While it's true that clock speed tells you less than it used to about how well a particular chip will perform, this new scheme will likely confuse buyers more than it helps. Here's Intel's justification for it: According to Intel VP Anand Chandrasekher, speaking at the launch of the Dothan (a.k.a. 700 series) CPU, the new numbers are not about performance so much as "goodness."
When I buy a car, I don't want to know how good the manufacturer thinks the engine is. I want to know how powerful it is--how much horsepower it has. Even BMW's cryptic naming scheme makes more sense than Intel's new plan, because the last two digits in most BMW model numbers indicate engine displacement in (a BMW 325 has a 2.5-litre engine), which is a pretty good indication of how much oomph the car has. By comparison, an Intel-series 745 chip runs at 1.8GHz. Do you see the correlation? Me neither. Because there isn't one.
Of course, with car engines, we care about linear things -- horsepower and torque. With CPUs, we care about performance when playing games and performance when processing videos, and top-of-the-heap performance in one doesn't necessarily mean best-of-class in the other. But even so, fast is fast. What Intel is doing with its new scheme is taking into account other factors that have nothing to do with speed. For example, Chandrasekher says the new scheme takes into account power draw (and thus battery life).
This is a good thing to know, but it's like BMW naming its cars based on fuel economy.
Intel's new scheme also considers things such as cache size and bus speed, which do affect performance. And Intel has to do this. The problem, if it can be called that, is that the new Pentium M chips run faster than older Pentium Ms with the same, or even faster, clock speeds. So Intel needs to attach bigger numbers to the new parts to telegraph to consumers that they are faster.
This scheme also appears to be a shot at AMD, Intel's chief competitor. AMD's chip-naming scheme is grounded in its competition with Intel. For example, an AMD Athlon 64 3200 is sold as a direct competitor to an Intel Pentium 4 running at 3.2GHz -- even though the AMD's internal clock speed is 2.2GHz. With Intel's new series-based naming scheme, AMD will have to figure out some new way to compete.
Ultimately, just as engine displacement really doesn't equal horsepower (some engines wring more power out of less, and the number of cylinders and turbochargers and things like that throw off any displacement rating), because of the large impact of things such as the size of a processor's cache, CPU processor speed is meaning less and less in terms of performance. And Intel is working on dual-core processors, which will essentially (in theory) double performance at a given clock speed.
So what we need is an agreed-upon measure of processor performance. It doesn't have to be exact. Car engines are rated in horsepower, a performance measure the public understands, even though a car's overall performance will vary depending on a car's total weight and many other factors. Chips can be benchmarked on simple or complex tasks--from a raw number such as MIPS (millions of instructions per second) to something more real world, such as the BAPco SysMark tests we run on desktops and laptops.
I'd like to see the chip companies adopt a performance number from such a standardised test. It won't tell you precisely how well a chip will perform, but it will put you in the ballpark, just like a horsepower rating does. And it'd be a lot easier to decipher than an arbitrary number that seems destined to confuse buyers more than help them understand what it represents.
For more information on how these chips really perform, see our Tech Guide on Intel's new Pentium M processor.
What do you think? Is Intel's new naming scheme helpful to you? Or is it confusing? TalkBack to me below!