How much heat does the X1950GT generate?

I was wondering if the Accelero S1 would be able to cool an X1950XT 256MB, with a fan of course.

I'm trying to use the results of the X-bit labs comparisons to make a decision for cooling my new 7900GS. I'm having difficulty reconciling two of your results, though. Looking at the Zalman VF900-Cu LED in this comparison yields very different results than the VF900-Cu did in the CoolViva Pro comparison (http://www.xbitlabs.com/articles/coolers/display/coolermast er-coolviva-pro_5.html). At a slower fan speed, running the same test, the VF900 in this comparison was a full 7-8 degrees cooler at idle than in the CoolViva Pro comparison. At full load, the difference is staggering: 22-30 degrees lower! Based on these differences, I'm having a very hard time determining whether the VF900, CoolViva Pro, Accelero S1 with a fan, or CoolViva Z1 is the right cooler for me. Any clarification as to the source of the temperature differences would be much appreciated.

For HIS X1950 Pro Platinum 512mb 256 bit what cooler do I have to buy?

For my HIS x1950 Pro Platiunium card with 512 mb 256 bit temps are:
idle :38
100% : 48
-with an Antec 120 mm fan