![]() AM3 processors are also completely backwards compatible with AM2+ motherboards.Īlthough it was initially speculated that AMD would increase the 元 cache of these new Phenom processors from 6MB to 8MB, this has not been the case, and the Phenom II X4 955 still carries the same 6MB as its predecessors. The most prominent change is that these are AM3 processors, and therefore can be used with either DDR2 or DDR3 memory. Today AMD is releasing two new processors, the Phenom II X4 955 and 945, which are based on the same "Deneb" architecture though with a few notable changes. This is an impressive feat for AMD, offering the best value in this price range. In terms of performance we found it closely matched the Core 2 Quad Q9650, which was considerably more expensive at $540 then, and even today it is still fetching around $330. The flagship model, also known as the Phenom II X4 940, debuted at just $270, while today it can be had for the bargain basement price of $190. ![]() Although the launch was comprised of just two processors, that's all AMD needed to compete head to head with the Intel Core 2 Quad range. ^ In this article, the conventional prefixes for computer memory denote base-2 values whereby “kilobyte” (KB) = 2 10 bytes.AMD kick started 2009 with guns blazing introducing their latest Phenom II X4 platform on early January.^ VR-Zone report Archived October 11, 2007, at the Wayback Machine.^ "AMD Revised Desktop Model Number Structure".Archived from the original on 21 August 2007. ^ "Model Number and Feature Comparisons AMD Athlon 64 X2 Dual-Core and AMD Athlon X2 Dual-Core Processors".Archived from the original on June 6, 2007. ^ "How to decipher AMD's new CPU naming code".^ "AMD Expands Upcoming Processor Branding".^ "Final AMD "Stars" Models Unveiled"."Linux kernel patch reveals TLB bug's workings". Archived from the original on 3 January 2008. ^ "AMD Family 10h revision B2 Erratum 298 and L2 Eviction Bug Workaround".^ "High Performance AMD Phenom X4 Processors Lead the Charge to HD Desktop Gaming and Video".Archived from the original on 8 March 2008. ^ "Phenom TLB patch benchmarked: A look at how AMD's BIOS workaround impacts Phenom performance".^ "More Details on AMD "Stars" Chipsets".^ "AMD to Drop "Athlon" Moniker on the High End".Some Sempron processors use the prefix LE (for example, "Sempron LE-1200")Ĭores Phenom X4 Agena (65 nm SOI) Energy Efficient products end with an “e” suffix (for example, "Phenom 9350e"). The Phenom model numbering scheme, for-later released Athlon X2 processors, is a four-digit model number whose first digit is a family indicator. The model numbers of the Phenom line of processors were changed from the PR system used in its predecessors, the AMD Athlon 64 processor family. AMD Phenom-based processor familyĬPU features table Model naming methodology The program was said in December 2007 to have received "minimal functional testing." ĪMD launched several models of the Phenom processor in 20 and an upgraded Phenom II in late 2008. This method causes less performance loss than previous workarounds. Īn AMD subsidiary released a patch for the Linux kernel, to overcome this bug by software emulation of accessed- and dirty-bits. "B3" stepping Phenom processors were released Mawithout the TLB bug and with "xx50" model numbers. This penalty was not accounted for in pre-release previews of Phenom, hence the performance of early Phenoms delivered to customers may have been less than the preview benchmarks. BIOS and software workarounds disable the TLB, and typically incur a performance penalty of at least 10%. īefore Phenom's original release a flaw was discovered in the translation lookaside buffer (TLB) that could cause a system lock-up in rare circumstances Phenom processors up to and including stepping "B2" and "BA" are affected by this bug. The processors are on the Socket AM2+ platform. The first processor in the family was released in 2007.ĪMD considers the quad core Phenoms to be the first "true" quad core design, as these processors are a monolithic multi-core design (all cores on the same silicon die), unlike Intel's Core 2 Quad series which are a multi-chip module (MCM) design. Triple-core versions (codenamed Toliman) belong to the Phenom 8000 series and quad cores (codenamed Agena) to the AMD Phenom X4 9000 series. 16 in normal decimal numbers) processors, sometimes incorrectly called "K10h". Phenom / f ɪ ˈ n ɒ m/ is the 64-bit AMD desktop processor line based on the K10 microarchitecture, in what AMD calls family 10h (10 hex, i.e.
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