AtenRa
Lifer
- Feb 2, 2009
- 14,003
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You do recognize that these "fair comparisons" you are seeking are artificial constructs, right?
Sans clockspeeds, sans price, sans power-consumption...what are you attempting to compare? Normalized by die-size? OK, I see utility in such an artificial construct for microarchitectural efficiency analyses but not I don't see much utility in it beyond that.
What do you think AMD intends the 4170 to compete against? 990X? SB-E? i3-2100?
Compering a smaller (Fewer transistors) processor against a bigger (More transistors), I believe anyone agree is not fair (performance wise) and will make you come to wrong conclusions about IPC, power Usage, performance/w and more.
To give you an example, let’s compere Intel Core i3 against Core i5. Both CPUs are of the same architecture but, Core i3 has two cores + HT when Core i5 has 4 cores no HT.
It will take a nice OverClock of the Core i3 part in order to be able to catch Core i5 in performance and it will most certainly that will raise Core i3 power consumption to be higher than Core i5.
Fewer transistors will need to “work” harder to match the work done by more Transistors.
So, If I will say that it will need a higher clocked Core i3 to compete against Core i5, I will come to a conclusion that Core i3 will need higher frequency, it will use more power and that will make its IPC lower than Core i5 when in fact we are talking of the same architecture for both of them.
Since Dual module four core Bulldozer will be smaller (if it would be a dual module die)and will have fewer transistors and it is expected to be cheaper than Core i5, comparing the two and coming to conclusions about Bulldozer IPC, performance and power usage in general is invalid.
Again if you will compere a Quad Module 8 core Bulldozer against Core i5 you will come to the opposite conclusions that core i5 has to be OCed higher in order to match 8 core BD and the conclusion will be that Core i5 needs higher clocks and more power than Bulldozer.
So I believe that FX-4000 series will go against Core i3, FX-6000 series will compete against Core i5 and FX-8000 series will compete against core i7 (perhaps even against some 6-core), both in price, performance and for the first time in years, in power usage too.
Edit: I do believe that the best comparison in order to see the architecture strong and weak points of BD vs SB will be to compare one BD Module against one SB Core.
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