SUMMARY: Very good choice for GPU cooling.

The good guys at Swiftech were nice enough to send an MCW50 GPU Waterblock to test.

Swiftech MCW50 features

• Push fittings for 1/2" OD tubing
• Pin fin copper base
• Mounting hardware for a wide range of GPUs, such as ATI® Radeon™ 9000 to 9800 and NVidia® GForce™ products
• Designed to be used either in straight liquid cooling configuration or in conjunction with a thermoelectric (Peltier) cooling element

Very flat - do not try lapping this as you will only make it worse.

Parts shipped with the MCW50 should be sufficient for just about any situation:

Overall, very good build quality.

The Swiftech MCW50 was tested using the CPU Die Simulator and Waterblock Test Rig.

Test Results indicate that the Swiftech MCW50's pressure drop (or head loss) across the waterblock is very low; resistance such as this means that Swiftech MCW50 will perform nicely with moderate power waterpumps, especially if other components in the system are not overly restrictive.

I found that performance degraded by about 0.7ºC with at a flow rate of 0.5 gpm and improved by about 0.6ºC at 1.5 gpm - very "even" results.

For a comparison of the Swiftech MCW50's performance to other waterblocks tested to date, see Overclockers.com Waterblock Test Results.

Swiftech's MCW50 Waterblock is a fine choice for GPU cooling. As GPU waterblocks are usually fitted in series with a CPU waterblock, low flow resistance is particularly important for a GPU waterblock. Note that this waterblock is 1.22" high, so plan accordingly.

Thanks again to Swiftech for sending this our way. The MCW50 is available from the Heatsink Factory.