Alphacool NVXP-G8 waterblock

Performance

Performance

You can see from the graph below that there is quite a considerable pressure drop for both GPU blocks. However, the Alphacool NVXP-G8 takes first place over the EK FC8800GTS, simply because it facilitates the least amount of 'head' loss.

Head pressure comparison

The Alphacool NVXP-G8 proved to be the most restrictive block of the two tested, with the EK FC8800GTS allowing 100 litres/ hour of flow more than the Alphacool. It will be interesting to see how much of an effect the reduced flow has on the actual cooling performance of the water block. The graphs at the bottom of the page best reflect this.

Flow comparison

I was quite impressed with the cooling performance of the Alphacool NVXP-G8. However, the EK FC8800GTS managed to provide a slightly better overall cooling capacity at load, and when overclocked.

My ASUS EN8800GTS graphics card is not a bad overclocker, and both water blocks managed to get the core clock up to 663Mhz from the default of 513Mhz. Which is an increase in core clock of around 29%.  Overclocking the memory on the card proved a little better too with the Alphacool NVXP-G8 managing to get the memory to 983Mhz, and the EK FC8800GTS to 1020Mhz, respectively.

Alphacool performance chart

Ambient Temperature - 24.3 degC

(Water Temperature)
IdleLoadOverclocked
30.8 DegC31.4 DegC32.9 DegC

 
EK cooling performance

Ambient Temperature - 24.6 DegC

(Water Temperature)

IdleLoadOverclocked
31.4 DegC32.3 DegC 33.5 DegC

All things considered the Alphacool NVXP-G8 provides solid cooling performance. Let's head over the page to see how it performed as a whole...
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Most Recent Comments

14-11-2007, 21:47:17

PV5150
Today we take the Alphacool NVXP-G8 full-cover block for a bout of friendly, water-cooled frolicking against EK's best.

http://www.overclock3d.net/gfx/artic...064432945s.jpg

Let the games begin

16-11-2007, 03:20:38

Nagaru
Great review mate, I sadly can think of many improvments they could make to the design.

16-11-2007, 06:03:46

Mr. Smith
Sound methodology and a balanced conclusion.

I'd take the EK over the alpha due to ability to change barb direction... That and it performs better lol

16-11-2007, 06:15:48

PV5150
Thanks guys for the feedback, it's very much appreciated as it allows me to refine the process. Is there anything else that you would like to see done in future reviews that I haven't included?
Reply
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