Sandy Bridge's Native Memory Speed?

OnePostWonder · Feb 5, 2011

I would like for someone to enlighten me as to what the native memory speed for Sandy Bridge is.

What sparked my interest in this was an article over at Fudzilla describing Ivy Bridge's native DDR3 1600mhz support.

Perhaps it would be best if someone first explained to me how "native memory speed" is decided.

When I look at a motherboard such as Asus' P8P67-Pro, it lists memory support as DDR3 2200(O.C.)*/2133(O.C.)/1866(O.C.)/1600/1333/1066. From what I've been able to find and read, speeds without (O.C.) next to them indicate native support.

Though Intel's own charts show a processor such as the i7 2600k with DDR3 1333mhz support.

Am I misguided?

cdawall · Feb 5, 2011

1333mhz is jedec's max DDR3 speed.

OnePostWonder · Feb 5, 2011

I had something written here, then I thought some more.

cdawall · Feb 5, 2011

OnePostWonder said:
I had totally forgotten about profiles.

So when referring to "native", it may be used synonymously with JEDEC?

yes AMD technically is 1333 as well but advertise 1600mhz which i thought intel did as well

OnePostWonder · Feb 5, 2011

http://en.wikipedia.org/wiki/DDR3_SDRAM#Modules

So when referring to "max DDR3 speed", which column are you referring to?

cdawall · Feb 5, 2011

OnePostWonder said:
http://en.wikipedia.org/wiki/DDR3_SDRAM#Modules

So when referring to "max DDR3 speed", which column are you referring to?

so i was incorrect JEDEC's maximum speed is 1600mhz for DDR3

The JESD79-3 document defines DDR3L SDRAM, including features, functionalities, AC and DC characteristics, packages, and ball/signal assignments with the exception of what is stated within this standard. The purpose of this standard is to define the DDR3L specifications that supersede the DDR3 specifications as defined in JESD79-3. The use of DDR3-800, DDR3-1066, DDR3-1333, and DDR3-1600 titles in JESD79-3 are to be interpreted as DDR3L-800, DDR3L-1066, DDR3L-1333, and DDR3L-1600, respectively, when applying towards DDR3L definition; unless specifically stated otherwise.

http://www.jedec.org/standards-documents/docs/jesd79-3-1

OnePostWonder · Feb 5, 2011

I still don't understand why Asus acts as if DDR3 1600 is native on Sandy Bridge, yet Intel's charts state otherwise.

I may just be entirely confused.

Unrelated: Do you play Bad Company 2, cdawall? I feel like I've seen your name somewhere and BC2 seems to be the right context.

Mussels · Feb 5, 2011

the native memory support is what they're guaranteed to work with, inside JEDEC standards.

cdawall · Feb 5, 2011

OnePostWonder said:
I still don't understand why Asus acts as if DDR3 1600 is native on Sandy Bridge, yet Intel's charts state otherwise.

I may just be entirely confused.

Unrelated: Do you play Bad Company 2, cdawall? I feel like I've seen your name somewhere and BC2 seems to be the right context.

nah only games i have been on are GT5 and crysis

and intel is a bunch of goobers they only list the i7 965EE as a 800/1066

http://ark.intel.com/Product.aspx?id=37149

cadaveca · Feb 5, 2011

All 1366 i7's have the same "limit". P55 is 1066/1333. Been that way for many years now...

:nutkick:

Mean that if you run XMP...no warranty...anything higher than those specs...guess what, no warranty.

Something to keep in mind when you gotta rma...

P67 is P55 equivalent, so the same memory speeds still apply. SKT 2011...remains to be seen.

Also, JEDEC also has 1833/2133 spec too, for the up and coming BullDozer(maybe SKT 2011?). Hence all the new 1.5v DIMMs.

cdawall · Feb 5, 2011

cadaveca said:
All 1366 i7's have the same "limit". P55 is 1066/1333. Been that way for many years now...

Mean that if you run XMP...no warranty...anything higher than those specs...guess what, no warranty.

Something to keep in mind when you gotta rma...

you can return a product to gskill for not performing at rated speeds. like my tridents XMP to 2000CL9 on P55 other than that chipset if they wont clock to 2000 then its your bad for buying the wrong ram. worked perfect on my H55 but i knocked them back to 1600 6-9-6 1.55v

OnePostWonder · Feb 5, 2011

Mussels said:
the native memory support is what they're guaranteed to work with, inside JEDEC standards.

"They're" being the CPUs? If so, are you therefore stating that the i7 2600k is not guaranteed to work with DDR3 1600mhz memory?

Also, I read your reply with a big grin on my face...because I looked at the seal first.

What follows is an attempt at a double quote:

cdawall said:
and intel is a bunch of goobers they only list the i7 965EE as a 800/1066

I lawled and flashed back to a Chemistry room in HS when a Chem teacher, appropriately deemed Mr. Waddlesworth, called a student a goober and lost.

cadaveca · Feb 5, 2011

cdawall said:
you can return a product to gskill for not performing at rated speeds. like my tridents XMP to 2000CL9 on P55 other than that chipset if they wont clock to 2000 then its your bad for buying the wrong ram. worked perfect on my H55 but i knocked them back to 1600 6-9-6 1.55v

I'm afraid you lost me? I thought we were talking about CPU's?

cdawall · Feb 5, 2011

cadaveca said:
I'm afraid you lost me? I thought we were talking about CPU's?

i thought we were talking about both my mistake :laugh:

cadaveca · Feb 5, 2011

cdawall said:
i thought we were talking about both my mistake

Apology accepted. Moving along...

Mussels · Feb 5, 2011

the memory controllers are in the CPU's.

more or less, its what they gurantee to work.

if they say 1600Mhz supported, you can RMA if 1600MHz at JEDEC standard timings and voltages doesnt work.

If you try 1800Mhz they can say "tough luck, not supported"

OnePostWonder · Feb 5, 2011

I still am quite confused.

Cadaveca, you say that the P67 is the P55 equivalent, therefore the same memory speeds still apply.

Yet from what I gathered from the article at Fudzilla, Intel's 7 series chipset will move up to DDR3 1600 being supported natively, so the idea that the memory speeds are given based on the market segment doesn't fit. Perhaps I was misreading you, but I'm sure this is what you were implying.

cadaveca said:
All 1366 i7's have the same "limit". P55 is 1066/1333.

You confused me here too, as you went from socket and brand to a chipset that isn't related to either.

OnePostWonder · Feb 5, 2011

Mussels said:
the memory controllers are in the CPU's.

more or less, its what they guarantee to work.

if they say 1600Mhz supported, you can RMA if 1600MHz at JEDEC standard timings and voltages doesn't work.

If you try 1800Mhz they can say "tough luck, not supported"

Now it is making sense. Do you find it odd then, Mussels, that Asus lists DDR3 1600 on Sandy Bridge without the (O.C.) next to it?

Or does that indicate that DDR3 1600 is now within JEDEC standard, even though it isn't "supported" by the CPU?

cadaveca · Feb 5, 2011

OnePostWonder said:
I still am quite confused.

Cadaveca, you say that the P67 is the P55 equivalent, therefore the same memory speeds still apply.

Yes, explanation in a moment.

Yet from what I gathered from the article at Fudzilla, Intel's 7 series chipset will move up to DDR3 1600 being supported natively, so the idea that the memory speeds are given based on the market segment doesn't fit. Perhaps I was misreading you, but I'm sure this is what you were implying.

I try to not imply anything.

You confused me here too, as you went from socket and brand to a chipset that isn't related to either.

Yeah, you bet i did. SKT1366 is i7(x58), but SKT1156(P55) is i7/i5/i3....and then, SKT1155(P67) is i7/i5/i3 as well. Even more confused? It only gets better.

But seemingly, you got it all right there anyway, so although it may be confusing, I think you catch my drift.

OnePostWonder said:
Now it is making sense. Do you find it odd then, Mussels, that Asus lists DDR3 1600 on Sandy Bridge without the (O.C.) next to it?

Or does that indicate that DDR3 1600 is now within JEDEC standard, even though it isn't "supported" by the CPU?

No, what ASUS is trying to guarantee is that the board( they mean bios) will support 1600mzh ram. They'd be lying in some situations. But, Mussels is right, if the board doesn't work, or a differnt bios on the same board doesn't work, then they will accept an RMA based on those conditions. But he means the board makers, not Intel.

The question reamins, how do they certify that 1600mhz speed, without a cpu that supports it?

Mussels · Feb 5, 2011

OnePostWonder said:
Now it is making sense. Do you find it odd then, Mussels, that Asus lists DDR3 1600 on Sandy Bridge without the (O.C.) next to it?

Or does that indicate that DDR3 1600 is now within JEDEC standard, even though it isn't "supported" by the CPU?

no because asus are guaranteeing different speeds to intel.

they're saying "this BOARD can do XXXX Mhz", whereas intel are saying what the CPU is guaranteed to do.

btarunr · Feb 5, 2011

The i7 chips' IMC supports 12x DRAM multiplier, i5 is limited to 10x.

cdawall · Feb 5, 2011

Mussels said:
no because asus are guaranteeing different speeds to intel.

they're saying "this BOARD can do XXXX Mhz", whereas intel are saying what the CPU is guaranteed to do.

best thing about asus is they can claim 1600mhz is overclocking and overclocking is never a guarantee. similar to MSI and the 790FX-GD70 which "supported" 2000mhz ram no one really ever hit 2000mhz with that mobo

OnePostWonder · Feb 5, 2011

ITT: Everyone is a celebrity except me :laugh:

Cadaveca, I was mistaken about the P55 chipset. In my mind I had jumped back one more generation, so I see where I made my mistake.

I believe I understand now, Mussels.

Is it a correct statement then to say that you may buy a board like the P8P67-Pro, buy memory rated at 1600mhz and not have to OC, and buy a processor like the i7 2600k which natively supports 1333mhz memory, and the memory will still run at 1600mhz?

cdawall · Feb 5, 2011

OnePostWonder said:
ITT: Everyone is a celebrity except me

Cadaveca, I was mistaken about the P55 chipset. In my mind I had jumped back one more generation, so I see where I made my mistake.

I believe I understand now, Mussels.

Is it a correct statement then to say that you may buy a board like the P8P67-Pro, buy memory rated at 1600mhz and not have to OC, and buy a processor like the i7 2600k which natively supports 1333mhz memory, and the memory will still run at 1600mhz?

core i3 560 had no issues using the XMP profile for 2000mhz just one click and it was good to go same should go for your p8p67 good luck getting one after the B2 fiasco

cadaveca · Feb 5, 2011

OnePostWonder said:
Is it a correct statement then to say that you may buy a board like the P8P67-Pro, buy memory rated at 1600mhz and not have to OC, and buy a processor like the i7 2600k which natively supports 1333mhz memory, and the memory will still run at 1600mhz?

technically, yes. People will tell you 4x 2gb sticks @ 2133 is hard too, but you know, what, I don't listen

:

System Name	PC
Processor	i5 2500k
Motherboard	P8Z68-V PRO/GEN3
Cooling	Fans
Memory	DDR3-1600 (8GB)
Video Card(s)	Sapphire Nitro+ RX 580
Storage	HD103SJ
Display(s)	XG2402
Case	Xigmatek Midgard II
Power Supply	PC Power & Cooling Silencer 750W

System Name	All the cores
Processor	2990WX
Motherboard	Asrock X399M
Cooling	CPU-XSPC RayStorm Neo, 2x240mm+360mm, D5PWM+140mL, GPU-2x360mm, 2xbyski, D4+D5+100mL
Memory	4x16GB G.Skill 3600
Video Card(s)	(2) EVGA SC BLACK 1080Ti's
Storage	2x Samsung SM951 512GB, Samsung PM961 512GB
Display(s)	Dell UP2414Q 3840X2160@60hz
Case	Caselabs Mercury S5+pedestal
Audio Device(s)	Fischer HA-02->Fischer FA-002W High edition/FA-003/Jubilate/FA-011 depending on my mood
Power Supply	Seasonic Prime 1200w
Mouse	Thermaltake Theron, Steam controller
Keyboard	Keychron K8
Software	W10P

System Name	PC
Processor	i5 2500k
Motherboard	P8Z68-V PRO/GEN3
Cooling	Fans
Memory	DDR3-1600 (8GB)
Video Card(s)	Sapphire Nitro+ RX 580
Storage	HD103SJ
Display(s)	XG2402
Case	Xigmatek Midgard II
Power Supply	PC Power & Cooling Silencer 750W

System Name	All the cores
Processor	2990WX
Motherboard	Asrock X399M
Cooling	CPU-XSPC RayStorm Neo, 2x240mm+360mm, D5PWM+140mL, GPU-2x360mm, 2xbyski, D4+D5+100mL
Memory	4x16GB G.Skill 3600
Video Card(s)	(2) EVGA SC BLACK 1080Ti's
Storage	2x Samsung SM951 512GB, Samsung PM961 512GB
Display(s)	Dell UP2414Q 3840X2160@60hz
Case	Caselabs Mercury S5+pedestal
Audio Device(s)	Fischer HA-02->Fischer FA-002W High edition/FA-003/Jubilate/FA-011 depending on my mood
Power Supply	Seasonic Prime 1200w
Mouse	Thermaltake Theron, Steam controller
Keyboard	Keychron K8
Software	W10P

System Name	PC
Processor	i5 2500k
Motherboard	P8Z68-V PRO/GEN3
Cooling	Fans
Memory	DDR3-1600 (8GB)
Video Card(s)	Sapphire Nitro+ RX 580
Storage	HD103SJ
Display(s)	XG2402
Case	Xigmatek Midgard II
Power Supply	PC Power & Cooling Silencer 750W

System Name	Rainbow Sparkles (Power efficient, <350W gaming load)
Processor	Ryzen R7 5800x3D (Undervolted, 4.45GHz all core)
Motherboard	Asus x570-F (BIOS Modded)
Cooling	Alphacool Apex UV - Alphacool Eisblock XPX Aurora + EK Quantum ARGB 3090 w/ active backplate
Memory	2x32GB DDR4 3600 Corsair Vengeance RGB @3866 C18-22-22-22-42 TRFC704 (1.4V Hynix MJR - SoC 1.15V)
Video Card(s)	Galax RTX 3090 SG 24GB: Underclocked to 1700Mhz 0.750v (375W down to 250W))
Storage	2TB WD SN850 NVME + 1TB Sasmsung 970 Pro NVME + 1TB Intel 6000P NVME USB 3.2
Display(s)	Phillips 32 32M1N5800A (4k144), LG 32" (4K60) \| Gigabyte G32QC (2k165) \| Phillips 328m6fjrmb (2K144)
Case	Fractal Design R6
Audio Device(s)	Logitech G560 \| Corsair Void pro RGB \|Blue Yeti mic
Power Supply	Fractal Ion+ 2 860W (Platinum) (This thing is God-tier. Silent and TINY)
Mouse	Logitech G Pro wireless + Steelseries Prisma XL
Keyboard	Razer Huntsman TE ( Sexy white keycaps)
VR HMD	Oculus Rift S + Quest 2
Software	Windows 11 pro x64 (Yes, it's genuinely a good OS) OpenRGB - ditch the branded bloatware!
Benchmark Scores	Nyooom.

System Name	RBMK-1000
Processor	AMD Ryzen 7 5700G
Motherboard	ASUS ROG Strix B450-E Gaming
Cooling	DeepCool Gammax L240 V2
Memory	2x 8GB G.Skill Sniper X
Video Card(s)	Palit GeForce RTX 2080 SUPER GameRock
Storage	Western Digital Black NVMe 512GB
Display(s)	BenQ 1440p 60 Hz 27-inch
Case	Corsair Carbide 100R
Audio Device(s)	ASUS SupremeFX S1220A
Power Supply	Cooler Master MWE Gold 650W
Mouse	ASUS ROG Strix Impact
Keyboard	Gamdias Hermes E2
Software	Windows 11 Pro

Sandy Bridge's Native Memory Speed?

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