DavidNJ

Post vga blocks look like a flat copper plate with water flowing over it. This one looks more like a CPU block:





In Martin's tests it is very restrictive, as you would expect with the bends on the inlet flow. However, it looks like it may work well.

Does anyone have hands on experience?

Martinm210

I'm still running mine.

It's a really restrictive block, but on a GPU only loop it's the best thermally performing block I've tried.

I'm happy with it, and have been running mine for a while now.

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Flow Rate Estimator | Radiator Sizing Estimators

DavidNJ

It looked like the only video block that actually was designed like a chip cooler, rather than water of a copper heatsink.

Your spreadsheet shows about 1.13 gal/min for my current setup (Apogee Drive, MCP220). While you don't have the exact radiator for my new setup (Fuzion, GFX, Viper John NB, XSPC Restop, GTX480), with the most restrictive radiator on your list it shows 1.31 gal/min. With the nearly all the others the rates are between 1.4 and 1.45, not much of a spread. A stock DDC 3.2 would match the current configuration.

Question: can you run two reservoir tops in series? Or is it better if the second pump is a regular top inlet?

Thanks for your spreadsheet,

David

Martinm210

I'd probably run the second top with a regular top. It seems MadeInBrazil was having issues with a dual reservoir setup. I've had problems with my test setup with dual reservoirs too.

I havn't posted my results yet, but when I retested all the DDC tops, the regular XSPC top is now much closer to the XSPC reservoir top. Apparently there is quite a bit of loss in the suction line that artificially gives the reservoir tops a bit more advantage than they really have.

The GTS curve will get you close to the 480GTX. Still working on getting my thermal testing in order to complete that one.

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Flow Rate Estimator | Radiator Sizing Estimators

DavidNJ

Figured the GTS or three BIX360s.

What suction line loss? I would have thought it was a capacitance issue. The second pump wouldn't have had the capacitance issue, since it feed would have been under pressure. And the capacitance of the reservoir may have induced an oscillation with the out put of the first pump. I would imagine that is more like with the larger diameter lines.

Martinm210

I think there is more pressure drop across the inlet and outlet of a normal pump than there is a reservoir pump. I had plenty of positive static pressure from the loop and test, so it's just a matter of pressure drop of the suction line between the test reservoir and the pump. It's not a whole bunch, but a little error. Now that I'm testing both sides of the pump, it eliminates that little bit of error is all. Total head is the outlet - inlet, where before I was just measuring the outlet only.

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Flow Rate Estimator | Radiator Sizing Estimators

roningai

i have that block too not too bad, i know it's restrictive but i have running on my loop so far i'm at 3.6 w/ my quad i haven't OCed my gpu on it yet. i may need to add another loop if i do that. i'm also using the dtek HS w/ it.

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