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Written by Hank Tolman   
Tuesday, 11 May 2010
Table of Contents: Page Index
AMD Athlon-II X3-445 AM3 Processor
Features and Specifications
Closer Look: Athlon-II X3-445
Testing and Results
EVEREST Benchmark Tests
Passmark PerformanceTest
PCMark Vantage Benchmark Tests
SiSoftware Sandra
Cinebench R11.5 Benchmarks
Video Game Benchmarks
AMD Athlon-II X3 Final Thoughts
ADX445WFGMBOX Conclusion

Athlon-II X3 AM3 Features

AMD Direct Connect Architecture

An award-winning technology designed to reduce bottlenecks that can exist when multiple components compete for access to the processor bus. Competing x86 systems use a single front-side bus (FSB) which must carry memory access, graphics, and I/O traffic. Eliminate the FSB, and you can reduce delays that competing access requests can cause.

45 nm Process Technology with Immersion Lithography

More efficient process technology with cutting-edge lithographic performance puts more transistors in less space.

AMD Wide Floating Point Accelerator

Doubles processor bandwidth from 64- to a full 128-Bit Floating-Point math processing pipeline that can double many of the bandwidth paths that help keep it full.

AMD Digital Media XPress 2.0 Technology

Provides support for SSE, SSE2, SSE3, SSE4a, and MMX instructions for digital media applications and security.

CPU Architectural Features

True Multi-Core Processing

The extensive AMD64 architectural optimizations and features enable thorough integration of multiple cores within the same processor, with each core having its own L1 and L2 caches.

AMD Dedicated Multi-Cache

Each core has its own dedicated L2 cache, which enables simultaneous independent core access to L2 cache, eliminating the need for cores to arbitrate for cache access. This helps reduce latency on L2 cache accesses.

AMD Virtualization (AMD-V) Technology

Silicon feature-set enhancements designed to improve the performance, reliability, and security of both existing and future virtualization environments.

AMD PowerNow! 3.0 Technology

The latest power management technologies that deliver performance on demand when you need it, and power savings when you don't.

HyperTransport 3.0 Technology

Third-generation HyperTransportTM interface improves performance, supporting transfer speeds up to 4.4GT/s.

Simultaneous 32-bit and 64-bit Computing

AMD64 technology enables a breakthrough approach to 64-bit computing that doubles the number of registers in the processor and allows PC users to use today's 32-bit software applications while enabling them to also use the next generation of 64-bit applications.

Cool'n'Quiet 3.0 Technology

Up to eight different performance states help enhance power efficiency. Simplified performance state transitions can reduce latency and the software overhead of performance state changes.

AMD Dynamic Power Management

Each processor core, and the integrated memory controller and HyperTransportTM controller, is powered by dedicated voltage planes.

Integrated Dual-Channel Memory Controller

Directly connects the processor to memory for optimum performance, low latency, and high throughput.

Multi-Point Thermal Control

The next-generation design features multiple on-die thermal sensors with digital interface. Automatic reduction of p-state when temperature exceeds pre-defined limit. Additional memory thermal management interface.

AMD CoolCore Technology

Coarse and fine transistor control that can automatically reduce processor energy consumption by turning off unused parts of the processor.

ADX445WFK32GM SpecificationsAMD_Logo_250px.png

  • Model Number & Core Frequency: X3-445 = 3.1GHz
  • L1 Cache Sizes: 64K of L1 instruction and 64K of L1 data cache per core (384KB total L1 per processor)
  • L2 Cache Sizes: 512KB of L2 data cache per core (1.5MB total L2 per processor)
  • Memory Controller Type: Integrated 128-bit wide memory controller *
  • Memory Controller Speed: 2.0GHz with Dual Dynamic Power Management
  • Types of Memory Supported: Support for unregistered DIMMs up to PC2-8500 (DDR2-1066MHz) -AND- PC3-10600 (DDR3-1333MHz)
  • HyperTransport 3.0 Specification: One 16-bit/16-bit link @ up to 4.0GHz full duplex (2.0GHz x2)
  • Total Processor-to-System Bandwidth: Up to 37.3 GB/s bandwidth [Up to 21.3 GB/s total bandwidth (DDR3-1333) + 16.0GB/s (HT3)]
  • Packaging: Socket AM3 938-pin organic micro pin grid array (micro-PGA)
  • Fab location: GLOBALFOUNDRIES Fab 1 Module 1
  • Process Technology: 45-nanometer DSL SOI (silicon-on-insulator) technology
  • Approximate Die Size: 169 mm2
  • Approximate Transistor count: ~ 300 million
  • Max Temp: 75 Celsius
  • Core Voltage: 0.85-1.4V
  • Max TDP: 95 Watts
  • AMD Codename: "Rana"
  • MSRP: $87

    *Note: configurable for dual 64-bit channels for simultaneous read/writes



# RE: AMD Athlon-II X3-445 AM3 Processorivo 2010-10-01 13:15
Thanks for this great review.
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# OC w/ Biostar A880G+ Help plz!Zac 2010-12-04 17:14
I have the AM3 Biostar A880G+ mboard and the Athlon II x3, Ragas but its actually a Propus core which unlocks fourth core but no L3. The temps run great at 3.9ghz OC, but I cant get it to run stable. I have Coolermaster 212 Plus.

I have to set the memory to manual, and put it at 800mhz as when I raise the FSB, it will raise the memory and NB speed with it. (FSB/Memory/NB frequency is locked, if FSB goes up, others go up too) If i set memory to auto or limit mode, it starts at 1333 no matter what.

The best OC/stable I can do is 210-15 fsb = 3.25 & 4 cores.

*I can get an oc of 3.5ghz, and memory at 500/1000mhz w/ FSB AT 250x14, NB 2500. Funny thing is my memory will be at 800, and increases with fsb oc to 1000, which is a lower clock than 1333 BUT i have to increase the memory voltage to 1.7!! Makes no sense!

I understand that you have similar hardware in this review, and I'm curious what you did with the Biostar motherboard, and where you got stability. I cant get stability between 217-250 on FSB. I have no idea where my memory will be stable at, except 1333 at 200 and 1000 at 250 with insanely high voltage increase.
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# List of specs.Zac 2010-12-04 17:19
AMD Athlon II x3, Propus w/ 4th core, no L3.
Biostar A880G+ mboard
Radeon 4870 1GB
600watt PSU, 80%
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# RE: AMD Athlon-II X3-445 AM3 ProcessorHank 2010-12-05 06:44
Hi Zac,

First off, my best guess at your problem would be that the 4th core you unlocked is probably bad and causing all your problems. Have you tried leaving that core disabled and overclocking?

Also, remember that AMD motherboards don't have an FSB, they have an HT Link and the "Bus speed" you are increasing for your overclock is just CPU/HT Reference clock. Your memory shouldn't have trouble adjusting to the increasing reference clock that much.

Rather than downclocking your memory, try increasing the memory latency to 9-9-9-27. I'd leave the memory voltage alone. If you need to increase the NB voltage because of the higher reference clock, I'd stay south of 1.4v. Also, I'd stay lower than about 1.6v on your CPU voltage, especially because the A880G+ doesn't have a MOSFET Heatsink or anything.

First, though, try disabling that fourth core. I'll bet you have much better luck overclocking after that.
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# comparison tablepaulo 2010-12-07 08:44
I would like to know which Intel processor is equivalent to the AMD Athlon II X3 - 445 - 3.1GHz ?
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# Comparible Intel CPUHank 2010-12-07 09:09

I suppose that depends on a lot of variables. Where price is concerned, a Pentium Dual-Core, maybe a E5400 or thereabouts will be the closest comparison. However, the X3-445 will easily outperform a Pentium Dual-Core E5400. Where performance is concerned, I would say the X3-445 falls between an i3-560 (about twice as expensive) and an i5-650 (about $100 more than the X3-445). Of course, that's all relative, because the i3-560 and i5-650 both have an L3 cache while the X3-445 doesn't. Additionally, they have other features such as an on die GPU that the X3-445 doesn't have. So really, that's a difficult question to answer. What exactly are you after? Price? Performance? A middle-ground between the two? A lot will depend on your other hardware as well.

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# RE: Comparible Intel CPUpaulo 2010-12-07 09:36
I need to know an equivalent in performance (MHz) in some other Intel processor for my "future" Athlon-II X3 445 3.1 MHz.

I haven't bought the processor yet, I'm just waiting for an answer to whether the comparison is worth buying the Athlon or not.

sorry about the english, I used Google...
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# Comparible Intel CPUHank 2010-12-07 13:28

Zac is right, the X3-445 outperforms much more expensive processors from Intel. My recommendation would be that, unless you want to do some very CPU intensive tasks, the X3-445 is a great processor and you won't find an equivalent for the same value on the Intel side.

By the way, what language do you speak? Porque si hablas espanol, podemos hablar en tu propio idioma y no tendras que usar Google para traducir.
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# languagepaulo 2010-12-07 14:42
dear Hank,

I speak portuguese...

Hank what happens is that I'm building a computer for a client, this client asked me to see how would the final price of the computer with this processor Athlon-II X3 445 3.1 MHz.

Then, the client remembered that a 3.1 MHz AMD processor "is not" the same as an Intel processor with 3.1 MHz and the client asked me to find a "table of equivalence" between Intel and AMD...

and this table is that I'm looking for the fastest possible because the customer wants the budget of the computer on Friday...

thanks a lot...
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# Intel 3.1GHzHank 2010-12-07 16:01
Unfortunately, I don't speak portuguese. :(
As far as clock speed is concerned,
The i3-550 is 3.2GHz and costs about $129.
The i5-650 is 3.2GHz and costs about $179.
The AMD X3-445 is 3.1GHz and costs about $79.

In most benchmarks, the X3-445 will perform better than the i3-550 and slightly worse than the i5-560. Again, it really depends on the types of things your client will be using the computer for. For most applications the X3-445 is much better for it's price. For 3D rendering, video encoding, or, frankly, file compression, the Intel CPUs will outperform the X3-445 and might be a better choice.

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# RE: AMD Athlon-II X3-445 AM3 ProcessorZac 2010-12-07 11:57
I thought I had adjusted the memory timings manually before, but It must of been a bad clock or something. Changing them to 99924 allowed me to have lower voltage and better over-clock results. Im still towing with it. Ive got x3 cores and 3.62 OC. I cant get over 3.3ghz w/ 4th core unlocked.

About the L3 CACHE, I dont think it matters much for gaming unless you play EQ2. This chip passes the i3 and nearly competes directly with the i5 in Passmark, but im not really interested in much but gaming performance.
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# RE: AMD Athlon-II X3-445 AM3 ProcessorZac 2010-12-07 13:38
I was also successful to OC it at 3.85ghz 14.5x266. But just (1) core.

@Hank, in the ACC it has percentage listing from -8% to +8% per core. Do you know anything about this? Some error calibration? I could not find anything on it. Also, if your NB and chip voltage jump a few degrees what is that a sign of? should I raise or lower one til they stop jumping?

Whats the max bus speed you guys seen these am3 II chips go? does a 1:1 ratio with memory matter any on amd cpus?
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# ACCHank 2010-12-07 13:56

There is very little released about the ACC values, but the key to it is that decreasing a negative % will allow you to undervolt the core with the value and increasing the positive % will allow you to effectively overclock the core better. That was the initial intent of ACC, not just to unlock cores, but to adjust the cores individually.
By the way, the Biostar 880G motherboard shouldn't have ACC. AMD removed ACC from the 800 series motherboards. Biostar has the BIOUnlocKING feature, but it should function similarly.

That being said, if you use Prime95 to stress the cores, you can find out which ones are failing at your overclock levels. Then you can change those values under the ACC in the bios to try for better overclocks. For example, if your unlocked 4th core is failing, increase it to 1% in the ACC and try again, then 2% etc.

The jump in voltage is just because there isn't an extremely accurate voltage regulator interface from the BIOS to the motherboard. That's why, even when you increase the voltage to 1.6v, for example, CPUZ will only register that 1.52v is going to the CPU. Sandy Bridge could change this....
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# HT/CPU Reference ClockHank 2010-12-07 16:04
For the CPU/HT Reference Clock, I have gone as high as between 310-320 when I have reduced the CPU Multiplier. This can be a better option with locked multiplier CPUs like the X3-445, but I have generally found that the 250-265 range is the most stable, again, depending on the CPU.

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# RE: AMD Athlon-II X3-445 AM3 ProcessorAriel 2011-01-20 21:47
I'll buy a processor soon but do not know which. Do you know if Athlon II x3 445 is very worse than Phenom II x2 555? I mean... the price difference justifies buying Phenom or the Athlon is only little worst and the difference is minimal?
Thank you!
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# RE: RE: AMD Athlon-II X3-445 AM3 ProcessorHank 2011-01-21 11:14
To tell you the truth, I would buy the Athlon-II X3-445 over the Phenom-II X2-555 any day of the week. Look at my review of the Phenom-II X2-560BE to see direct comparisons between that and the Athlon-II X3-445.

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# RE: RE: RE: AMD Athlon-II X3-445 AM3 ProcessorAriel 2011-01-21 16:56
Oh, I thought the Phenom x2 was better than Athlon x3 because is more expensive...
The reviews are very clear! Thank you!
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# MrThomas DAmico 2011-11-27 19:15
Just won a AMD Athlon-II X3-445 AM3 Processor on ebay as shown in this link:





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# MotherboardsHank Tolman 2011-11-28 07:07
Congratulations on your win! As far as motherboards go, that is an extremely broad question. Any AM2+, AM3, or AM3+ motherboard would accept the AMD Athlon-II X3-445. Which one is best for you depends on a lot of factors. How much are willing to spend? What are you going to be using the system for?

I would recommend an AM3 motherboard. A 880G or 890GX chipset would do nicely, but a 700 series motherboard would be less expensive and work great also. Just search for AM3 motherboard and see what suits you. You'll need DDR3 RAM and I would recommend a dual channel kit. Any cooler for an AM2 or higher socket will fit. As far as cases go, anything that fits a mATX case or better will work for you.

Have fun building your system!

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