Die size hasn’t changed, clock speeds barely went up, and performance per clock also remained static. But what’s this?

Ah yes, AMD is improving its 45nm manufacturing process and today we have the latest incarnation of AMD’s 45nm silicon.

The first versions of AMD’s 45nm Phenom II couldn’t really go much higher than the final 65nm Phenom without increasing voltage. By comparison, Intel’s Core i7 920 could go from 2.66GHz all the way up to 3.80GHz without so much as a single extra millivolt in our tests.

This new Phenom II however can also hit 3.80GHz without increasing the core voltage. At least that’s what one of our samples did in our testing. Whether it’s 3.8GHz or 3.6GHz, the fact of the matter is that AMD’s 45nm process is improving and that’s what’s behind todays introduction of the Phenom II X4 955. Architecturally the Phenom II hasn't changed; if you're curious about what makes these things tick, please look at our original article on the CPU.

Clocked at 3.2GHz with a 2.0GHz un-core (or North Bridge) frequency, the 955 isn’t that much different from the 940 in terms of clock speed. The two face off in the table below:

CPU Clock Speed un-core Clock (NB Frequency) Die Size Transistor Count TDP Socket
Phenom II X4 955 3.2GHz 2.0GHz 258 mm2 758M 125W AM3 or AM2+
Phenom II X4 940 3.0GHz 1.8GHz 258 mm2 758M 125W AM2+

 

This is a Socket-AM3 part, meaning it can work in both DDR2 based Socket-AM2+ motherboards and DDR3 based Socket-AM3 motherboards. There’s a huge compatibility caveat about AM2+ support but I’ll address that shortly. The Phenom II X4 955 is also a Black Edition part, meaning it has an unlocked clock multiplier for easy overclocking.

Along with the 955 there’s also a 945 being introduced today. The 945 is identical to the 940 in core clock speed but has a 2.0GHz un-core and is also AM3 compatible.

Processor Clock Speed un-core Clock L2 Cache L3 Cache TDP Price
AMD Phenom II X4 955 BE 3.2GHz 2.0GHz 2MB 6MB 125W $245
AMD Phenom II X4 945 3.0GHz 2.0GHz 2MB 6MB 125W $225
AMD Phenom II X4 940 BE 3.0GHz 1.8GHz 2MB 6MB 125W $225
AMD Phenom II X4 920 2.8GHz 1.8GHz 2MB 6MB 125W $195
AMD Phenom II X4 910 2.6GHz 2.0GHz 2MB 6MB 95W $???
AMD Phenom II X4 810 2.6GHz 2.0GHz 2MB 4MB 95W $175
AMD Phenom II X4 805 2.5GHz 2.0GHz 2MB 4MB 95W $???
AMD Phenom II X3 720 BE 2.8GHz 2.0GHz 1.5MB 6MB 95W $145
AMD Phenom II X3 710 2.6GHz 2.0GHz 1.5MB 6MB 95W $125
AMD Phenom 9950 2.6GHz 2.0GHz 2MB 2MB 140W $173

 

The prices are pretty attractive; the 955 will sell for $245 (and it already has been) and the 945 will go for $225. That pits the 955 against Intel’s Core 2 Duo Q9550 ($266) and the Core i7-920 ($284), the latter having a much higher motherboard cost of course.

Processor Price
Intel Core i7-920 (2.66GHz) $284
Intel Core 2 Quad Q9650 (3.00GHz) $316
Intel Core 2 Quad Q9550 (2.83GHz) $266
Intel Core 2 Quad Q9400 (2.66GHz) $213
Intel Core 2 Quad Q8400 (2.66GHz) $183
Intel Core 2 Quad Q8300 (2.50GHz) $183
Intel Core 2 Quad Q8200 (2.33GHz) $163

 

And you know how I love spoiling surprises so here you have it. Unless you’re running applications that are very well optimized for Intel’s architectures, the Phenom II X4 955 is faster than the Core 2 Quad Q9550. Compared to the Core i7-920, it loses hands down although the chip does come close in some games.

Sorry, I’m not much of a tease :) Now for the rest of the article.

Painfully Backwards Compatible
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  • andi333 - Saturday, August 14, 2010 - link

    Many online reviews written by the computer hardware. Regard it as the person seeking advice testdrives Ferrari to life when you want to buy a car for your daily needs of commuting, and he might start telling you how bad the Toyota Prius, regardless of cost or requirement. In the world of processors, this is BMW's very good that you managed to buy a very cheap price. Reply
  • bckolte - Wednesday, December 07, 2011 - link

    i m using AMD 955 Balack Edition with Asus MotherBoard M5A78MLX is that mother board is compatible with the processor or not
    becouse with this combination i got an error on bootup the system
    THE CPU IS NOT SUPPORTED TO THIS PRODUCT TO DETAIL GO TO WEB SITE ASUS.COM
    Now sir Help Me Or Guied me is that Motherboard is supported for AMD Pheonem 955 II Processor wht do i do with the error its a serious thing for the system or i have to ignore it
    Reply
  • freeinstafollowersteam - Tuesday, January 24, 2017 - link

    I'm guessing that he is showing the processor's actual speed during the test. The 2.8GHz speed likely is due to the i7's native ability to overclock itself via Turbo Mode (see page 4 of the article). Turbo mode tends to activate pretty much any time a load is on the CPU. But it's not really "unfair" as all i7 users get that benefit without doing anything extra, plus i7 chips still overclock far beyond that point. http://www.freeinstafollowers.info/ Reply
  • Kickzing - Thursday, March 23, 2017 - link

    AMD is really good and I really like how they run cooler than Intel. It's helped me to build my website http://getfreeinstagramfollowersteam.com so thanks AMD! Reply
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    Now finding perfect hosting for your blog is very easy just visit our web hosting comparison page on blogbeginner.
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    Reply

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