fan to minimum speed in the BIOS and then start rendering, it turns the case into something I can actually keep drinks warm on and it also smells like burning electronics. On the other hand when I turn the fan to something that makes the case reasonably cool when rendering (20-30), it's just incredibly noisy all the rest of the time.

I'd like the fans to blow when they have to to keep the system temps stable, but go to minimum when not needed.

[DGroves]

current cpu's (and video cards) will run fine at the temps spec'd by the cpu maker you can visit the chip makers web site for exact cpu temps for your model cpu 

second, HP is well aware of the cpu/video gpu thermal limits and take that into account when designing a system and the fans (cpu/case) will increase in speed when required so unless you have added other cards/drives to the system or are in a non air conditioned area there is no reason to play with the default fan speeds

it's normal for a system to get rather warm when causing the cpu/gpu to run at or near 100%

as long as you are in air conditioned environment it's extremely unlike the system will overheat

also note that modern cpu/gpu chips will auto downclock/throttle the speeds to prevent damage

you can buy quiet fanless systems but they are niche items and are not cheap also the fact that you want a quiet high performance "rendering" system  is sort of like wanting a hot ice cube, the two specs are not easily  compatible hence the high cost of such a system

[siggii]

You say that and it's all true in theory, but no (three month old) PC should smell like it does when you switch to a CPU intensive use like a bit (and we're not talking overnight batches, but perhaps an hour or two) with the quietest fan setting - it *is* overheating, though the CPU is doing its best to maintain performance under load / temps.

The fan *can* obviously blow a lot harder if I set the BIOS to run the fans as default at higher speeds at the cost my much higher noise when idle, so my question is simply why can't I set it as quiet as default, and the fans ramp up before the case turns into a furnace?  My Macs do this for example (a little too much), and even most DIY's I've had are capable of this. On the Z2 the delta between idle and load appears to be very little, if anything at all.

[SDH]

Do you have the dual front case cooling fans option in your HP Z2 G9 TWR (it is not a "mini-tower")? Not all of them came with that installed. Attached below is the latest QuickSpecs PDF from HP for that desktop PC, and search the PDF for the Option Part Number 4N007AA. That kit costs about 30.00 USD. Below are two pics of what it looks like. It is installed horizontally up front as you can see, and I'd add one of those in all circumstances if the box did not come with that in the first place:

What you want if you don't have it...Where it fits...

I always plan for adding case cooling if I'm building up for a high-intensity use workstation. There also are blowers you can plug into a rear unused PCIe slot to help with case cooling.  You also can buy aftermarket perforated PCIe slot cover plates to replace your solid ones, to allow easier egress of hot air through the case. Smaller is not always better in terms of case cooling...

(PDF attached)

[siggii]

Yes they're fitted. I was a bit surprised when the PC was delivered as I expected to see a single 120mm in the space, not two smaller fans which would provide debatable extra airflow and also be noisier - as I found out.

And again, my question isn't why there aren't more fans in the case - it's why they don't spin up when needed to a greater delta if I set the BIOS fan speed initially low.

I'm OK with the idle system noise with the BIOS fan setting at minimum or one click above. What I actually have to do to not be able to keep my coffee hot on the case while doing anything remotely strenuous however is to run the fans three clicks away from minimum, which makes the system very hard to live with at idle.