Today, we'll be covering the performance of 11 different vendor's versions of the Geforce 6600GT. When that many of the same part get into the same room at the same time, you know that we're going to have a good cross-section of what the market should look like. If you're interested in buying a 6600GT, then this is the article for you.

Not only will we see what all these different vendors have to offer to you as a customer, but we will really see how hard the NV43 can be pushed, pulled, and stretched when it hits your system. We don't usually like to test overclocking on a large scale with the engineering sample parts that NVIDIA and ATI send us just after a product launch. These test samples are often just strung together by the skin of their IHV's proverbial teeth. It's not uncommon to see wires, resistors, and capacitors soldered onto an early PCB. We're actually lucky that these things work at all in some cases. We received an overclocked 6800 Ultra Extreme from NVIDIA that never booted, as well as an NV41 that was DOA. These preproduction boards are not the kind of boards that we would actually buy and use in our home systems.

And so, when an incredible number of vendors responded to our call for parts, we were very happy. Shipping parts means that we have what the end user will have. Heat tests, noise tests, overclocking tests - they all become very relevant and interesting. We will be looking at which vendors offer the best products to the consumer. Cards will be judged based on their idle and load thermal diode temperatures, the sound pressure level in dB of the system at a one meter distance, overclockability, features, bundle, and price.

We do spend a lot of time looking at the benchmarks of these cards at overclocked speeds, but these benchmarks aren't the "be all, end all" judge of what vendor makes a better card. First of all, the potential of any given ASIC to achieve a certain overclock is not something over which a vendor can have any power, unless they bin their chips and sell a special line of overclocker friendly cards (or, more likely, pre-overclocked cards). None of these 6600GTs fall into that category. This means that our BrandX card running at a certain speed doesn't guarantee anything about yours.

Overclocking tests are still important, as they assure that the cards which do achieve a high stable clock are able to support a GPU that is capable of running at a high speed. Some boards are not. It's just more of an art than a science sometimes and these numbers shouldn't be used as an absolute metric.

Heat management is especially important when overclocking. With a new breed of game on store shelves, such as Doom 3, Half-Life 2, and the onslaught of titles that will surely be based on their engines, GPU temperatures have no where to go but up. Increasing the core clock speed will help performance, but in our tests, it also raised maximum load temperature by a degree or two. The more a graphics card maker can do to keep heat down, the better. And that will be especially tricky with these cards once they've been in end users' hands for a while. Allow me to explain.

The way that the cooling solution attaches to NVIDIA's reference design is with 2 holes. Basically, the popular rectangular heatsink design is positioned precariously on top of the GPU and can pivot easily around the ASIC. This means: don't touch the heatsink. This really causes problems in situations where the thermal tape or glue is used. The kind of fulcrum that the NVIDIA reference design created is beyond powerful enough to tear through tape and snap the strongest glue without a second thought. Once those seals have been broken, cooling is severely compromised. Looking back at our numbers, this may be the reason why we see some of the extreme temperature numbers that we do. Of course, we were extraordinarily careful to avoid touching any HSFs after we realized what was going on.

Overclocking our Geforce 6600GTs
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  • geogecko - Friday, December 10, 2004 - link

    #33. I agree completely. That's why I'm curious about the HDTV output. I want to build an HTPC that is somewhat future-proof, and if that is the case, then I need the HDTV Out feature to work. From a review on's web site on the XFX card, he couldn't seem to get and HDTV Out to work with the card.

    NVDVD would also be a plus if it was included, but I doubt it. I sent an e-mail to tech support over at XFX, asking these particular questions. Hopefully, I'll get an answer.
  • jamawass - Friday, December 10, 2004 - link

    Well there's more to a graphics card than gaming. The 6600 series is causing quite a stir in the htpc community because of the video decoding capabilites and hdtv output. It would've been helpful if the reviewer had mentioned the various manufacturers' suppport for HDTV output out of the box, which cards come with the NDVD codec, component adapter etc.
  • bigpow - Friday, December 10, 2004 - link

    -> hex value 3 = decimal value 3
  • geogecko - Friday, December 10, 2004 - link

    Great article Derek. Been looking for a 6600GT round up article for a while now.

    Question though. A few of these cards come with an HDTV cable, which, I guess I'm a little confused to what this actually is. I prefer the XFX card, because of the dual DVI outputs (and no need to overclock the card). It doesn't list as coming with an HDTV cable, so I'm wondering, what is the impact on not having this cable? What is the cable? Can't one usually just hook up a DVI cable to an HDTV?
  • Spacecomber - Friday, December 10, 2004 - link

    Nice round-up, and your bringing attention to the potential problems with some of the heatsinks is very much appreciated.

    Maybe as a follow up we need a round-up of some after-market heatsinks for the 6600GT.

    Any reason to assume that these conclusions reached for the PCIe cards do or do not apply to the AGP versions? I know the AGP versions typically have their heatsinks set on a diagonal in order to accomodate the bridge chip.

  • arswihart - Friday, December 10, 2004 - link

    my last comment was in response to #25

    #27 - Derek is talking about his "IT friendly" list, those cards he felt had the most reliable hsf implementation

  • arswihart - Friday, December 10, 2004 - link

    it does consistently lead in performance, worth noting by all means, but also, as it was mentioned in the review, these cards probably all perform even better on an nforce4, and the rank and file in performance among these cards might be a little different on an nforce4

    but I would definitely get an arctic cooler for the albatron anyways (if a compatible one is released) to quiet it down, that fan on it is tiny, thin, and loud
  • Houdani - Friday, December 10, 2004 - link

    On the last page [Final Words] you are listing why some cards aren't worthy of an Editor's Choice award. The next to last paragraph states:

    "XFX doesn't make the list because..."

    But, ummm, isn't XFX the Silver choice?
  • Aquila76 - Friday, December 10, 2004 - link

    I know the Albatron didn't have a great mounting mechanism, but it was better than many of the others
  • Aquila76 - Friday, December 10, 2004 - link

    Why wasn't the Albatron given any medal? It has the best OC, best or near best performance in all the tests, and great temps even under load with the high OC. So the fan is a little noisier than the rest, is that any reason to dirt on this card?

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