From Wikipedia, the free encyclopedia
Phenom II is a family of 's multi-core 45 nm
microarchitecture, succeeding the original .
released the
version of Phenom II in December 2008, while
versions with
support, along with an initial batch of triple- and quad-core processors were released on February 9, 2009. Dual-processor systems require
for the . The next-generation Phenom II X6 was released on April 27, 2010.
The Phenom II X4 operates as the processor component of AMD's , which also includes the
graphics. The Thuban Phenom II X6 is the CPU in the Leo Platform which also includes the
The Phenom II triples the shared L3 cache size from 2MB (in the original Phenom line) to 6MB, leading to benchmark performance gains as high as 30%. In another change from the original Phenom,
applies to the processor as a whole, rather than on a per-core basis. AMD implemented this to address the mishandling of threads by , which can cause single-threaded applications to run on a core that idles at half its clock rate. This feature can be disabled through BIOS options on most motherboards, which allows for customization and overclocking. Due to the nature of this feature, it reduces the effectiveness of overclocking the CPU and RAM, but also decreases power consumption and heat output.
versions of the Phenom II (920, 940) lack forward-compatibility with Socket AM3.
versions of the Phenom II are backwards-compatible with , though this is contingent on motherboard manufacturers supplying BIOS updates. In addition to the Phenom II's pin compatibility, the AM3
supports both
memory (up to DDR2-1066 and DDR3-1333), allowing existing AM2+ users to upgrade their CPU without changing the motherboard or memory. However, similar to the way the original Phenom handled DDR2-1066, current Phenom II platforms limit the usage of DDR3-1333 to one DIMM otherwise, the DIMMs are under clocked to DDR3-1066. AMD claims that this behaviour is due to the BIOS, not the memory controller, and plans to address it with a BIOS update. The dual-spec memory controller also gives motherboard manufacturers and system builders the option of pairing AM3 with DDR2, as compared to competing chips from Intel which require DDR3.
"Thuban" and "Zosma" Phenom II processors support AMD's
performance-boost technology. When not all cores are needed, the processor will automatically overclock up to half of the cores by up to 500 MHz, leaving the other half idle. In turn, when the application demands more than half of the cores, the processor will run on standard clock rate and with all cores enabled.
Some top-level AM3 processors (x945 125W, x955 and x965) require a special power-supply feature, often called "dual power-plane". It's supported by default in all native AM3 mainboards, however not in most AM2+ mainboards, even those advertised as "AM3 optimized" or "AM3 ready". Processor running below its nominal speed (i.e. at 800 MHz), clock and multiplier locked are symptoms of this incompatibility. This is caused by the processor itself: when it detects that the motherboard does not supply dual power planes, the chip locks its multiplier to 4x. This issue is not resolvable via a BIOS however, users of AM2 and AM2+ motherboards can still use Phenom II processors excluding the 125 watt variants.
AMD Phenom II-based processor family
Triple-core
Code-named
45 nm
45 nm
45 nm
45 nm
45 nm
Date released
Beginning with the AM3 versions, Phenom II CPUs are based on two dies: the original Deneb die with four cores and the new Thuban die with six. These are divided into five series for marketing. The first two series are flagships based on full dies. The other three series are formed from Deneb dies by die harvesting, that is, chips that were produced with some amount of defects. The affected portions of these chips are disabled and the chips themselves marked as a lower-grade product.
Diagram of the
of a four-core Phenom II processor.
1000T series: Flagship X6 series with full complement of cores, L3 cache enabled and Turbo Core.
900T series: Based on X6 series but with two cores disabled and Turbo Core.
900 series: X4 series with full complement of cores and L3 cache enabled.
800 (original) series: These are X4 chips with some amount of defect in the L3 2 MB is disabled, leaving the chip with 4 MB L3 cache and fully operational cores. Available as model 805, 810, 820 and 830.
800 (second) series: These are chips based on the Athlon II Propus quad-core without L3 cache albeit marketed as Phenom II, available as model 840 and 850
700 series: These chips have one core disabled, leaving them with three operational cores (marketed as "X3") and a fully operational L3 cache.
500 series: These chips have two cores disabled, leaving them with two operational cores (marketed as "X2") and a fully operational L3 cache.
Some versions of the Phenom II X2 and X3 have one or two cores "deactivated" to enable AMD to target the lower end of its market. However, from outside, a user can never determine whether the disabling of the core(s) was merely due to marketing reasons (with the disabled cores being fully functional in reality) or whether they are actually defective hardware-wise. So even though with the correct motherboard and BIOS, it is possible to unlock the deactivated core(s) of the processor, success is never guaranteed, because the user might catch the awkward case where one or more core(s) were deactivated due to faulty silicon. Hardware enthusiast websites have collected and summarized anecdotal reports that, overall, indicate about a 70% success rate, but these reports likely have , and more importantly, it is impossible to know whether an unlocked core is truly bug-free.
An AM3 socket with an inserted AMD Phenom II X3 720 Black Edition CPU.
According to , Black Edition CPUs are "designed to help you unleash the maximum potential of your system with tunable performance." What this means is that the core multiplier is unlocked, allowing for modification of the CPU speed without changing the
or HyperTransport. On a non-black edition CPU, the multiplier is allowed to only be lowered. The standard processors allow for overclocking, however not to the point that a Black edition CPU will.
The Phenom II range of CPUs is the first series of AMD CPUs to have a low enough minimum temperature of operation to support "extreme" cooling methods such as ,
or , a deficiency in older CPUs referred to as the "Cold Bug".
In a public demonstration of the Phenom II's overclocking potential at
2009 in Las Vegas on 10 January 2009, Sami "Macci" M?kinen (a record-breaking overclocker) used a Phenom II X4 940 and a DFI LANParty 790FXB-M2RS with a combination of liquid nitrogen and liquid helium cooling to take the processor to a clock rate of 6.5 GHz and succeeded in beating the world record 3DMark 2005 score with a total of 45474.
A group named LimitTeam successfully overclocked AMD’s Deneb 45 nm Phenom II X4 955 processor (Black Edition) on April 30, 2009, and submitted the results for validation to CPU-Z. During the process, the group used the Asus M4A79T Deluxe motherboard, dubbed as the Asus “multidimensional performance platform” featuring support for an AMD 140W CPU and the AMD 790FX/SB750 chipset. As a result, the group reached 7.127 GHz, beating the previous score of 6.7 GHz.
Note that these extreme overclocks involve specialized equipment and are nowhere near what the average consumer could expect using traditional air cooling even with expensive third party cooling fans. For instance, maximum overclocking on a Phenom II X4 955 processor using a heatsink and fan is approximately 4 GHz.
45 nm
+ 64 kB ( + ) per core
L2 cache: 512 kB per core, full-speed
L3 cache: 6
shared among cores.
Memory controller: dual channel DDR2-;MHz (AM2+), dual channel DDR3-1333 (AM3) with unganging option
, Extended , , , , , , , ,
Turbo Core
with 2 GHz
Die size: 346 mm?
Power consumption (): 95 and 125 watt
First release
27 April 2010 (E0 Stepping)
Clock rate: 2.6 to 3.3 GHz, up to 3.7 GHz with Turbo Core
cores chip harvested from Thuban with two cores disabled
45 nm
+ 64 kB ( + ) per core
L2 cache: 512 kB per core, full-speed
L3 cache: 6
shared among cores.
Memory controller: dual channel DDR2-;MHz (AM2+), dual channel DDR3-1333 (AM3) with unganging option
, Extended , , , , , , , ,
Turbo Core
with 2 GHz
Power consumption (): 95 Watt
First release
Unknown, only released to certain OEMs.
Clock rate: 2.7 GHz to 3.5 GHz
45 nm
+ 64 kB ( + ) per core
L2 cache: 512 kB per core, full-speed
L3 cache: 6
shared among cores.
Memory controller: dual channel DDR2-;MHz (AM2+), dual channel DDR3-1333 (AM3) with unganging option
, Extended , , , , , , , ,
with 1.8 to 2 GHz
Die Size: 258 mm?
Power consumption (): 65, 95, 125 and 140 Watt
First release
8 January 2009 (C2 Stepping)
Clock rate: 2.5 to 3.7 GHz
except Phenom II X4 840T, Phenom II X4 960T BE and Phenom II X4 970 BE (E0 stepping)
cores chip harvested from Deneb, with one core disabled
45 nm
L1 : 64 kB + 64 kB ( + ) per core
L2 cache: 512 kB per core, full-speed
L3 cache: 6 MB shared among cores
Memory controller: dual channel DDR2-;MHz (AM2+), dual channel DDR3-1333 (AM3) with unganging option
, Extended , , , , , , , ,
with 2 GHz
Power consumption (): 65 and 95 Watt
First release
9 February 2009 (C2 Stepping)
Clock rate: 2.5 to 3.0 GHz
cores chip harvested from Deneb, with two cores disabled
45 nm
L1 : 64 kB + 64 kB ( + ) per core
L2 cache: 512 kB per core, full-speed
L3 cache: 6 MB shared between cores
Memory controller: dual channel DDR2-;MHz (AM2+), dual channel DDR3-1333 (AM3) with unganging option
, Extended , , , , , , , ,
with 2 GHz
Power consumption (): 94 Watt (C2 stepping) and 80 Watt (C3 stepping)
First release
1 June 2009 (C2 Stepping)
Clock rate: 3.0 to 3.5 GHz
, AnandTech,
Anh Tuan Huynh (July 2, 2007), , DailyTech
Parm Mann (). . HEXUS.net.
, AnandTech,
, AnandTech, , p. 3
, AnandTech, , p. 9
, AnandTech, , p. 6
March 30, 2009, at the .
, , Both the AMD Phenom II X6 1055T and 1090T come equipped with AMD's new Turbo CORE technology. AMD Turbo CORE technology is a performance boosting technology that automatically switches from six cores to three turbocharged core for applications that just need raw speed over multiple cores. While in Turbo CORE mode, the AMD Phenom II X6 1090T shifts frequency speed from 3.2GHz on six cores, to 3.6GHz on three cores, making it the fastest processor AMD has ever created.
, The Inquirer
Anand Lal Shimpi (),
Vilches, Jose (), ,
Andreas Galistel (). . NordicHardware.
Wikimedia Commons has media related to .
sockets and chipsets
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投币机镇楼-------------------------------------------------------楼主有台老机子，配置：处理器 AMD Phenom(羿龙) II X4 955 四核主板 微星 970A-G46 (MS-7693) ( ATI RD890 PCI to PCI bridge (external gfx0 port B) )内存 8 GB ( GLOWAY DDR3 1600MHz )主硬盘 GLOWAY STK120GS3-S7 ( 120 GB / 固态硬盘 )显卡 Nvidia GeForce GTX 650 ( 1 GB / 索泰 )显示器 三星 SAM05CA SyncMaster ( 19.1 英寸 )声卡 瑞昱 ALC892 @ ATI IXP SB600/SB700/SB800 高保真音频网卡 瑞昱 RTL12 Gigabit Ethernet Controller / 微星---------------------------------------------------按理说玩玩网游应该不成问题，但是实际上玩龙之谷无论高低特效都不超过25帧，看视频卡顿延迟现象，鲁大师跑分看起来都很正常，就是内存有点不稳定，一会无五千多，一会差不多7千，原来以为板子不支持双通道，换了单条8G也是一样，本不报任何希望，每次都找不出问题出在哪，很不甘心，这个配置只能上上网、斗地主。。。。。想想帧数是CPU建模，数据都是内存送过去的，加上内存跑分不稳定，以为是内存槽坏了，试试降频跑跑试试，进入BIOS，频率强制成1333，高特效一进游戏比德芙还顺滑，跑了一下分，内存稳定在7500分---------------------------------------------------------是否能断定AMD955不兼容1600内存工作频率呢？
上海洪庙文艺家具厂—专业实木家具定制厂家,设计制作一站式服务,省心放心！
内存控制器是1333，你如果达到1600肯定是主板艹的吧，可以考虑回1333，还有查下硬盘有没问题。650没那么弱。
之前是这样的：
上性价比神条：
可能吧，要是我就砸了
额，我也有955，玩玩游戏啥问题没有
看到鱼竿的内存条就懂了
跟955没有关系，换根正经内存条来测试可好？？
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