[smachiz]

depends how fasts it is moving - but it's all moving at the same speed. The last chip will get less cooling than the first chip, proportional to the amount of cooling the previous chips received. Delta T doesn't lie.

Whether it's significant or not, I can't know - but you want it to be significant, otherwise it's less efficient.

[0x457]

It moves fast enough that the temperature delta between first and last chip isn't significant. Not too fast, though, because if the pump is running full-tilt it becomes a major heat-source itself.

> but you want it to be significant, otherwise it's less efficient.

No? You want a large delta between heat-source and water, as well as water and whatever is on your cool side. Essentially just between hot and cold sides.

Delta between heat-sources is irrelevant unless you start cherry-picking some very odd combinations.

[Dylan16807]

> depends how fasts it is moving - but it's all moving at the same speed. The last chip will get less cooling than the first chip, proportional to the amount of cooling the previous chips received. Delta T doesn't lie.

The watts of cooling per chip will be the same. The last chip in the loop will be a little warmer, but not by much in a reasonable setup. The difference in temperature between each chip and the water running across it will be the same.

And if you take a weak water supply and then split it to run in parallel, you can end up with a significant heat gradient across each waterblock which doesn't sound great either. If you have 4 high power chips please don't limit them to .25 liters per minute each.

> Whether it's significant or not, I can't know - but you want it to be significant, otherwise it's less efficient.

Keeping your fluid cool is good for long term reliability. And if you're doing that, then every block is getting cool fluid and the other details about loop layout won't matter.