I run chilled water through a homemade water block. My ambient room temps vary from 70 (winter) to 83 (summer). My water temps vary from 18.5~21, depending on ambient air....cpu load.....and when during the measuring cycle I grab the data.
My cpu to water temps generally show the cpu operating at about 10 degrees above water temp. If I really pull the water down to 12 degrees, start the computer (so that everything else is nice a cool) and measure the temps I can see the cpu at only 5 degrees above water temp.
This is a long winded way of saying that 1 degree above ambient isn't very realistic.
My techcool unit is cooling off my pelts. Right at this moment I have 29.5 cpu, water 18.5 (chilled), water 34.7 (heated from pelts) going to techcool unit, water 32.3 (cooled) coming from techcool unit, ambient room temp 29.
wj
my chiller
my chiller's cooler