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expiredCrazyHorse posted Dec 19, 2024 03:27 PM
expiredCrazyHorse posted Dec 19, 2024 03:27 PM

Patriot Memory Viper Venom 64GB (2 x 32GB) 288-Pin PC RAM DDR5 6400 CL 32 $135

$135

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Newegg [newegg.com] has the Patriot Memory Viper Venom 64GB (2 x 32GB) 288-Pin PC RAM DDR5 6400 (PC5 51200) Desktop Memory Model PVV564G640C32K for $135

DDR5 6400 (PC5 51200)
Timing 32-40-40-84
CAS Latency 32
Voltage 1.40V
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Newegg [newegg.com] has the Patriot Memory Viper Venom 64GB (2 x 32GB) 288-Pin PC RAM DDR5 6400 (PC5 51200) Desktop Memory Model PVV564G640C32K for $135

DDR5 6400 (PC5 51200)
Timing 32-40-40-84
CAS Latency 32
Voltage 1.40V

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Dec 19, 2024 04:58 PM
619 Posts
Joined Nov 2021
Dec 19, 2024 04:58 PM
BeigeRoad455
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Dec 19, 2024 04:58 PM
619 Posts

Our community has rated this post as helpful. If you agree, why not thank BeigeRoad455

This is a good deal, 64gb (2x32) ddr5 6000+ with similar timings is usually at minimum $160 on a good sale. Ddr5 6400 cl32 should be hynix memory chips (either a or m die). Keep in mind that this memory is dual rank, which is somewhat more stressful on the memory controller than single rank for overclocking, can't reach quite as high speeds as single rank when overclocked (probably won't hit 7200+ at reasonable voltages), and will run significantly hotter. This memory is only listed as supporting xmp in the specs sheet, but you can use it in an amd system without issue if you know what you're doing. If you're purchasing for an intel system the 6400 cl32 profile should work without issue. If you're purchasing for an am5 system, you may not be able to run ddr5 6400 at 1:1 (uclk=memclk) even with the maximum safe soc voltage of 1.3v, and optimal fclk for ddr5 6400 might also not be possible at 1.3v soc. On am5 you'll likely want to manually tune the memory, since expo settings may very well be unstable in 1:1 mode (most am5 motherboards will default to uclk being half of memclk at speeds over 6000). This memory doesn't have rgb, which is a plus in my opinion. Make sure to check the dimensions of this memory to ensure your cpu cooler has sufficient clearance.

Memory specs sheet: https://cdn.prod.website-files.co..._sheet.pdf

Basic am5 memory overclocking/tuning information: https://www.youtube.com/watch?v=Xcn_nvWGj7U

On am5, these are the settings I'd personally recommend as a starting point (primarily derived from buildzoid ddr5 6000 hynix fallback timings, simply taking the loosest between a or m die since I don't know which this particular memory kit is):

Ddr5 speed set to 6000
uclk div1 mode set to uclk=memclk (mclk will be 3000, uclk will be 3000)
FCLK left on auto (2000)

Voltages:
VSOC 1.25v (if you disable your igpu in bios 1.2v should be possible unless you get unlucky)
DRAM VDD 1.4v
DRAM VDDQ 1.4v
VDDIO 1.4v
VDDP 0.99v (0.95 should be easily possible, but I've heard of very rare anecdotal cases where stability suffers below 1v even at ddr5 6000)

Timings:
tCL 32 (30 easily possible)
tRCDWR 40
tRCDRD 40
tRP 40
tRAS 48 (40 should be possible, but dual rank can sometimes have issues with low tras)
tRC 88
tWR 48
tRFC 512 (if your memory gets exceptionally hot, you might want to raise to 544)
tRFC2 auto
tRFCSB auto
tREFI 40000 (if you memory stays below 60C raise to 50000, if it goes over 65C lower to 30000)
tRTP 16
tRRDL 8
tRRDS 8
tFAW 32
tWTRL 16
tWTRS 6
tRDRDSCL 4
tRDRDSC 1
tRDRDSD 6
tRDRDDD 6
tWRWRSCL 4
tWRWRSC 1
tWRWRSD 8
tWRWRDD 8
tWRRD 4
tRDWR 16

These are a basic starting point that should be perfectly stable unless you really lose the silicon lottery, but make sure to thoroughly stress test your system. Running memtest86 (free) from a flashdrive is good as an initial test to check for obvious hardware defects in all memory chips, but it's not very good at picking up errors due to overclocking. For free stress testing, at a minimum I'd recommend prime95 large ffts (4+hrs, 8+ preferred) and y-cruncher vt3 (4+hrs, 8+ preferred). For additional validation you could try occt memory and cpu+ram large dataset tests, hci memtest, and tm5 (testmem5) with 1usmus and absolut configs.
Last edited by BeigeRoad455 January 16, 2025 at 11:44 PM.
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Dec 20, 2024 02:54 PM
476 Posts
Joined Jun 2017
Dec 20, 2024 02:54 PM
CharleyWDec 20, 2024 02:54 PM
476 Posts
Quote from BeigeRoad455 :
This looks like a really good deal, 64gb (2x32) with similar timings is usually at minimum $160 on a good sale. Ddr5 6400 cl32 should be hynix memory chips (either a or m die). Keep in mind that this memory is dual rank, which is somewhat more stressful on the memory controller than single rank for overclocking. This memory is only listed as supporting xmp in the specs sheet, but you can use it in an amd system without issue if you know what you're doing. If you're purchasing for an am5 system, you may not be able to run ddr5 6400 at 1:1 (uclk=memclk) even with the maximum safe soc voltage of 1.3v, and optimal fclk for ddr5 6400 might also not be possible at 1.3v soc. On am5 you'll likely want to manually tune the memory, since expo settings may very well be unstable in 1:1 mode (most am5 motherboards will default to uclk being half of memclk at speeds over 6000). This memory doesn't have rgb, which is a plus in my opinion. Make sure to check the dimensions of this memory to ensure your cpu cooler has sufficient clearance.

Memory specs sheet: https://cdn.prod.website-files.co..._sheet.pdf [website-files.com]

Basic am5 memory overclocking/tuning information: https://www.youtube.com/watch?v=Xcn_nvWGj7U

Buildzoid am5 ddr5 6000 hynix memory timings: https://www.youtube.com/watch?v=dlYxmRcdLVw

Important notes on buildzoid timings: DDR5-6000 1:1 mode should have 2000MHz FCLK (the 2033 recommendation was due to an agesa bug), DDR5-6200 1:1 mode should have 2066MHz FCLK, DDR5-6400 1:1 mode should have 2133MHz FCLK; set mem vdd, mem vddq, and cpu vddio voltages to 1.4v instead of 1.35v (to match xmp); at ddr5 6000 for this dual rank kit I'd recommend tras of 52, trc of 92, and trfc of 550 just to be safe (you can leave trfc 2 and 3 on auto), dual rank timings can probably be set to 9 across the board with 8 being easily possible.
If you stick with ddr5 6000 (uclk 3000) and have the igpu disabled, you can probably lower soc voltage to 1.2 volts or potentially lower if you don't get really unlucky, this improves idle power consumption. You can definitely optimize the settings and timings further, this is just a general recommendation of a starting point. As always, make sure to thoroughly stress test your system.
Buildzoid used to say all the am4 Samsung b-die stuff was the same, wondering if this is the same hynix a die stuff as the 6000 cl28...
just grabbed that for 127 with the newegg sale, its on slickdeals right now still.
and just grabbed the gigabyte ultra b650i think it maxes at 6400 so figure i'll run it 6000 at cl26 and call it a day

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