OC questions

[Gerg]

I'm new to overclocking and would like to overclock my athlon64 3500+. Here's my mobo, RAM and VGA card.
Abit AV8
Corsiar TWINX1024-3200XLPRO ( 2-2-2-5)
Leadtek 6800 GT

I know the basics, increase external clock, see how far you can go and then increase cpu core voltage to go even further. But do you have to increase AGPV, DDRV, NBV, SBV and HTV as well?

Does increasing the AGPV allow me to overclock my VGA card even further?

On the corsair site they say they tested the RAM at 2.75V but the bios setting is at 2.65V. Should I increase it to 2.75V or let it be? Also the CAS Latency in the bios says 2.5 isn't it supposed to be 2.

Sorry for such nooby questions and thanks a million.

 

[fishmahn]

Have to? No. Will it make your OC more stable? Probably.

If you raise your AGPV it will likely make your video more stable at higher OCs.

NBV/SBV will help the faster fsb speeds be more stable. HTV? Hypertransport? If that's right, same.

Lots of times the ram timings are 'auto-set' higher than the ram can go. Try setting CAS to 2, but you may need to raise the voltage to make that stable. If its completely stable at 2.65, leave it at 2.65 (a little undervolt won't hurt - IMO it'll help).

Also remember that if you're overclocking, you will be overclocking the fsb. If your mobo doesn't have a working AGP/PCI lock (most nForce mobos do, many Via mobos don't), it will limit your OC potential. Also that will overclock your RAM (with or without AGP/PCI lock), so you may need to adjust the RAM timings and/or voltage to compensate.

Mike.

 

[lb19984]

Dont worry about the memmory Ive had mine at 2.85 and its still allive



<A HREF="http://www.freewebs.com/lb19984/" target="_new">My Rig</A>

 

[Gerg]

thanks guys, but I have 3 more questions. If the fsb is at 210 for example does that mean the memory is running at 210 as well? Also, does increasing memory speed increase latency timings? Is that good or bad?

 

[miahallen]

"If the fsb is at 210 for example does that mean the memory is running at 210 as well? Also, does increasing memory speed increase latency timings? Is that good or bad?"

This is true: FSB = RAM Speed (of course, 210MHz, is 420MHz DDR).
When Corsair rates these modules, they rate the speed <b>at</b> the given latency timings, when you overclock the RAM to higher speeds, you will probably need to increase the latency timings too, otherwise the RAM will become unstable. Lower latency timings are good, but higher memory speed (even with higher latency timings) is even better.

 

[wschuerm]

XL can do ddr 250 at more relaxed timings for instance 3-4-4-10 and verry probably lower (2.5-3-3-10). Download PCwizard 2004 (type in cpuid in google) and you'll find it. In this prog you choose memory and there you can see what you memory is more or less capable of. for inastance my Corsair twinx pc 4000 is rated to work at 2.75v at ddr250 with timings of 3-4-4-10 but this prg tells me i can crank up the vdimm to 2.9v and still be ok.

MSI K8N NEO2 Platinum
AMD A64 3500+ @ 10x250
Corsair TwinX 2x512 mb PC4000 v3.3
120 maxtor SATA
Sapphire Radeon 9800pro 128mb
Watercooled by Innovatek

 

[wschuerm]

nice setup man (my rig) and nice oc aswell. I can get 2.6 ghz on mine with 1.7vcore. (got 130nm)

MSI K8N NEO2 Platinum
AMD A64 3500+ @ 10x250
Corsair TwinX 2x512 mb PC4000 v3.3
120 maxtor SATA
Sapphire Radeon 9800pro 128mb
Watercooled by Innovatek