[SOLVED] why cant i change my ram speed?

Feb 12, 2021
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ive tried changing my ram speed manually in bios and by doing the xmp way but my ram speed is still at 2133 no matter what i do. (im somewhat new still to pc stuff) in bios it shows the correct timings that are on the ram sticks and it shows the correct timings in cpu z. im just trying to get my ram speed to 2933.

mb - asrock b450m/ac
cpu - ryzen 5 2600
ram - G. skill ripjaws V series 32 gb (4x8 gb) ddr4-3000 cl15
 
Solution
ive tried changing my ram speed manually in bios and by doing the xmp way but my ram speed is still at 2133 no matter what i do. (im somewhat new still to pc stuff) in bios it shows the correct timings that are on the ram sticks and it shows the correct timings in cpu z. im just trying to get my ram speed to 2933.

mb - asrock b450m/ac
cpu - ryzen 5 2600
ram - G. skill ripjaws V series 32 gb (4x8 gb) ddr4-3000 cl15
You may have to manually set the cas latency to 16 if the motherboard is not setting it to CL16 when using XMP. The ram kit you bought was intended for Intel platforms, but Ryzen can still use that ram with the advertised timings, but with an even cas latency or with gear down mode disabled for odd cas latency.

If...
ive tried changing my ram speed manually in bios and by doing the xmp way but my ram speed is still at 2133 no matter what i do. (im somewhat new still to pc stuff) in bios it shows the correct timings that are on the ram sticks and it shows the correct timings in cpu z. im just trying to get my ram speed to 2933.

mb - asrock b450m/ac
cpu - ryzen 5 2600
ram - G. skill ripjaws V series 32 gb (4x8 gb) ddr4-3000 cl15
You may have to manually set the cas latency to 16 if the motherboard is not setting it to CL16 when using XMP. The ram kit you bought was intended for Intel platforms, but Ryzen can still use that ram with the advertised timings, but with an even cas latency or with gear down mode disabled for odd cas latency.

If you bought the ram as two different kits, it may not work properly at 2933/3000 and may have to be dropped to 2666 CL14 or tweak more settings. If you can return the ram, get ram that is designed for AMD Ryzen or is spec'ed with an even cas latency like CL16. Keep in mind that Ryzen 2000 on cheaper motherboards have trouble running above 2933/3000 with 4x8GB or 2x16GB and higher capacities.
 
Solution
Read the specs for your motherboard.
Here is the QVL list for your motherboard and your 2000 series processor.
The ram speed supported will also be determined by your processor:
https://www.asrock.com/mb/AMD/B450Mac/#MemoryPR

Also, the number of ram slots may have an impact. 4 slots is more restricted than 2.
I see no g.skil kits on the supported list for 4 slots and your processor that exceed 2400 speed.

You possibly could make some headway by increasing the ram voltage past stock.
 
Last edited:
Feb 12, 2021
2
0
10
You may have to manually set the cas latency to 16 if the motherboard is not setting it to CL16 when using XMP. The ram kit you bought was intended for Intel platforms, but Ryzen can still use that ram with the advertised timings, but with an even cas latency or with gear down mode disabled for odd cas latency.

If you bought the ram as two different kits, it may not work properly at 2933/3000 and may have to be dropped to 2666 CL14 or tweak more settings. If you can return the ram, get ram that is designed for AMD Ryzen or is spec'ed with an even cas latency like CL16. Keep in mind that Ryzen 2000 on cheaper motherboards have trouble running above 2933/3000 with 4x8GB or 2x16GB and higher capacities.
You may have to manually set the cas latency to 16 if the motherboard is not setting it to CL16 when using XMP. The ram kit you bought was intended for Intel platforms, but Ryzen can still use that ram with the advertised timings, but with an even cas latency or with gear down mode disabled for odd cas latency.

If you bought the ram as two different kits, it may not work properly at 2933/3000 and may have to be dropped to 2666 CL14 or tweak more settings. If you can return the ram, get ram that is designed for AMD Ryzen or is spec'ed with an even cas latency like CL16. Keep in mind that Ryzen 2000 on cheaper motherboards have trouble running above 2933/3000 with 4x8GB or 2x16GB and higher capacities.
i bought it in a 4x8gb kit. and i didnt know it was for intel systems. but i just found out that my system will run this ram at 2400, so i guess im happy with that. and thanks for your help.