Hi guys and girls,
Strange issue here. CPU-Z shows the incorrect BCLK/DRAM Frequency.
Before anyone says anything, I understand that CPU-Z only reads half the effective memory.
Rig:
ASUS x99 Deluxe
i7-5820k
Corsair HX1000i PSU
Geforce GTX 1080
Crucial Ballistix Sport DDR4 2400 4 x 4gb
The problem is with the ratio and memory multi.
BLCK is manually set to 100 in BIOS, BCLK/DRAM Frequency manually set to 100:100.
So CPU-Z should show a DRAM Frequency of 1200mhz, and a BCLK/DRAM Frequency of 1:12, but it doesn't ?
It shows the correct base frequency (1200), but the ratio is 1:24 indicating that my BCLK is incorrectly set at 50mhz.
I have confirmed this in HWINFO, which actually shows the full base clock (1200 = 24 x 50mhz), showing the same issue as CPU-Z.
I also know this is incorrect because I have seen plenty of other people's DDR4 CPU-Z Memory tabs and they all show half the ratio I have, at the same settings.
CPU-Z says this for memory, in the Timings section:
DRAM Frequency: 1199.7mhz (all good)
FSB/DRAM 1:24 (this indicates my BCLK is actually set to 50mhz, not good)
Latencies settings are fine.
I have checked to confirm BCLK is definitely 100 in BIOS.
And I have massive latency issues in AIDA testing and visibly.
I have reflashed the latest BIOS, cleared CMOS, reinstalled Windows to confirm that none of them were the cause. The RAM has also passed MemTest86, full runs at both 2400 and 2666, so it's not the issue.
I have also tried running the RAM at BCLK/DRAM Frequency 100:133, in which CPU-Z changes my ratio to 1:18 which still indicates that my BCLK is at half (66.67mhz).
Can someone please advise.
Many thanks.
EDIT: It appears I may be a first class idiot. From what I can ascertain, while single channel and dual channel DIMM setups will show the full BCLK passed down to the DRAM Frequency in reporting software like CPU-Z and HWINFO, quad channel however appears to only display half the BCLK.
e.g.
2400mhz RAM, BCLK 100:
Single channel - 1200 = 12 x 100mhz
Dual channel - 1200 = 12 x 100mhz
Quad channel - 1200 = 24 x 50mhz
2400mhz RAM, BCLK 133 (or ratio 100:133)
Single channel - 1200 = 9 x 133mhz
Dual channel - 1200 = 9 x 133mhz
Quad channel - 1200 = 18 x 66.7mhz
Even though BIOS settings remain the same for all 3 setups.
Was going to delete this post, but it may come in handy for anyone else running quad channel who is having trouble interpreting memory reporting.
If I am incorrect, PLEASE correct me.
Thanks.
Strange issue here. CPU-Z shows the incorrect BCLK/DRAM Frequency.
Before anyone says anything, I understand that CPU-Z only reads half the effective memory.
Rig:
ASUS x99 Deluxe
i7-5820k
Corsair HX1000i PSU
Geforce GTX 1080
Crucial Ballistix Sport DDR4 2400 4 x 4gb
The problem is with the ratio and memory multi.
BLCK is manually set to 100 in BIOS, BCLK/DRAM Frequency manually set to 100:100.
So CPU-Z should show a DRAM Frequency of 1200mhz, and a BCLK/DRAM Frequency of 1:12, but it doesn't ?
It shows the correct base frequency (1200), but the ratio is 1:24 indicating that my BCLK is incorrectly set at 50mhz.
I have confirmed this in HWINFO, which actually shows the full base clock (1200 = 24 x 50mhz), showing the same issue as CPU-Z.
I also know this is incorrect because I have seen plenty of other people's DDR4 CPU-Z Memory tabs and they all show half the ratio I have, at the same settings.
CPU-Z says this for memory, in the Timings section:
DRAM Frequency: 1199.7mhz (all good)
FSB/DRAM 1:24 (this indicates my BCLK is actually set to 50mhz, not good)
Latencies settings are fine.
I have checked to confirm BCLK is definitely 100 in BIOS.
And I have massive latency issues in AIDA testing and visibly.
I have reflashed the latest BIOS, cleared CMOS, reinstalled Windows to confirm that none of them were the cause. The RAM has also passed MemTest86, full runs at both 2400 and 2666, so it's not the issue.
I have also tried running the RAM at BCLK/DRAM Frequency 100:133, in which CPU-Z changes my ratio to 1:18 which still indicates that my BCLK is at half (66.67mhz).
Can someone please advise.
Many thanks.
EDIT: It appears I may be a first class idiot. From what I can ascertain, while single channel and dual channel DIMM setups will show the full BCLK passed down to the DRAM Frequency in reporting software like CPU-Z and HWINFO, quad channel however appears to only display half the BCLK.
e.g.
2400mhz RAM, BCLK 100:
Single channel - 1200 = 12 x 100mhz
Dual channel - 1200 = 12 x 100mhz
Quad channel - 1200 = 24 x 50mhz
2400mhz RAM, BCLK 133 (or ratio 100:133)
Single channel - 1200 = 9 x 133mhz
Dual channel - 1200 = 9 x 133mhz
Quad channel - 1200 = 18 x 66.7mhz
Even though BIOS settings remain the same for all 3 setups.
Was going to delete this post, but it may come in handy for anyone else running quad channel who is having trouble interpreting memory reporting.
If I am incorrect, PLEASE correct me.
Thanks.
Last edited: