I have a Swiftech MCP655-B pump and I'm wondering if it can handle 1 cpu block and 4 gpu blocks running through 1 rad?
 
Thanks!

It's a Laing D5 pump, which Swiftech has just put their name on. People have the Laing D5 pump under several different manufacture names and was hoping I could get some real world experience from members here.

Alright, that's good info. I'm using 1/2" ID tubing.
 
Not using a pump top, but my pump is mounted directly to a XSPC D5 Dual Bay Reservoir V2.
 
I am thinking about using these Bitspower Aqua Link fittings in a serial setup for the video cards, so that would be 3 of them. I don't see any specs for the ID, but they look a bit smaller on the ID then 1/2" to me.
 
The video card block are the EVGA 400-HC-5599-B1 blocks, 4 of them.
 
The cpu block is a Swiftech Apogee HD block.
 
The rad is the XSPC EX360 Crossflow Radiator V2.
 
I don't see a flow or pressure issue with this combination, but I don't see a btu capacity on the rad?
 
 

Your "pump top" is built into the reservoir housing
 
Serial is more restrictive as it increases per GPU block
 
 
If your planning on OC your Rig one 360 Rad will Not get the job done
 
Rule of thumb for 35 - 45 mm thick radiator 1 section of 120mm per block plus 1 additional
 
So with 5 blocks (4 GPU & 1 CPU) you should look for a bigger radiator or additional radiators
 
Moving to 140mm size will increase area and cooling, if it will fit in your case
 
120mm X 360mm = 43200 sq mm of area
 
140mm X 420mm = 58800 sq mm of area
 
Fins per inch, thickness, size and material all play into heat dissipation; along with fans and pump flow rate
 
Watts to BTU per hour conversion
 
1 Watt = 3.412141 BTUs per Hour
 
 
TDP & Calculating Delta-T (scroll down the page)
 
 
Radiator Size Estimator XSPC EX 360 Radiator Review
 
 
Radiator Review Round Up 2016 
 
Review these:  
MartinsLiquidLab/index.html
 
MartinsLiquidLab/XSPC-RS360-Radiator-Review.html
 
 
 Radiator Thermals and Radiator Calculators by Martin
 
Water Cooling Radiator Comparison: Thickness vs Fin Density
 
[Bundymania User Review] Triple Radiator (360) Roundup with 22 Rads !
 
 
 not sure the overclock.net links are working once you land on the first page (my link) the calculator link seem to send one to a generic page, not sure why

I like the D5 pumps for longevity, quite operation, and for me no leaks in 7 years or so. Here is my loop for you to compare: Two D5's in an EK dual mount with reservoir - 420 rad 60mm thick - cpu 1 - cpu 2 - full mobo water block - gpu water block 1 - gpu water block 2 - 280 rad also 60mm thick linked with 1/2" ID hose. One pump was enough but I added the second one just to make the loop flow effortlessly and for redundancy in case one pump breaks. This system was originally built for GTX 580 4 way sli.
 
You should be ok with what you have. If you want to build it once then I would add another 240 rad and add the second pump if you can.  Let us know how it turned out.