How Many Radiators?

[darkxmen]

I am switching to 140 rads and fans And was wondering if a single 420 would be enough to cool a 5820K with a mild 4.2-4.3 OC and a single Gtx 1080 GPU. ? or will i need to add a 280 also to the mix.

 

[Warchild]

I think 280 would be the comfortable bet. But it can depend on what radiator, what fins are used, what fans are used etc.

Without any of that info I would still suggest 280.

 

[eXile6]

I am switching to 140 rads and fans And was wondering if a single 420 would be enough to cool a 5820K with a mild 4.2-4.3 OC and a single Gtx 1080 GPU. ? or will i need to add a 280 also to the mix.

Yeah it should be more than enough.

I am going for 2x 420s for a single cpu and gpu loop, it is way overkill but I want silence so it's the only way to keep fans at really low rpms and still have nice cooling.

 

[darkxmen]

I think 280 would be the comfortable bet. But it can depend on what radiator, what fins are used, what fans are used etc.

Without any of that info I would still suggest 280.

Hardware Labs Black Ice SR2 Multiport Black Carbon Radiator - 420mm, 9 FPI 45 Micron Copper Fins

 

[darkxmen]

Yeah it should be more than enough.

I am going for 2x 420s for a single cpu and gpu loop, it is way overkill but I want silence so it's the only way to keep fans at really low rpms and still have nice cooling.

so if I add the 280 i could run the fans around 800-900 keeping it cool and silent at the same time?

 

[nass]

For quiet, more rads and low speed fans the better, I run two quad rads on a 1080 and cpu with a 4.6-4.7 oc on cpu, 2100 on vid, fans around 800 rpm in push on my rads.

So basically the more surface area u have for cooling the lower speed u can run your fans and also keep your oc and quiet. Below 1000rpm find them hard to hear or notice really, gaming changes nothing on the sound idea.

 

[darkxmen]

For quiet, more rads and low speed fans the better, I run two quad rads on a 1080 and cpu with a 4.6-4.7 oc on cpu, 2100 on vid, fans around 800 rpm in push on my rads.

So basically the more surface area u have for cooling the lower speed u can run your fans and also keep your oc and quiet. Below 1000rpm find them hard to hear or notice really, gaming changes nothing on the sound idea.

thx for the info helps a lot

 

[guskline]

The answer is sure. A single 420 is "enough". There are a number of factors to look at. First you need to calculate, as closely as possible the number of watts you produce at max OC for cpu and gpu. Since the GTX 1080 is a single 8 pin I think it's a safe bet that the thermals don't exceed 250W. For the 5820 at 4.3 I doubt it produces more than 200W max (my 5960x at 4.4 vcore 1.35 is at max 240W) so your total into the loop is @450W. If you use a D5 pump as I do add at most 15W since the loop cools it.

At max OC your 420 will probably keep up with the heat but fans will need to be at max.

I LOVE rads and have 3 RX480s in my 5960x@ 4.4 and single GTX 1080 loop. I have 2 D5s in series. My delta even maxed never exceeds 7 degrees over ambient temp.

If you also have a 280 rad it will add a cushion and allow you to run slower fan speeds.