First these are good temps (i suppose you swapped the 'stressed' and 'idle'
). I know lots of ppl who run at more than 50°C with such setups. (whatever those temps mean)
Your setup seems good. No worry.
Just a few points where you can improve things:
- try to run the pump inline as it heats the water it's in
- try to put an airtrap / fill tube above the level of your rad. Bubbles may be trapped in your rad (you won't see them pass through, since they are trapped...)
Basically that's it. 33°C with straight watercooling ain't bad at all.
Have fun !