Subject: Processors | September 13, 2011 - 09:03 AM | Ryan Shrout
Tagged: video, overclocking, FX, bulldozer, amd
There is a sub-culture in the computing world that is more or less analogous to the world of NHRA drag racing: liquid nitrogen overclocking. And if you are really serious, liquid helium. During a press event in Austin, TX in August to discuss the upcoming Bulldozer processor, a team of overclockers pushed the new architecture to frequencies well beyond safety and well beyond where they should be. Without giving away the whole story yet, AMD was able to set a new frequency world record...
Sami Mäkinen and his team hit 8.429GHz on liquid nitrogen and liquid helium with a near-production FX processor sample. This bests the reigning record of 8.308 GHz that was hit on a Celeron processor with LN2.
On August 31, an AMD FX processor achieved a frequency of 8.429GHz, a stunning result for a modern, multi-core processor. The record was achieved with several days of preparation and an amazing and inspired run in front of world renowned technology press in Austin, Texas. This frequency bests the prior record of 8.309GHz, and completely blows away any modern desktop processor. Based on our overclocking tests, the AMD FX CPU is a clock eating monster, temporarily able to withstand extreme conditions to achieve amazing speed. Even with more conservative methods, the AMD FX processors, with multiplier unlocked throughout the range, appear to scale with cold. We achieved clock frequencies well above 5GHz using only air or sub-$100 water cooling solutions.
I was in attendance for the event and have to say that group put on a spectacular show and anytime you can play with liquid helium running at near absolute zero temperature, it's worth paying attention! In fact, I put together a video of the event that you can see below and if you haven't participated or seen something of this nature, it is worth checking out!!
Now I need to temper some dreams right now - the chances of you or I reaching these types of clock speeds on the Bulldozer CPUs upon release are pretty close to nil. What was more interesting was the casual overclocking we saw pushing upwards of 4.8+ GHz without breaking a sweat and that is what we will be investigating with our review of the processor later this year.
Update: Here is the screenshot from the official HWBot frequency rankings as well as a different video created by AMD themselves summarizing the event.
Subject: Cases and Cooling, Processors | August 13, 2011 - 02:53 AM | Tim Verry
Tagged: amd, FX, octocore, water cooling, sealed loop, LCS, hsf
According to Xbit Labs, AMD is considering switching out the usual air cooler (HSF) for a sealed loop liquid cooling solution (LCS) for its high end FX Processors. Specifically, AMD wants to pair their highest end eight core processor (and possibly the next highest end eight core chip) with the sealed loop liquid cooling solution. This information, they believe, comes from a “source with knowledge of the company’s plans.”
If you are not familiar with the sealed loop water coolers, PC Perspective reviewed the Corsair H70 processor cooler last year and it is a good example. Sealed loop water coolers are similar to the large DIY water cooling loops comprised of a large radiator, copper CPU block, pump, and reservoir all connected in a loop by tubing; however, they usually have smaller radiators and pumps as well as coolant that cannot be refilled (and should not have to be). This coolant carries heat away from the processor to be dissipated through a radiator. Corsair in particular has heavily invested in this once very niche product with it’s H series of coolers.
Traditionally, both Intel and AMD have been content in pairing their chips with mid-range but cheap air coolers that did a decent job of keeping the processors within their thermal limits at stock speeds. Enthusiasts, and especially those interested in overclocking, have generally ditched the included cooler in favor of a more powerful and/or quieter aftermarket cooler. Needless to say, including a cooler, especially with high end chips that will likely go to enthusiasts, that’s never even used only serves to add additional unnecessary cost for both consumers and the manufacturer. Thus, this move to bundle a more powerful sealed loop water cooler with its high end chips may be an attempt by AMD to futher appeal to enthusiasts and keep with their traditional image of being friendly to overclockers and hardware enthusiasts. Having and using a water cooler that is supported by the chip maker certainly doesn’t hurt, especially if it ever came down to warranty and RMA situations. On the other hand, enthusiasts can be very picky about which cooler to use in their systems; therefore, bundling a cooler that is sure to add even more extra cost to the package may not be the right move for AMD. At best, consumers are likely to see an extra $50 or so added to the sure to be pricey highest end eight core chips.
Their idea, if true, surely has merit, but is it wise? Let us know your thoughts in the comments below!
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