i posted this topic in off-topic too, but no one answers so i ask here:

my cpu: core-i7 2600k which supports ddr3 1066 and 1333mhz
my rams: 4x2gb ddr3-1600mhz 9-9-9-24 corsair vengeance (had to set manuelly

just till socket 775 core 2 cpus i know if u want cpu and ram working fine, they had to have same frequency.
by the core-i series i dont really know and i dont want try something wrong.

my questions:
1. do i have to oc my cpu because my rams are too good for it?
2. if yes, how works that? i have options for ratio (34) and CPU- basefrequency [10khz] 10000, oc in 10steps

i dont want to oc the cpu like hell, if i wanted so i would buy better rams and dont like watercooling. anyway i dont hink i get it oced much cause in crysis2 i have temps for all 4 core between 45°C. i think i used a bit much thermal grease between cpu and heatsink (bought a new one on friday).

1600 is good speed for RAM, put your CPU at 4.2 - 4.6.

ok and can u explain me why? you mean i have to set base freqeuncy?
like earlier core-2 series, the rams have base freqeuncys which the cpu′s base frequency had to be similar?
whats here the system?

because 1333 ain't a good speed for RAM, you have 1600mhz RAM, your i7 supports that speed like my i5 supports it.
it's a good idea to OC your CPU especially with this game cause you're gonna see big difference.
i dunno how you OC your CPU on your system, do it from the bios then save that setting, if your windows doesn't load up it's gonna need more voltage or it's gonna need slowed down a little.
Trial and error, above all don't worry these new systems are built for OCing, make sure your RAM is at 1600, i could take a pic of my bios to show you my settings but my mobo is different so i got a different bios.

I'm >>
i5 760 OCed to 4.2 (stock is 2.8)
RAM 1600 (stock is 1600)
GPU stock

ok what i want to ask exactly is, what makes ram and cpu similar if i set to 4.6ghz? cause there must be something logicial dependence. at the moment i know my cpu is in this way too slow for my rams.

your RAM has to be able to keep up with the CPU, not the other way around, you don't have to OC sh-it, but your ram needs to be at 1600 because any lower speeds will turn it into a girlie computer.
i don't really know what the problem is, if you want to OC your i7 then good, it's what 99.999% of knowlegdeable gamers would do, to do this google 'i7 2600k overclocking guide' or some sh-it like that.

I don't know where that idea of cpu being slow for ram came from, but what i can tell you is, you can oc your cpu if you want to have more fps' in games, while I see no connection between speed of cpu and ram. :/
You have great cpu, great ram, I don't see why you need to oc it. I bet your C2 runs over 30 fps...

ive got the i5 2500k with an asus p8p67 pro mobo 8gb 1600 ripjaw with asus auto tune it does it for you, no need to go into the bios. overclocks at about 4and a half ghz or you can have extreme setting havent tried that as i only have a stock cooler at the moment.gonna get another 8gb 1600 ripjaw soon.

your RAM has to be able to keep up with the CPU, not the other way around, you don't have to OC sh-it, but your ram needs to be at 1600 because any lower speeds will turn it into a girlie computer.
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Sorry but that's a load of ****, while higher RAM speeds help they won't give you a huge performance boost on their own, main benefit of higher memory speeds is it enables your cpu to clock higher without having to actually overclock the memory. For example before I recently had my i7 I was using a q6600 with ancient 667mhz ram and I could only reach 3ghz because clock speed of 333mhz x 9 multiplier (RAM divider is cpu clock x 2). If I had 800mhz RAM I could do 400 x 9 (for 3.6ghz) which would keep my RAM at 800 mhz because it would be whatever the cpu clock it times 2.

Now the i7's don't have the same limit due to the unlocked or high multiplier, so you can basically push them high without your memory bottlenecking them. Even with 1333 mhz RAM you can easily reach 4.5 ghz while keeping your RAM at stock on a 2600k (or 4.2ghz without the k).

Listen lady, if the guy got 1600 ram and runs it at 1333 that's homo, get over it.

Listen lady, if the guy got 1600 ram and runs it at 1333 that's homo, get over it.

There's nothing wrong with 1333 mhz RAM as he will still be able to take his cpu up high while keeping his RAM at stock, as for running his 1600 mhz RAM it's probably a limit on his motherboard rather than CPU (I know for a fact a 2600k isn't limited to 1600 mhz because I currently run mine at that). He can reach his RAM stock speeds by overclocking the memory however considering he's not going to bottleneck @ 1333mhz easily there isn't really any point. I seen loads of people with at least 4.5ghz overclock with 1333 mhz stock memory they don't have any problems.

Hopefully he's got the right mobo chipset for overclocking the 2600k. That would blow if you got the wrong one lol.

For Sandy bridge, bclk overclocking is ofter screwed to hell, you have to use the multiplier (great if you have an unlocked version like the 2600k) and use the mobo to set the ram frequency. Intel really hates bclk overclocking as it raises a whole bunch of chipset frequencies and you have to be careful. I could be wrong about this, but its why you have extreme difficulty overclocking non K versions for sandy bridges. Whilst your mobo may say the base frequency can be overclocked, small increases can cause instability, where as the multiplier is fairly stable in terms of just needing more cooling and voltage after a certain point.

As for 1333 vs 1600, tests have show that having ram below its rated speed CAN be superior if it allows tighter timings.

Just to help out i guess, i have a 2500k, and i OC its to 4.5, my ram is at 1600, but instead of taking it to 1850, i lowered the timings and kept it at 1600, windows index rates it at 7.9 with 8-8-8-24, but if i kept them at 1850 with 9-9-9-24, the index registers at 7.6, of course then, for me at least, lower timings gave me better performance, leading to the main reason that i was keeping both CPU and DIMMs in sync.

Not sure about i7's but after 4.4, 2500k's get greedy, they demand close to 1.37 volts to operate, which isnt really THAT much, but considering they can operate at 4.4 with 1.30 its a giant leap in volt consumption, which translates into heat, which........... i have air cooling, so i have to keep an eye on.

So my recommendation is keep it on 4.4 which is more than enough, and since your on air cooling, it seems your only option, although i can tell you safely, nothing has ever pushed my CPU to 100%, except....... p95, which in that case you should really start to worry, because temps rise quickly.

Yep, I too set my memory timings for 400Mhz to 6 6 6 18 and that gave me a better overclock to 3.2Ghz and 1600Mhz FSB. Stock is 2.66Ghz/1333Mhz(Core2 Quad - Yorkfield) and my CPU is locked.

Hopefully he's got the right mobo chipset for overclocking the 2600k. That would blow if you got the wrong one lol.


Well obviously he has because a 1155 chip wouldn't fit iun any other i7 board.

However cheap motherboards have limited RAM speeds, doesn't mean he can't go into efi bios and change it to 1600 but it's not recommended unless you plan on overclocking and will give hardly any benefit if you don't OC and you'll be putting a small amount of stress on the mobo by pushing it past recommended specs.

If he's going to keep the CPU at stock he might as well leave the RAM as it is what's a few mhz anyway?

Hopefully he's got the right mobo chipset for overclocking the 2600k. That would blow if you got the wrong one lol.


Well obviously he has because a 1155 chip wouldn't fit iun any other i7 board.

If he's going to keep the CPU at stock he might as well leave the RAM as it is what's a few mhz anyway?

Chipset not socket, like H67 vs P67 vs Z68. If you plop a i7 2600k or 2500k into a mobo with H67 chipset you can use the onboard graphics but can't overclock. Possibly worthwhile for a workstation with 2500k but pointless with 2600k.

I'd recommend stock speeds with lower timings for the ram if you aren't overclocking ram.

Just figured I'd boost my own e-peen. I was lucky to get my sb from a really good batch. This thing posts at 5.5 as well as a few super pi runs. It's been 24/7 at 4.9 @1.42 since maybe March. Push these biches and they keep asking for more.....If you have good cooling on air (better yet h20) you can reach 4.5-4.9 with it being maybe within 10 c of tmax after prime 95 blend (depending on the mobo you have too though)....




Dunno why its only showing 1/2 the image, too big maybe? Ifu follow the link it shows the rest lol. Punish your SB!!!!

1.488, holy crap you going to fry that thing.

At this point Im gonna speculate no. When I built this in Feb all of OCN was wondering what was gonna happen. Intels white sheets suggest no more than 1.5 vc on air. The only ppl Ive seen having degredation are some folks on xtremesystems who are pounding 1.6 on multiple suicide runs. Time will tell but my chip hasn't shown any real signs of overstress. The above isn't my 24/7 but 4.9 @ 1.41-3 is. Im tellin ya, these take a beating and dont even flinch. Even the bclk can get moving to around 110. Anything more than 110 or 5.4 and it won't post though lol. I think I have a good setup in terms of gpu vs power as Im using sli 570's and they run at nearly 99% on load....

didnt mean to threadjack just throwing it out there as to what many ppl are getting on these cpu's