Throughout the tests and benchmarks, we encountered no stability issues
despite having no fans cooling the card in an open air environment.
ASUS has done a great job in the thermal management on the N6600GT Silencer.

However, the impressive cooling solution does have some cons. Due to it’s massive size for the heatsinks, running 2 cards in SLi mode
becomes as quite a challenge on all boards except on ASUS motherboards. Although
ASUS has stated that the fins can be tilted but it is actually pretty rigid.

This is
due to the size of the protruding copper fin portion. In the tests, we managed
to push both cards together, and fit the SLi connector. However, this can only
be done in a setup without a casing. A case setup would not allow the SLi
connector to be fitted on, without the PCI brackets getting into the way.

ASUS 6600GT silencer16 ASUS Extreme N6600GT Silencer

From the top view, it is clear that the copper portion of the
card, will get into the way with the usage of 2 cards in SLi operation.

ASUS 6600GT silencer19 ASUS Extreme N6600GT Silencer

From another view, this is how the cards look like when
placed together. While this picture is taken without the SLi bridge connected,
one of the cards is clearly slanted due to the copper portion of the heatsink in
place.

ASUS 6600GT silencer20 ASUS Extreme N6600GT Silencer

However, in an open air environment, we were still able to
operate the 2 cards in SLi mode. With a hard push together, the SLi bridge could
still be connected. But however, if users wanted to have 2 of such cards plugged
in a case, you’re out of luck.

Test Setup Configuration:

  • AMD Athlon 64 3800+ (2.4GHz, Newcastle core)

  • Gigabyte K8NXP-SLi Motherboard

  • 2x 512MB PDP Patriot 3200XBLK+ (Samsung K4H560838F-TCCD) @
    2-2-2-5 timings

  • 2x ASUS N6600GT Silencer 256MB*

  • Leadtek Winfast PX 6600GT 128MB

  • Seagate 7200.7 40GB PATA Hard Drive

  • Coolermaster RealPower 550W PSU

* Results of both SLi and Single card are being labeled in
performance charts.

Benchmark Used:

  • Futuremark 3DMark 2001SE (Version 3.30)

  • Futuremark 3DMark 03 (Version 3.60)

  • Futuremark 3DMark 05 (Version 1.20)

  • Counter-Strike: Source Video Stress Test @ 1024 x 768 High
    Quality

  • Doom III Time Demo @ 1024 x 768 Mid Quality

  • Unreal Tournament 2004 (Via UMark) @ 1024 x 768 Default
    Quality