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Asus M4A79T and 955 BE with which Memory?

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August 7, 2009 4:46:26 PM

Someone please clarify this cr@p...

DDR2 1300(O.C.)/1200(O.C.)/1066*/800/667 ECC,Non-ECC,Un-buffered Memory
*Due to AMD CPU limitation, DDR2 1066 is supported by AM2+ / AM3 CPU for one DIMM per channel only. Refer to www.asus.com for the memory QVL (Qualified Vendors Lists).

I've seen that comment on the egg regarding most amd based asus boards that support ddr2 1066 memory. If that statement is true, then you can't populate all 4 slots in order to get 8gb or 16gb total memory if it is ddr2-1066 memory. That is ghetto! What about ddr3-1333? Is that also limited? If I get this board along with a 955 be and a dark knight cooler, I need to know what memory to get, as I'll likely end up populating all 4 slots with 2gb dimms for a total of 8gb at a minimum, since i'm running win7 rtm x64.

Wow, that was a drawn out sentence. So much for my grammar this afternoon. :)  Any input would be appreciated, including alternative motherboards models similarly priced with at least 6 sata-2 connectors and at least 4 memory slots.

-- MaSoP

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August 7, 2009 5:25:53 PM

Ok so here's the deal regarding 1066Mhz...

If you want to run your Ram @ 1066Mhz you can only use 4Gb Ex: 2 x 2Gb = 4Gb @ 1066Mhz

If you decide to use more than 4Gb of Ram the it will max out at 800Mhz.

This is due to the AMD memory controller and not the motherboard....

Note : If you feel that 800Mhz is not enough for your needs then you should be looking at the AM3 boards that support DDR3......
August 7, 2009 5:57:34 PM

OvrClkr said:
Ok so here's the deal regarding 1066Mhz...

If you want to run your Ram @ 1066Mhz you can only use 4Gb Ex: 2 x 2Gb = 4Gb @ 1066Mhz

If you decide to use more than 4Gb of Ram the it will max out at 800Mhz.

This is due to the AMD memory controller and not the motherboard....

Note : If you feel that 800Mhz is not enough for your needs then you should be looking at the AM3 boards that support DDR3......


Ok, so it's good to know it will simply run at 800, if more than 4gb is installed (ie; 4 slots occupied) with 1066 memory, rather than not work at all. The m4a79t deluxe supports ddr3 according to the specs. The following stock multipliers are what would be used, correct?

(pc2-6400) ddr2-800 w/955 BE = 200 mhz x 16 = 3.2ghz
(pc2-8500) ddr2-1066 w/955 BE = 266 mhz x 12 = 3.192ghz

(pc3-6400) ddr3-800 w/955 BE = 200 mhz x 16 = 3.2ghz
(pc3-8500) ddr3-1066 w/955 BE = 266 mhz x 12 = 3.192ghz
(pc3-10600) ddr3-1333 w/955 BE = 333 mhz x 9.5 = 3.163ghz
(pc3-12800) ddr3-1600 w/955 BE = 400 mhz x 8 = 3.2ghz

Could someone make any corrections to the numbers above, if needed? All assuming stock speeds for mem and cpu, no OC'ing in this case. Thanks.

-- MaSoP
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August 7, 2009 6:04:18 PM

As far as I know the m4a79t deluxe is an AM3/DDR3 board and does NOT support DDR2 memory. If this is the board that you are purchasing then you should go by these specs :

ASUS M4A79T Deluxe AM3 DDR3 AMD 790FX ATX AMD Motherboard - Retail
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Note : There are better AM3 boards out at the moment at a cheaper price......

August 7, 2009 6:12:44 PM

OvrClkr said:
As far as I know the m4a79t deluxe is an AM3/DDR3 board and does NOT support DDR2 memory. If this is the board that you are purchasing then you should go by these specs :

ASUS M4A79T Deluxe AM3 DDR3 AMD 790FX ATX AMD Motherboard - Retail
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Note : There are better AM3 boards out at the moment at a cheaper price......


Any suggestions for a better board for less? :-) If I was to do a major core upgrade, I'd want to cut my cost to no more than $500 for a mb, cpu, mem and gpu combo. I've read that gigabyte has some good models.

-- MaSoP
August 7, 2009 6:36:29 PM

OvrClkr said:
Yes Sir,

In my opinion this board is more stable than the Asus :

GIGABYTE GA-MA790FXT-UD5P AM3 DDR3 AMD 790FX ATX AMD Motherboard - Retail
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

or

GIGABYTE GA-MA790XT-UD4P AM3 DDR3 AMD 790X ATX AMD Motherboard - Retail
http://www.newegg.com/Product/Product.aspx?Item=N82E168...


I'm curious what the real-world difference is between the 790X and 790FX. They seem quite similar. I like the 10 sata-2 ports the GA-MA790FXT-UD5P has. I'm already maxing out my existing 6 ports as it is on my M2N-E board.

-- MaSoP
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August 7, 2009 6:57:41 PM

FX is considered AMD's "FLAGSHIP" board and normally it comes with more than 2 PCI-E slots for massive GPU firepower......

If you are not a hard-core gamer that normally HAS to have more than 2 video cards then the 790XT is more than enough.....

790X boards use DDR2 and have less features than the FX series....
August 7, 2009 7:15:47 PM

OvrClkr said:
FX is considered AMD's "FLAGSHIP" board and normally it comes with more than 2 PCI-E slots for massive GPU firepower......

If you are not a hard-core gamer that normally HAS to have more than 2 video cards then the 790XT is more than enough.....

790X boards use DDR2 and have less features than the FX series....


I noticed there is a 790X, 790XT and 790FXT model from gigabyte at the egg...

$110
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

$140
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

$175
http://www.newegg.com/Product/Product.aspx?Item=N82E168...


I definitely don't require sli or crossfire capability or overclocking. I do find it interesting that from what I've read, the 955 BE can easily run at 3.8GHz just by raising the multiplier alone, with air cooling. I may change my mind on the OC, but even if I did, I wouldn't do more than that.

-- MaSoP
August 7, 2009 7:26:21 PM

OvrClkr said:
FX is considered AMD's "FLAGSHIP" board and normally it comes with more than 2 PCI-E slots for massive GPU firepower......

If you are not a hard-core gamer that normally HAS to have more than 2 video cards then the 790XT is more than enough.....

790X boards use DDR2 and have less features than the FX series....


The cheapest configuration I can throw together on the egg comes to just under $610 shipped for mb, cpu, mem and gpu. I think I'm going to save some money and buy myself some more time by getting a 9950 be (125w) and a 4870 1gb together for $280 shipped. That will cost less than half of a full upgrade cost and should give me another 2-3 years on the life of my system before a major overhaul is needed.

-- MaSoP
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August 7, 2009 7:27:21 PM

Exactly, so in all if you want a superb board that is fairly furture-proof you cannot go wrong with the XT.....

With the correct settings on the XT you will be able to overclock beyond 4Ghz if needed... I am buying the XT maybe today or next friday, depending on how much cash I will have to spend....

This is what I have in my cart at the moment :

GIGABYTE GA-MA790XT-UD4P AM3 DDR3 AMD 790X ATX AMD Motherboard
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

mushkin XP 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Dual Channel Kit Desktop Memory
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

August 12, 2009 11:19:31 PM

Will the GIGABYTE GA-MA790FXT-UD5P DDR3 790FX board support triple channel? I see it lists dual channel. I plan on running XP Pro SP3 for another 6-12 months before moving to Windows 7.
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August 12, 2009 11:37:49 PM

Triple-Channel does not exist for AMD.. Only boards that support triple-channel are the x58's (i7's).
!