Ram speed slower with ryzen 5 than it should be

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Inquisitivenoob

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May 23, 2015
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I have an Asus a320m-a (I know it can not OC my CPU), will upgrade to b350 later. Running ryzen 5 1500x and 8gb 2x4gb Patriot viper 4 3600mhz ram. In bios if set to auto my cpuz shows 1066 and if I change it to 2666 in bios my cpuz shows 1333( half of actual speed on both)

How do I fix it? Or what is causing it?
 
Solution
photonboy
In CPU-Z it should also state "Dual" to indicate Dual Channel

2x1333 = 2666

The data is SPLIT between both sticks thus you have 2x the bandwidth with one stick as you do with two.

Also, not sure how much more you would overclock with a new motherboard. Probably lucky to hit 4.0GHz so let's say you hit 3.7GHz now that's at most an 8% improvement (which may not affect what you're doing at all if the bottleneck is elsewhere).
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photonboy

photonboy

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In CPU-Z it should also state "Dual" to indicate Dual Channel

2x1333 = 2666

The data is SPLIT between both sticks thus you have 2x the bandwidth with one stick as you do with two.

Also, not sure how much more you would overclock with a new motherboard. Probably lucky to hit 4.0GHz so let's say you hit 3.7GHz now that's at most an 8% improvement (which may not affect what you're doing at all if the bottleneck is elsewhere).
 
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Solution
Vic 40

Vic 40

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With that ram would i try that.You can always go back to 2666mhz if it doesn't run or isn't stable.
 
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Karadjgne

Karadjgne

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Well, as you stated, you have a non OC supported mobo. Generally when you see (OC) next to ram it means one of two things, depending on your point of view. Either the ram will need some slight cpu OC to bump up ability of the memory controller to handle the faster speed (and remain stable) or you can manually OC ram to those limits by bumping sa agent, vram voltage, timings adjustments etc.

Either way, it's kind of a moot point, most non-OC mobo's only support default ram speeds, be it 1333/1600 or 2133 or 2133/2400 or 2666. Until you can replace the mobo with the B250, messing with ram speeds isn't going to get you much other than frustrated.
 
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Vic 40

Vic 40

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The 2800 is nice,don't know what timings though. Maybe future bios updates can give more ,but right now just settle for that.If possible and/or if necessary could you bump the SOC voltage abit,but don't go over 1.2V ,maybe this might help with higher speeds . Loosening timings is also something to look at if possible (haven't checked the manual for that board).

If the motherboard says 3200mhz possible under specs should that be possible,but with Ryzen it's still not always able to get there. Imo is the "OC" part in this case meant for the ram where the cpu can't be overclocked on this motherboard.The 2666mhz is what the cpu officially is rated for,so getting 3200mhz to work means an "overclock". Since the ram is rated for 3600mhz imo not really an overclock.

The B250 motherboard mentioned above is a typo. ;)
 
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