Is it safe to run ddr2 1066mhz cl-5 at 800mhz but timing of cl-4?

yoavain · Jan 25, 2013, 10:10 PM

I used to have 2x2GB PC2 6400 DDR2 cl-4 4-4-3-15 (OCZ)
I replaced them with 4x2GB PC2 8500 DDR2 1066mhz cl-5 5-5-5-18 (Kingston)

My motherboard supports only 800mhz (Asus striker extreme, nvidia 680i chipset).

If I run the new memory at 800mhz, can I also assume they will work as 4-4-4-15?

[Ion] · Jan 25, 2013, 10:12 PM

Quote:

Originally Posted by yoavain

I used to have 2x2GB PC2 6400 DDR2 cl-4 4-4-3-15 (OCZ)
I replaced them with 4x2GB PC2 8500 DDR2 1066mhz cl-5 5-5-5-18 (Kingston)

My motherboard supports only 800mhz (Asus striker extreme, nvidia 680i chipset).

If I run the new memory at 800mhz, can I also assume they will work as 4-4-4-15?

There is a very high chance it will work--usually memory can be underclocked a bit and the timings tightened up. But I'd run Memtest on it just to make sure

Arctucas · Jan 25, 2013, 10:21 PM

Quote:

Originally Posted by yoavain

I used to have 2x2GB PC2 6400 DDR2 cl-4 4-4-3-15 (OCZ)
I replaced them with 4x2GB PC2 8500 DDR2 1066mhz cl-5 5-5-5-18 (Kingston)

My motherboard supports only 800mhz (Asus striker extreme, nvidia 680i chipset).

If I run the new memory at 800mhz, can I also assume they will work as 4-4-4-15?

I ran my Mushkin 1066 DDR2 @ 900 on my old Striker Extreme.

Beertintedgoggles · Jan 25, 2013, 10:23 PM

I've actually tried to go the other way with a 2x2GB kit I just bought off ebay. DDR2 4-4-4-12 @ 800 (PNY XLR8). I can get them to 1050 5-5-5-15 @ stock volts (2V). I tried 1066 at those timings too but wouldn't post so I just kept it at stock volts and 1050. Long story short, if your RAM behaves close to the same way mine did I would be optimistic that it will work at CAS4 at 800.

Arctucas · Jan 26, 2013, 12:45 AM

An old screenshot I found:

Jan 25, 2013, 10:10 PM	#1
yoavain Join Date: Jan 2013 Posts: 1 (0.01/day) Thanks: 1 Thanked 0 Times in 0 Posts	Is it safe to run ddr2 1066mhz cl-5 at 800mhz but timing of cl-4? I used to have 2x2GB PC2 6400 DDR2 cl-4 4-4-3-15 (OCZ) I replaced them with 4x2GB PC2 8500 DDR2 1066mhz cl-5 5-5-5-18 (Kingston) My motherboard supports only 800mhz (Asus striker extreme, nvidia 680i chipset). If I run the new memory at 800mhz, can I also assume they will work as 4-4-4-15?

System Name:	Peenemunde/Salzburg/Osnabruck/Rostock/
Processor:	i7-860 @ 2.9GHz / i7-2700k @ 4.4GHz / i7-920 @ 3.83GHz / Core i3-2100
Motherboard:	Asus Maximus III Gene / Asus Maximus IV Gene / EVGA X58 SLI / Asus P8H77-I
Cooling:	Xigmatek Gaia / Xigmatek Gaia / Antec H2O-620 / Stock
Memory:	4x2GB G.SKILL / 2x4GB Crucial / 1x2GB Corsair / 2x4GB G.SKILL
Video Card:	Powercolor HD7930 / PNY GTX470 + nV GTX470 SLI / 3x MSI Radeon HD7770 GHz Edition / Sapphire HD7950
Hard Disk:	Western Digital 320GB / Western Digital 320GB / Western Digital 250GB / 320GB
Optical Drive:	None
CRT/LCD Model:	Asus VH242H (23.6")
Case:	None / NZXT Source 210 / NZXT Source 210 / Cooler Master Elite 120
Sound Card:	Onboard
PSU:	Antec TruePower New 650w / Antec TPN 650w / Antec Earthwatts 650w / Antec 430w
Software:	Windows 7 Professional x64

System Name:	It's just a computer
Processor:	i7 950 @4.2GHz
Motherboard:	eVGA Classified 3
Cooling:	D5, PA140.3, HK Rev. 3.0
Memory:	Mushkin 998966 Radioactive
Video Card:	2x eVGA 01G-P3-1373-AR in SLI
Hard Disk:	4x 64GB G2 SSD RAID 0
Optical Drive:	Samsung SH-S223L
CRT/LCD Model:	Samsung 305T Plus
Case:	Thermaltake Xaser VI
Sound Card:	Auzen X-Meridian 7.1 2G/Z-5500
PSU:	Corsair AX1200
Software:	Win7 Ultimate x64 SP1
Benchmarks:	3DM Vantage 36196

Processor:	2500K @ 4.5GHz 1.28V
Motherboard:	ASUS P8P67 Deluxe
Cooling:	Corsair A70
Memory:	8GB (2x4GB) Corsair Vengeance 1600 9-9-9-24 1T
Video Card:	eVGA GTX 470 & GTX275 Co-op PhysX (has a GTS250 onboard)
Hard Disk:	Crucial m4 128GB + Seagate RAID 1 (1TB x 2)
Optical Drive:	Cheap and black DVD RW
CRT/LCD Model:	Dell 19" 1280x1024 nothing special
Case:	Antec 300
Sound Card:	Onboard
PSU:	PC Power & Cooling 750W
Software:	Windows 7 64bit Pro

Jan 26, 2013, 12:45 AM	#5
Arctucas Join Date: Jul 2006 Location: Cowtown, USSofA Posts: 1,634 (0.65/day) Thanks: 60 Thanked 278 Times in 219 Posts System Specs	An old screenshot I found: __________________ Whiskey-Tango-Foxtrot. over.

Jan 25, 2013, 10:23 PM	#4
Beertintedgoggles Join Date: Nov 2005 Posts: 692 (0.25/day) Thanks: 63 Thanked 194 Times in 144 Posts System Specs	I've actually tried to go the other way with a 2x2GB kit I just bought off ebay. DDR2 4-4-4-12 @ 800 (PNY XLR8). I can get them to 1050 5-5-5-15 @ stock volts (2V). I tried 1066 at those timings too but wouldn't post so I just kept it at stock volts and 1050. Long story short, if your RAM behaves close to the same way mine did I would be optimistic that it will work at CAS4 at 800.

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