X4 Propus 620 2.6GHz vs. X3 425 Rana 2.7GHz

So I've narrowed down my build to two CPU's and need your input on overclocking.

Originally my thoughts were to go with the x4 because its quad core and only $99 right now. However I read that the 4th core can be unlocked on the X3's, if I go X3 its only $75. Is it worth the extra $25, or can I essentially overclock it just as much as the X4?

RAM - G.SKILL 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model -
I also don't know if the ram can be used with both AM2+ and AM3,although I assume it does. Also I'm don't know about the whole DDR2 vs DDR3 for ram. Is one better for overclocking? As I can't spend a lot on ram but would like 4gb.

Motherboard - ASUS M4A78 Plus AM3/AM2+/AM2 AMD 770 ATX AMD Motherboard - Asus is still a good board for overclocking correct?

-----Choice 1-------
AMD Athlon II X4 620 Propus 2.6GHz Socket AM3 95W Quad-Core
-----Choice 2------
AMD Athlon II X3 425 Rana 2.7GHz 3 x 512KB L2 Cache Socket AM3 95W Triple-Core Processor


I appreciate the help, I don't want to regret my decision as there are so many possibilities and options
3 answers Last reply
More about propus 6ghz rana 7ghz
  1. Unlocking the 4th core is an option but it's not always stable. I personally picked the 620 for that reason.

    Here is a set of timings that will do you well based on your given Mobo, Memory and the 620.

    FSB=250Mhz | 25% OC
    CPU=13x250=3,250Mhz | Stock Voltage
    NB and SB=8x250=2,000Mhz, 9x250Mhz=2,250Mhz | 8x gives Stock but 9x is doable on Stock Voltage
    Memory=4x250Mhz=1,000Mhz, 3.33x250Mhz=832.5Mhz | If you can get your PC6400 to run at 1Ghz stable then cool but I'd drop the Multiplier to 3.33x and go with a more reasonable 832.5Mhz OC

    That's not bad, but go with a newer motherboard and faster DDR3 memory. The price deference isn't much and the performance gains are more then worth it.

    Here's a System alternative using a GIGABYTE Mobo and DDR3. | GIGABYTE boards are easy to OC and well equipped

    GIGABYTE GA-MA785GT-UD3H AM3 AMD 785G HDMI ATX AMD Motherboard | $94.99 at Newegg.com
    AMD Athlon II X4 620 2.6GHz Socket AM3 95W Quad-Core Processor - Retail | $99.00 at Newegg.com
    Crucial Ballistix 2GB (2 x 1GB) 240-Pin DDR3 SDRAM DDR3 1600 | $69.99 at Newegg.com
    Or for $24 more you can have 4GB PC12800
    A-DATA 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 | $93.99 at Newegg.com |This is what I've got. 6.66x250Mhz=1,666Ghz at 1.7 Volt.

    Total is $263.98 with 2GB of memory or $287.98 with 4GB + shipping

    If you have any Questions feel free to ask.
  2. I appreciate your input. Do you think 2gb will be sufficient for Windows 7?
  3. shroomz said:
    I appreciate your input. Do you think 2gb will be sufficient for Windows 7?


    Windows 7 is perfectly functional on 2GB of memory. I've ran Windows 7 RC-1(Beta) on a Single core Socket939 FX53 CPU and 2GB DDR1 PC3200(That's gear from 2005-2006) with nary a hitch.

    Technically an x86 (32bit) OS can't even use 4GB of Memory. The technical limit is about 3.4GB, but that's just a silly number :lol:. By getting 4GB in just 2 sticks, you max out the OS without maxing out the motherboard. If you upgrade to x64 with only 2 sticks in your system, you've got room for 2 more.

    2GB will work perfectly, but just like the 3 core vs 4 core CPU the price differonce is only $24 for twice the Memory.
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