Linked by Thom Holwerda on Tue 20th Nov 2007 16:46 UTC, submitted by Luis
AMD AnandTech takes a look at AMD's new Phenom. "If you were looking for a changing of the guard today it's just not going to happen. Phenom is, clock for clock, slower than Core 2 and the chips aren't yet yielding well enough to boost clock speeds above what Intel is capable of. While AMD just introduced its first 2.2GHz and 2.3GHz quad-core CPUs today, Intel previewed its first 3.2GHz quad-core chips. We were expecting Intel to retain the high end performance crown, but also expected AMD to chip away at the lower end of the quad-core market - today's launch confirms that Intel is still the king of the quad-core market."
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Multiple problems
by Nicholas Blachford on Tue 20th Nov 2007 22:40 UTC
Nicholas Blachford
Member since:

AMD has a number of problems with Phenom, the biggest of course being the bugs which are keeping the clock speed right down. Unfortunately these months to fix.

The second problem is Intel have got 45nm with high K much sooner than tAMD. Being a process node ahead isn't that much of a performance leap these days but high K makes a *huge* difference.

Even if they fix the bugs Intel can just up their cock speed and stay ahead. AMD wont be able to respond until they have the same tech, and that could be some time away.

The other problems are more subtle - Intel, despite being dual core are still designing processors for fast single threaded performance. AMD's is clearly more designed for multithreaded performance. Single threaded software is much more common on desktops and thus can't take advantage of AMD's design.

Once AMD have the bugs ironed out and have 45nm tech and especially high K they'll be able to compete, If (and that's a big If) by then there's more properly multithreaded software around it'll show. - assuming AMD still exists by then.

The current tests appear to be on embarrassingly parallel tasks - tasks which won't stretch inter-core communications they completely ignore Barcelona's major advantage.

I suspect Barcelona will do rather better in multi-socket server benchmarks, their interconnect will be properly tested there. They were already in the lead there and Barcelona, even with it's problems should increase the lead.

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