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Building a 2500k rig. Tips?

M

MaZa

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Sep 21, 2008
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This is the rig I am considering to build.


CPU: i5 2500k, obviously
Mobo: Asus Sabertooth P67 or Asrock P67 Extreme6
Ram: Corsair XMS3 DDR3 3x2gb 1333mhz CL8


Case is P182 with two Gentle Typhoon 1450rpm exhaust, one Nexus Real Silent intake and one Akasa Apache PWM fan for CPU cooling. PSU at the moment is Corsair HX520 but considering to change it to Silverstone 1000w Strider Gold once I go SLI with my GTX 460.


About ram, this is a gaming rig and I have no idea how Sandy Bridges utilize ram. In good old days it was easy, you bumped up FSB and your ram had to keep up with it preferably in synch or ratios that hit certain sweetspots. This is not the case with SB, no? Does 1600mhz, 1866mhz and such serve any purpose as only thing you touch is multiplier when overclocking CPU? I keep hearing/reading mixed responses on this issue.

Mobo, both are priced about same so which one is better value for money? Good overclocking capabilities are needed.


Any good cooler recommendations. Even though I aim to push it as hard as I can for 24/7 rig, I want to keep it silent too. CoolerMaster Hyper212+ is a popular choice but can it keep it cool on low RPMs aswell, with better fan of course (akasa apache in this case)? I could always reuse my TRUE120 but it is in serious need of lapping and I dont really feel like doing it.
 
You ram is on a multiplier too now. 13.33x 16x 18.66x 21.33x. Do the math on that one.


I'm running 4.5ghz @ 1.35v vcore (my chip is a mediocre overclocker. YMMV.)


This is what I did to OC on my Asrock P67 Pro3.

Set the CPU Multi to 45x
Enable PLL overvoltage
Set a fixed voltage of 1.35v
Set the max power draw on the board to 250w and max CPU current to 300.

As far as I know my Asrock board has an issue with supplying the chip with too much voltage if it's run in auto or offset mode.

My advice to you would be to get the Sabertooth board only because using offset voltages seems to be broken on Asrock boards.

The problem with running at a fixed voltage is that my CPU is always at 1.35v even in idle.

I'm using an H50 single fan config, and my hottest core is 62c under load.

I'm using original Ripjaws 1600. They OC to 1866 9-10-9-28 @ 1.65v I could probably lower the voltage but I didn't bother to test it out with lower voltage.
 
Ah! Thanks a lot for the ram info. So I guess I really should drop a few extra euros for 1600mhz ram.

I guess I'll go for Asus too.
 
MaZa said:
This is the rig I am considering to build.


CPU: i5 2500k, obviously
Mobo: Asus Sabertooth P67 or Asrock P67 Extreme6
Ram: Corsair XMS3 DDR3 3x2gb 1333mhz CL8


Case is P182 with two Gentle Typhoon 1450rpm exhaust, one Nexus Real Silent intake and one Akasa Apache PWM fan for CPU cooling. PSU at the moment is Corsair HX520 but considering to change it to Silverstone 1000w Strider Gold once I go SLI with my GTX 460.


About ram, this is a gaming rig and I have no idea how Sandy Bridges utilize ram. In good old days it was easy, you bumped up FSB and your ram had to keep up with it preferably in synch or ratios that hit certain sweetspots. This is not the case with SB, no? Does 1600mhz, 1866mhz and such serve any purpose as only thing you touch is multiplier when overclocking CPU? I keep hearing/reading mixed responses on this issue.

Mobo, both are priced about same so which one is better value for money? Good overclocking capabilities are needed.


Any good cooler recommendations. Even though I aim to push it as hard as I can for 24/7 rig, I want to keep it silent too. CoolerMaster Hyper212+ is a popular choice but can it keep it cool on low RPMs aswell, with better fan of course (akasa apache in this case)? I could always reuse my TRUE120 but it is in serious need of lapping and I dont really feel like doing it.
Click to expand...

The P67 is built with dual channel memory slots so you won't need 3 sticks, either 2 or 4. You can buy 2 X 4 Gig kits for about the same price.
 
Why your getting a kw powerstation? 750w and up psu are more than enough for two of those cards.

the IMC on the sandy bridge cpus are very robust. Get a set of 2000mhz ram.
 
Spooony said:
Why your getting a kw powerstation? 750w and up psu are more than enough for two of those cards.

the IMC on the sandy bridge cpus are very robust. Get a set of 2000mhz ram.
Click to expand...


More future proof. I wont be staying with 2xGTX460 forever. I dont want to upgrade my PSU every time I update my rig. Plus 1kw strider gold is surprisingly cheap here. Around same price as 850w Corsair HX IIRC.
 
Paragon54 said:
The P67 is built with dual channel memory slots so you won't need 3 sticks, either 2 or 4. You can buy 2 X 4 Gig kits for about the same price.
Click to expand...


It depends. This particular kit is very cheap in Finland. But since I am going for 1600, perhaps even above, that kit is now out.
 
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