From 800mhz to 600mhz

varga_2005 · 12-23-2008, 12:30 PM

I have a memory ram ddr 2 at 800mhz which is working at 667mhz.I have a motehrboard asus p5k se/epu.How can I make mymemory to work at 800mhz?Thank you.

**magnethead** · 12-23-2008, 06:00 PM

Because you're running your CPU FSB at 333 instead of 400. I'm assuming you have a 2.0, 2.33, or 2.66 GHz CPU (333*6,7,8 respectively).

You can drop your multiplier a level and put your FSB closer to 400, the p5k should support it, but your CPU may not drop multipliers low enough and/or your system may become unstable.

What CPU do you have?

varga_2005 · 12-24-2008, 07:20 AM

i have an intel core 2 duo e7300 at 2.66

**magnethead** · 12-24-2008, 04:43 PM

What FSB are you currently running on? 333*8 or 296*9 or 266*10?

That CPU should easily go to 2.8 or possibly 3.0 on stock heatsink. Anything more, i would put an aftermarket cooler on it.

I ran my e6750 at 3.0 (stock 2.66) with stock heatsink and voltages around 35C or so. I had it going at 375*8. The perfect CPU > RAM speed is 2.8 and 3.2 GHz (400*7 and 400*8).In your case, I would put it at 400*7, make sure it's prime95, orthos, and 3Dmark stable, and call it good.

**grimx133** · 12-24-2008, 09:00 PM

He's on 266 x 10.

**magnethead** · 12-25-2008, 01:55 PM

Quote:

Originally Posted by grimx133

He's on 266 x 10.

that explains the underclocked RAM. Needs to bump FSB, drop multiplier, and stress test.

**grimx133** · 12-25-2008, 08:20 PM

Still should run at the rated speed even with the bus at 266. I think that if he puts his bus and ram on manual, the options might come up. Who knows, may be able to get 400 x 6.5, though I haven't booted past a 370 bus. It'll give me something to do on the weekend.
Too bad my parents live a thousand km. away, I put a P5K SE into their machine last summer.

12-23-2008, 12:30 PM	#1 (permalink)
varga_2005 Registered User Join Date: Dec 2008 Posts: 2 OS: vista 32 bit sp 1	From 800mhz to 600mhz I have a memory ram ddr 2 at 800mhz which is working at 667mhz.I have a motehrboard asus p5k se/epu.How can I make mymemory to work at 800mhz?Thank you.

12-23-2008, 06:00 PM	#2 (permalink)
magnethead Registered User Join Date: Mar 2006 Location: Texas, USA Posts: 3,570 OS: Vista ultimate 32bit My System Blog Entries: 3	Re: From 800mhz to 600mhz Because you're running your CPU FSB at 333 instead of 400. I'm assuming you have a 2.0, 2.33, or 2.66 GHz CPU (3336,7,8 respectively). You can drop your multiplier a level and put your FSB closer to 400, the p5k should support it, but your CPU may not drop multipliers low enough and/or your system may become unstable. What CPU do you have? __________________ For proper support: what are you running? graphics, cpu, m/board, ram, PSU brand wattage* PCI-E requires 26 amps at 12 volts. That's a 650W PSU. Power Supply Info and Selection . Info on thermal compounds & application . TEST PSU USING MULTI-METER . Bench Testing Your System

12-24-2008, 07:20 AM	#3 (permalink)
varga_2005 Registered User Join Date: Dec 2008 Posts: 2 OS: vista 32 bit sp 1	Re: From 800mhz to 600mhz i have an intel core 2 duo e7300 at 2.66

12-24-2008, 04:43 PM	#4 (permalink)
magnethead Registered User Join Date: Mar 2006 Location: Texas, USA Posts: 3,570 OS: Vista ultimate 32bit My System Blog Entries: 3	Re: From 800mhz to 600mhz What FSB are you currently running on? 3338 or 2969 or 26610? That CPU should easily go to 2.8 or possibly 3.0 on stock heatsink. Anything more, i would put an aftermarket cooler on it. I ran my e6750 at 3.0 (stock 2.66) with stock heatsink and voltages around 35C or so. I had it going at 3758. The perfect CPU > RAM speed is 2.8 and 3.2 GHz (4007 and 4008).In your case, I would put it at 4007, make sure it's prime95, orthos, and 3Dmark stable, and call it good. __________________ For proper support: what are you running? graphics, cpu, m/board, ram, PSU brand wattage* PCI-E requires 26 amps at 12 volts. That's a 650W PSU. Power Supply Info and Selection . Info on thermal compounds & application . TEST PSU USING MULTI-METER . Bench Testing Your System

12-24-2008, 09:00 PM	#5 (permalink)
grimx133 Mentor Hardware Team Join Date: Jan 2008 Location: Canada eh Posts: 3,144 OS: xp mce sp2, xp pro sp2, windows 7 beta My System	Re: From 800mhz to 600mhz He's on 266 x 10. __________________

12-25-2008, 08:20 PM	#7 (permalink)
grimx133 Mentor Hardware Team Join Date: Jan 2008 Location: Canada eh Posts: 3,144 OS: xp mce sp2, xp pro sp2, windows 7 beta My System	Re: From 800mhz to 600mhz Still should run at the rated speed even with the bus at 266. I think that if he puts his bus and ram on manual, the options might come up. Who knows, may be able to get 400 x 6.5, though I haven't booted past a 370 bus. It'll give me something to do on the weekend. Too bad my parents live a thousand km. away, I put a P5K SE into their machine last summer. __________________