dual channel memory not working with athlon II x 4 645

Microsoft Windows 7 home premium
March 29, 2012 at 16:07:54
Specs: Windows 7, athlon II x 4 645/ 8gb ddr3
my gaming rig has a gigabyte 990fxa-ud3 motherboard. i was running a phenom II x 4 970 quad core cpu. i took off the cooler to check the thermal compound and somehow bent some pins. so, in put in an athlon quad core. when booting up i get 3 long beeps and i know thats memory. does this processor support dual channel? all 4 slots are black on this board. i had a stick in the first and third slot when i got the beeps. i found that i could run both sticks in the first 2 slots and get 8gb, but cpuz says its running in single channel. i have it set to ddr3 1600 in the bios, and cpuz shows that, but in single channel mode. the memory is kingston hyperx ddr3 1600. i am using the first 2 slots closest to the cpu, but cpuz, says that is slot 1 and 3. i couldnt find anything on the amd website. thanks in advance

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#1
March 29, 2012 at 17:01:11
"i took off the cooler to check the thermal compound and somehow bent some pins"

I'll never understand why people do this. As soon as you break the thermal bond, the paste is ruined & needs to be completely removed & replaced. I'm guessing you didn't power up the PC & get the CPU up to operating temp before removing th heatsink? If you do it cold, the CPU often sticks to the heatsink & ends up getting yanked out of the socket. If you warm it up 1st, all you need to do is give the heatsink a little twist & it'll pop right off. If you didn't break the pins off the CPU, all you had to do was straighten them & re-use it.

According to the manual: "For op-timum performance, when enabling Dual Channel mode with two memory modules, we recommend that you install them in the DDR3_1 and DDR3_2 sockets"

"i am using the first 2 slots closest to the cpu, but cpuz, says that is slot 1 and 3"

That IS slots 1 & 3. Actually, you're using slots 2 & 4. Going from the edge of the board toward the CPU, the slots are numbered 1-3-2-4 or if you prefer, from the CPU toward the edge of the board the order is 4-2-3-1. So you should be using the 2nd slot from the CPU & the farthest slot.


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#2
March 29, 2012 at 18:58:36
thanks anyway.

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#3
March 30, 2012 at 04:56:00
See correction I made to the last paragraph in my other response.

Just to add, ALL modern CPUs support dual channel mode, but it only kicks in when the RAM is installed in the correct slots. You're RAM is running in single channel mode because you have it in the wrong slots. I suggest you read your motherboard manual. And if you're not running the latest BIOS, you might wanna consider updating.

http://www.gigabyte.com/products/pr...


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Related Solutions

#4
March 30, 2012 at 13:37:31
it was running just fine with the phenom. i had 2 sticks in the first (closest to cpu) and third slot. it would also run in the 2nd and 4th slot. when i put in the athlon it would not boot . the only way it will run now with 2 sticks, is in the first and second slots. and yes i have read the manual. i am beginning to think the 3rd and 4th slots have died. i will try to boot using only 1 stick in each slot to verify.

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#5
March 30, 2012 at 14:48:17
its confirmed, the 3rd and 4th slots are dead. i used each stick seperately and get no boot in those slots.

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#6
March 31, 2012 at 07:00:37
You didn't comment on how you "broke" the Phenom. No offense, but removing the CPU to check the thermal paste was a really dumb move. All you had to do was check the temperature reading in the BIOS. If the temp is good, the paste/heatsink are good...if the temp is unreasonably high, there's a problem with the paste and/or heatsink installation.

Did you try straightening the pins on the Phenom & reusing it? Or did you actually break some pins off?


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#7
March 31, 2012 at 17:35:34
thanks for your help but i got some help from another website. i know people answer questions on a volunteer basis, but i just dont feel like being beaten down to get tech support.

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#8
April 1, 2012 at 09:49:13
Unfortunately, none of the other helpers got involved in this thread. I asked legitimate questions about the damage to the Phenom. They were not meant as a beat down, they were asked for clarification, but you ignored them. I still don't know if the pins were just bent or if they were broken off. And if they were simply bent, I don't know if you tried to straighten them or not, & if not, why not? If the pins were not broken, there's no reason why the Phenom won't still work.

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#9
April 1, 2012 at 10:19:02
reading this post again and again i understood that u bent the phenoms pins and replaced it with an athlon quad core, what athlon quad core ?
not all athlon's support dual channel not in the way ur putting them that is.
the memory should be placed in 1 and 3 or 2 and 4 channel
what u could do is try to fix the phenoms pins and try to put it back.
the question is how could the 3rd and 4th channels be dead while they were working fine the older cpu in place
I did not interfere in this thread because riider does not need help, he is a pro and knows how to solve issues just like everyone would have done he asked u questions and u did not answer them all

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#10
April 1, 2012 at 13:04:32
i dont know what else to say. when you call someone dumb, doesnt help the situation at all. im sorry to have made this post.

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