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Get Memory based on CPU or Motherboard?

post #1 of 4
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I’m looking to get the Intel i7 3770k which takes memory types DDR3-1333 and DDR3-1600. However the motherboard I am also looking at, ASRock Z77 Extreme9, supports DDR3 3000+(OC)/2400(OC)/2133(OC)/1866(OC)/1600/1333/1066.

I will be folding and doing some personal projects which I would like a high memory rate for. But should I be considering memory rates by only the CPU? If not, how do I gain by using a higher memory rate (how does the motherboard take advantage)?

EDIT:
For example, will having a 3000 give me better performance than a 1600 even though the CPU supports up to a maximum of 1600? If so, why will there be better performance?
Edited by Beyonder - 3/15/13 at 5:46pm
post #2 of 4
Quote:
Originally Posted by Beyonder View Post

I’m looking to get the Intel i7 3770k which takes memory types DDR3-1333 and DDR3-1600. However the motherboard I am also looking at, ASRock Z77 Extreme9, supports DDR3 3000+(OC)/2400(OC)/2133(OC)/1866(OC)/1600/1333/1066.

I will be folding and doing some personal projects which I would like a high memory rate for. But should I be considering memory rates by only the CPU? If not, how do I gain by using a higher memory rate (how does the motherboard take advantage)?

The higher the Mhz, the faster data pasts between the memory and CPU.
also faster memory timing setting (lower the number) helps.
Here is a sample of how memory timings are list 9-9-9-24.
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post #3 of 4
the 1866 memory will work fine on that motherboard. the motherboard will just consider it as OC...
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BEAST
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The Wifey's Rig
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The Black Pearl
(25 items)
 
CPUMotherboardGraphicsGraphics
intel i7 3770K Gigabyte Z77 UD3R Sapphire Radeon r9 290x Sapphire Radeon r9 290x 
RAMHard DriveHard DriveHard Drive
Corsair Vengeance 8GB seagate barracuda 7200 RPM 1 TB PNY 120GB SSD PNY 240GB SSD 
CoolingCoolingCoolingCooling
ek supermacy full nickel Mayhem Pastel white  Mayhem blue non stain dye ek FC r9 290x 
CoolingCoolingCoolingCooling
ek fc r9 290x  swiftech mcp655 Koolance COV-RP450  EK-CoolStream RAD XT 240mm 
CoolingCoolingCoolingMonitor
Swiftech MCR320 360MM  Primochil ghost rigid compression fittings Primochill PETG Tubes X-star 
KeyboardPowerCaseMouse
Nixeus moda v2 EVGA SuperNova GS850 NZXT H440 Logitech G400 
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CPUMotherboardGraphicsRAM
intel i5 4430 Asrock z78 pro 4 Sapphire 7870 XT G.Skill Aries 8GB 
Hard DriveCoolingOSMonitor
A LOT OF THEM Corsair H80 Windows 7 ultimate Samsung 
KeyboardPowerCaseMouse
Cooler Master Quickfire TK Corsair 650XT Thermale take armor revo 4 Cooler master storm xornet 
Mouse PadAudio
Steelseries CKQ Steelseries Flux luxury edition 
CPUMotherboardGraphicsRAM
Intel i7 3770k GigaByte GA-Z77x-UD3H sapphire R9 290X Corsair Vengeance 8GB  
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western digital caviar blue Samsung HF-132B Corsair Sp120 Corsair AF AF120 LED 
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post #4 of 4
get the fastest memory you can afford, it makes i difference, apart form something like 2800+ which only very rare chips can do, due to the strength of the individual memory controller. for ivy bridge, more MHz is preferential to lower timings

Edit: im currently doing a big list of benchmarks for ram speeds, here's a small bit of what i have so far, comparing my Samsung stock speed at 1600MHz-11-11-11-28-2T, vs the same ram overclocked to 1866MHz-10-10-10-28-1T, i will be adding more benchmarks and speeds eg. 2133MHz and 1333MHz to show scaling.




Quote:
For example, will having a 3000 give me better performance than a 1600 even though the CPU supports up to a maximum of 1600? If so, why will there be better performance?

the CPU "officially" supports a maximum of 1600, so Intel can blame incompatibilities and problems with higher ram speed on you not using 1600 (which is quite true, the do actually tell people who have problems they should have just used 1600 rather than fix it) but they are perfectly happy running higher speeds, hence the board stating it can run higher speeds eg 2400 (OC) saying that they are technically overclocking the ram.

AFAIK timings are how long it take the ram to process instructions, so lower timings = less time taken to complete an instruction. Mhz is essentially how much information is processed in that instrcution, but higher mhz ram has higher timings, but as a really simplistic way of viewing it, 3000Mhz is roughly twice the speed of 1600, but doesnt have timing that are twice as high, so the 3000 can process more instructions per second. see the maxxmem results in my table above thumb.gif
Edited by jdc122 - 3/15/13 at 5:57pm
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new build
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open air bench 
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