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Went from 6GB to 8GB, only recognizes 4GB dual channel.

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March 8, 2012 2:14:14 PM

O k guys. I recent upgraded my RAM from 6GB to 8GB so I could run dual channeling, however when I installed my new RAM it only recognized 4gb.

-Bios has been flashed
-RAM is known to be working
-All four 2GB ram sticks are 100% matches.
-Reseated several times
-ASUS M4a785td-m evo MOBO
-Corsair tx750v2 PSU (overkill for my setup)



March 8, 2012 2:30:41 PM

how much ram do you see in bios
a b } Memory
March 8, 2012 2:33:13 PM

What Win7 OS version, 32-bit or 64-bit?
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March 8, 2012 2:34:56 PM

Windows 7 64 bit, 4gb ram in bios.
a b } Memory
March 8, 2012 2:43:47 PM

I would start by inserting one stick at a time into the first socket. If all four are recognized, then I would add the second slot making sure I was using the slots in correct order. Rinse and repeat checking the amount of ram shown at each reboot. Also make sure your bios setting are correct by setting the timings manually. When installing the memory, from what your saying, you can detect if loading the blue slots. Try loading only the black. Re-install the chip set drivers with the latest version.
March 8, 2012 3:25:10 PM

If the ram is "known good", and you did your due diligence with bios updates, making sure its seated right, the next thing i would question are your ram slots on the motherboard.

Check your ram one more time by booting up with only 1 stick in the first slot - do this to all 4 stciks. If you see 2 gigs every time, its pretty much for sure that you have a bad ram slot.

You can find which one by adding an extra stick each reboot - the slot that does not give you an extra 2 gigs - thats the bad one.
March 8, 2012 4:12:47 PM

http://www.asus.com/Motherboards/AMD_AM3/M4A785TDM_EVO/
You can see my Mobo there, Previously I had three 2GB ram sticks in the blue and 1 in the first black slot.

Lets say my 4th dimm slot is busted, could it recognize that I am trying to dual channel the ram but the busted slot wont let either stick work since it is dual, where as before I had 6GB in 3 dimm slots?
a b } Memory
March 8, 2012 4:53:02 PM

Not usually. You should be able to see a single 2 g in any slot. Thats why I suggested trying a good stick in each slot.
a c 346 } Memory
March 8, 2012 5:31:08 PM

Looking at your second image, my assumption is you confused '2GB' kits with 2GB per stick i.e. 4GB kits.

Please provide a link(s) to your EXACT kit(s) and an image of CPU-z 'SPD' tab; see example below:
March 8, 2012 6:04:07 PM

My newer RAM (date purchased newer), is pc10600 not the pc10700 my cpuz program is reporting. Could the speed be causing this?

Best solution

a c 346 } Memory
March 8, 2012 6:08:16 PM
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As I suspected, you have 4x1GB (4GB) in total; per your link "Pieces/Unit: 2 (Two 1GB modules, totaling 2GB)

Pay the 10%~15% restocking fee and get an 8GB 2x4GB kit.

Cheap 2x4GB (8GB) Kits - http://www.newegg.com/Product/Productcompare.aspx?Submi...
March 8, 2012 6:09:48 PM

Gonna crack her open and take a look and see if I misread something.
a c 346 } Memory
March 8, 2012 6:13:03 PM

Happens...
a b } Memory
March 8, 2012 6:18:53 PM

bloodhound50 said:
Gonna crack her open and take a look and see if I misread something.

You can't just match brand, size and speed and call it a dual channel kit. You're just asking for problems if you do.

Actual multi-channel kits are paired up by the manufacturer to be sure they operate within tight tolerances of each other. If you didn't buy a pair of sticks at the same time that were labeled as a dual channel kit, you do not have a dual channel kit.
March 8, 2012 6:24:16 PM

O k, thank you for the clarification. I had one 4GB stick, and two 1GB sticks previously. I accidently bought the same thing again, when I meant to get two 2GB sticks. Now I have 7GB RAM installed and cpu-z says "Channels # DUAL".

So I will look at kits that are specifically mentioned to be for dual channeling. Thanks for all the quick and helpful replies.
a c 346 } Memory
March 8, 2012 6:28:23 PM

You 'can' run 2x4GB + 2x1GB or (10GB), but 1x4GB + 3x1GB (7GB) is not 'Dual Channel' regardless of what CPU-z says. Dual Channel requires the same size per Channel.

Frankly, with DDR3 RAM it's not a big difference so do what 'you' feel is best.

Good Luck!
March 8, 2012 6:58:39 PM

bloodhound50 said:
I am looking into buying this:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Is the Hyper-x type main advantage is programmable overclocking and higher voltages?


HyperX just refers to it being their performance line of memory. WYSIWYG. Don't bother overclocking your memory, it does next to nothing except increase temps and lowers stability. This is especially true if you are a less experienced overclocker.
March 8, 2012 6:59:32 PM

bloodhound50 said:
I am looking into buying this:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Is the Hyper-x type main advantage is programmable overclocking and higher voltages?

It also has the heat-spreaders to aid in heat dissipation.

In a nutshell, HyperX is the name Kingston gave to their high performance/gaming line of memory modules. Other companies' (Patriot, Corsair, GSkill, Geil, etc.) high performance lines are not split off as much on Newegg's website.
March 8, 2012 7:05:06 PM

Isaiah4110 said:
It also has the heat-spreaders to aid in heat dissipation.

In a nutshell, HyperX is the name Kingston gave to their high performance/gaming line of memory modules. Other companies' (Patriot, Corsair, GSkill, Geil, etc.) high performance lines are not split off as much on Newegg's website.


Heat spreaders have been proven to hurt heat dissipation in many cases. They are almost 100% aesthetic now.
a c 346 } Memory
March 8, 2012 7:22:11 PM

First, DDR3-1600 is fine you'll need to either: 1. AI OC Tuner -> DOCP and use a DRAM OC Profile, or FSB -> 240HMz and adjust the CPU Multiplier/Ratio, or 3. CPU-NB Frequency -> 2400MHz. However, that's primarily for the AMD Phenom x4/x6 family. An AMD Athlon isn't the best choice with DDR3-1600,and the added instability isn't worth the fractional gains.

The RAM I posted are all 1.50v DDR3-1333 and will work easily and are 'plug 'n play.'

If you want something faster the DDR3-1333 CAS 7 RAM, I added (2) kits F3-10666CL7D-8GBXH & F3-10666CL7D-8GBRH - http://www.newegg.com/Product/Productcompare.aspx?Submi...|20-139-075^20-139-075-TS,20-231-424^20-231-424-TS,20-231-422^20-231-422-TS&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-RSSDailyDeals-_-na-_-na&AID=10521304&PID=4176827&SID=csepq17tnuqu
March 8, 2012 7:27:46 PM

jaquith said:
First, DDR3-1600 is fine you'll need to either: 1. AI OC Tuner -> DOCP and use a DRAM OC Profile, or FSB -> 240HMz and adjust the CPU Multiplier/Ratio, or 3. CPU-NB Frequency -> 2400MHz. However, that's primarily for the AMD Phenom x4/x6 family. An AMD Athlon isn't the best choice with DDR3-1600,and the added instability isn't worth the fractional gains.

The RAM I posted are all 1.50v DDR3-1333 and will work easily and are 'plug 'n play.'

If you want something faster the DDR3-1333 CAS 7 RAM, I added (2) kits F3-10666CL7D-8GBXH & F3-10666CL7D-8GBRH - http://www.newegg.com/Product/Productcompare.aspx?Submi...|20-139-075^20-139-075-TS,20-231-424^20-231-424-TS,20-231-422^20-231-422-TS&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-RSSDailyDeals-_-na-_-na&AID=10521304&PID=4176827&SID=csepq17tnuqu


That motherboard isn't natively compatible with 1600MHz ram, as Jaq is saying. I would just stick to a 1333MHz kit any not worry about it. However, I didn't see any CAS 7 kits on your compare list, only 3 CAS 9 kits.
March 9, 2012 1:30:47 AM

I take it G.Skill is a reputable name?
a c 346 } Memory
March 9, 2012 10:39:11 AM

Correct, G.SKILL, Corsair, Mushkin, Kingston, and Crucial. Also Patriot Memory seems to have corrected whatever issues I saw in the past and over the past year have a low failure rate; AMD is using Patriot Memory as a re-brand.
a b } Memory
March 9, 2012 2:42:22 PM

jaquith said:
Correct, G.SKILL, Corsair, Mushkin, Kingston, and Crucial. Also Patriot Memory seems to have corrected whatever issues I saw in the past and over the past year have a low failure rate; AMD is using Patriot Memory as a re-brand.

I'm still avoiding Patriot. I bought a couple of their kits that were highly intolerant to overclocking. My old G.SKILL DDR2-800 kit happily ran at 1000+, but the Patriot kits became unstable with as little as a 50 MHz overclock.

Less of an issue now that memory overclocking is much less common, but I've just found G.SKILL to be equal or better quality at a lower price.
March 9, 2012 3:32:57 PM

Thanks for the insight, I think I will get two 4gb sticks in that dual channel kit linked above of G.SKILL
a c 346 } Memory
March 9, 2012 3:39:35 PM

Kingston and Crucial from above are the only companies that produce their own IC's, the remainders e.g. G.SKILL, Corsair, and Mushkin 'pick' the IC's and produce the PCB/sink and assemble.

It entirely depends on line of kits; example Corsair Vengeance = poor OC (above rated), Dominator's = great OC, and ditto with any Mfg including G.SKILL.
March 10, 2012 1:46:50 AM

Am I more likely to get a re-marked chip with the companies that don't produce their own IC's?
March 10, 2012 5:45:03 AM

G Skill seems to be the economical brand of choice. If Crucial is on sale, I like their stuff. It seems to overclock pretty well depending on what model kit you get. I have Corsair in my rig right now. But, I've had dual channel kits with a DOA stick in them from Corsair. I would just stay away from the generic brands.
a c 346 } Memory
March 10, 2012 10:09:47 AM

In your case it really doesn't matter, I seriously doubt you're going to buy DDR3-1333 and try to OC the RAM to DDR3-1866 or faster. The Brands I already listed are all good.

Further, I don't recommend mix-matching RAM: Brands, Lines of Brands, Density (GB), Frequency, CAS Timings, nor especially ever Voltage. In other words, the 'ideal' choice is to buy a Fully Matched Set; least chances of any problems.
a b } Memory
March 10, 2012 12:41:40 PM

You might also be aware that if you plan to O.C., the few slots filled the better. If you want 8g of ram, buy a 2x4 kit. If need be you can probably sell your other sticks on ebay.
March 11, 2012 3:45:11 AM

Because it generates less heat?
a b } Memory
March 11, 2012 4:40:43 AM

No because fewer modules for the MB to maintain voltage regulation, timing on and better matching of sticks.
March 11, 2012 7:40:21 AM

There is no point in OCing ddr3 memory. When you get up to 1333mhz, Ocing wont be noticed. If you want OC'd memory get 2000mhz+ memory. But to manually adjust timing and voltage on current memory is just asking for trouble.
March 11, 2012 7:43:58 AM

aviconus said:
There is no point in OCing ddr3 memory. When you get up to 1333mhz, Ocing wont be noticed. If you want OC'd memory get 2000mhz+ memory. But to manually adjust timing and voltage on current memory is just asking for trouble.


On an Intel rig, the point is not that OCing won't be noticed, but the lack of tangible performance gains above 1333MHz in general. Purchasing 2000MHz memory will not get you around that fact. It will have zero performance benefit and cost you quite a bit more dosh.
March 11, 2012 10:47:23 AM

Not really. Memory overall is pretty cheap.
March 25, 2012 10:59:34 PM

Best answer selected by Bloodhound50.
a c 146 } Memory
March 26, 2012 6:52:50 PM

This topic has been closed by Nikorr
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