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CMD32GX4M2C3200C16 overclock 3600


jonedeuf64

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Hi everyone,

Thanks to A Computer Guy i managed to set 3600Mhz stable with my ram

 

The presets given here : https://forum.corsair.com/v3/showthread.php?t=187175&page=2 were good for Memtest64 , no errors after 4 pass but make windows 10 unstable, rebooting with no BSOD.

 

Here are my settings, stable ingame, running Farcry 5 and Horizon Zero Dawn Benchmarks with no errors:

 

CMW32GX4M2C3200C16 (ver 4.32)

DDR4-3600

18 - tCL

19 - tRCD

20 - tRP

42 - tRAS

62 - tRC

6 - tRRDS

9 - tRRDL

32 - tFAW

4 - tWTRS

12 - tWTRL

12 - tWR

4 - tRDRDSCL

4 - tWRWRSCL

496 - tRFC

18 - tCWL

6 - tRTP

8 - tRDWR

3 - tWRRD

1 - tWRWRSC

7 - tWRWRSD

6 - tWRWRDD

1 - tRDRDSC

5 - tRDRDSD

4 - tRDRDDD

0 - tCKE

 

DRAM = 1.35v

SOC = 1.025v override mode

Gear Down Mode = Disabled

Power Down Mode = Disabled

Spread Spectrum Disabled

ProcODT = 60 ohms

RTT_NOM = Disabled

RTT_WR = RZQ/3(80)

RTT_PARK = RZQ/1(240)

CAD_BUS = All 24 ohms

Edited by jonedeuf64
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Hi everyone,

Thanks to A Computer Guy i managed to set 3600Mhz stable with my ram

 

...trimmed quote...

 

Nice! With GD disabled are you running CR at 1T or 2T?

 

Since then I found it's behaving as samsung c-die and interestingly less voltage can be more stable for a higher overclock.

 

Thanks to DirtyHarry in thread https://forum.corsair.com/v3/showthread.php?t=199955 for finding this helpful overclocking thread

Samsung 8Gbit DDR4 C-Die K4A8G085WC - OC results...

 

First try (a little unstable, pending adjustments)

DRAM=1.33v, SOC=1.025 +(SOC-LLC=L1) >> 1.2v

20-22-22-48-68 1T GDM tRFC=630 (AUTO on the rest)

DDR4-3733 106% https://www.userbenchmark.com/UserRun/33147352

DDR4-3800 107% https://www.userbenchmark.com/UserRun/33148103

 

My new B550 ITX motherboard has much better VRM and voltage control than my x470, but by default tends to juice the SOC a bit above 1.2v, and it took a bit to figure out where the right control was to bring it back down.

 

Here is what I am currently playing with ...

 

with ASRock B550 Phantom Gaming ITX

CMW32GX4M2C3200C16 (ver 4.32, dual rank, 2 sticks, 32GB)

DDR4-3800

20 - tCL

21 - tRCD

21 - tRP

48 - tRAS

68 - tRC

6 - tRRDS

9 - tRRDL

36 - tFAW

4 - tWTRS (last stable at 5)

12 - tWTRL (last stable at 14)

12 - tWR (last stable at 26)

4 - tRDRDSCL (last stable at 6)

4 - tWRWRSCL (last stable at 6)

590 - tRFC

18 - tCWL

6 - tRTP (last stable at 14)

8 - tRDWR (last stable at 12)

3 - tWRRD (last stable at 8)

2 - tWRWRSC (needed 2 to pass 128bit random number generation but this kills performance a bit)

6 - tWRWRSD

6 - tWRWRDD

2 - tRDRDSC (needed 2 to pass 128bit random number generation but this kills performance a bit)

4 - tRDRDSD

4 - tRDRDDD

2 - tCKE

 

FCLK 1900 (keeping 1:1 ratio)

DRAM = 1.33v

SOC = 1.025v override mode

CR = 1T

Gear Down Mode = Enabled

Power Down Mode = Disabled

Spread Spectrum Enabled

ProcODT = 36.9 ohms (I think with newer BIOS Zen2 CPU prefers lower ohms...I forgot how I landed at this value exactly)

RTT_NOM = Disabled

RTT_WR = RZQ/3(80)

RTT_PARK = RZQ/1(240)

CAD_BUS = All 24 ohms

 

Even though I can FCLK my 3800x to 1900Mhz it's probably at the bleeding edge of stability. I'm not sure if what other voltage controls may help improve the sub timings.

Edited by A Computer Guy
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Thank you for your post very interesting.

 

I'm running CR at 1T

Here is results : https://www.userbenchmark.com/UserRun/34174266

 

My CPU is not oveclocked, i thought it was not really interesting to overclock Ryzen 7 3700 but after a quick look to the thread i will try the 1900 ...

I've got a stock fan for my Ryzen . Overclock might be difficult, wait , burn and see :laughing:

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