Watercooling loop help

[Lt Cmdr Ambrose]

Ok so I just finished my first custom loop build a little while back, and got roasted on R/Watercooling lol 
I got this 6900 XT STRIX LC with a EK Waterblock already installed in a Razer Core X Chroma for 575$ on ebay. It was running in that config with a 120mm rad just fine, and the previous owner tossed the original cooler 

So I decided to build a tower with a 7700x and do a soft tubing loop with a 240mm rad. Being that I am a moron and didn't ask for help or think it through (forgot the drain port and temp sensor too), I thought  240 mm would be fine for this. 120 MM per part is what I was told for years, but everyone said my water temps are probably running too hot. 
I played halo infinite and back 4 blood for about 2 hours straight and my gpu hit 46 C and cpu got up to 47C, which seems like it would be cool enough (I.E. Coolant temps should be lower than the 50C danger zone?). I keep my apartment at around 69F (nice)/ 20c, and both the gpu and CPU are undervolted. 

Am I wrong on this? Do I need to add another radiator? What is the delta between water temp and part temp usually? 

Thanks in advance for any help! 
 

[RONOTHAN##]

5 minutes ago, Lt Cmdr Ambrose said:

120 MM per part is what I was told for years

That was also before GPUs and CPUs started consuming over 300W individually. 

 

I'd personally want another radiator, both of those are relatively hot components, but your temps do look fine enough since you're undervolted. I'd argue that undervolting (at least on a 6900 XT) doesn't really make sense though if you're going to be doing a custom loop, where the biggest advantage is extra thermal headroom to push clocks higher and higher. 

[Zando_]

Sounds like you ran into morons. If you don't need the thermal headroom, more rad surface area is useless. Your temps seem fine, if you decide to stop undervolting and they get too toasty for your liking, then consider adding another radiator (I would put a 360mm in the front, and move the 240 you already have to the top, assuming your case can support that configuration). 

 

1 hour ago, Lt Cmdr Ambrose said:

What is the delta between water temp and part temp usually? 

You would need a coolant temp sensor to know that, I think it depends on individual setup. For my EVGA CLC 280 (an AIO) my CPU can hit the high 80s and coolant temp will sit at 36-39C, so less than half. I haven't been able to get my loop up and running properly yet (thus the AIO), when I do so I plan to have a coolant temp sensor for just that reason, want to see how the delta is. 

[Lt Cmdr Ambrose]

Thanks for the replies! 
I will upgrade down the line, but I think for now it will be fine. I am getting too old to have marathon gaming sessions that would actually saturate the cooler anyways lol

[Mick Naughty]

I prefer 140mm fans. I do a 280 rad per device at minimum. Obviously, the case dictates most of that. I even do it with old hardware, 8700k and a 1080ti. 
More is always better if you actually want better temps overall than on air and less noise. Or else its just for looks.