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Overclocking XP 2400+ on K7VM2 - newbie....

post #1 of 7
Thread Starter 
Hi all,

This is my first efforts in overclocking… In the past I was put off because I heard it was dangerous… ;-)

Seriously though – I was afraid of damaging a new and expensive PC. But when its only a £45 CPU on the line it all gets put in perspective…

So I have a ASROCK K7VM2 motherboard, with an old AMD chip in it and 512MB SDRAM. So I decide to upgrade as far as my motherboard will go (XP 2600+) but could only get hold of a XP 2400+:

Serial Number AXDA2400DKV3C 9424046250318 AIUHB 0304MPMW

I then got lots of what I thought was the correct memory:

1GB 266MHZ 184PIN DDR Memory, No-ECC. Higher performance over mainstream PC100 or PC133 memory. Up to 2.1 GB/sec of peak bandwidth using PC2100 DIMMs (with DDR266 memory chips). JEDEC Standard. 184 pin DIMM, non-ECC. DIMM Lead pitch: 1.27 mm. 2.5 Volts. SSTL-2 I/O Interface. SPD Support. Support for Memory Chip Stacking.

Then I got onto the idea of overclocking (read a few threads etc and it seems it is a good CPU for it)… and then realised I may have bought the wrong RAM :-(

But then I am not sure my motherboard will go too fast either…

So anyone had any experience overclocking on ASROCK K7VM2?

Many thanks,

J
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post #2 of 7
I don't have any experience with that motherboard but you definitely want to get at least DDR400 RAM if you really plan on OCing that chip. That RAM that you have will definitely be a bottleneck. As for the motherboard, check to see that you have all of the OCing menus in your BIOS. Most importantly are the FSB, RAM timings, and voltage adjustments. If you do see the mulitplier on the screen, you won't be able to adjust it because your chip is locked.
    
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post #3 of 7
Thread Starter 
When you say it will be a bottleneck, what will happen? Will I not be able to increase the FSB over a certain level? Do you know what that will be based on that setup? I thought you could run the CPU and memory at different speeds?

Many thanks for your help,

J
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CPUMotherboardOS
AMD ATHLON XP 2400+ K7VM2 Win XP Pro 
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post #4 of 7
it will be a bottleneck on your cpu because the amds usually have pretty high fsb speed and the higher you take the fsb the higher you take the ram and you might need to run dividers sometimes..but ddr400 will definitely give you more room to push your cpu does it take it?

Oh yes and welcome to the forums!
    
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post #5 of 7
Thread Starter 
"but ddr400 will definitely give you more room to push your cpu does it take it?"

Does what take it? And what is "it"?

I hear you should keep your PCI speed under 38Mhz...
The K7VM2 is a 266mhz chipset, and apparently only has a 1/4 CPU/PCI frequency divider. So I figure I am limited to 38MHz x 4 = 152MHz (which is FSB 304MHz at double data rate).

Standard should be FSB 133MHz x 15 = 1995MHz

So I could hopeflly get 152MHz x 15 = 2280MHz...?

Hopefully my 1GB PC2100 266Mhz DDR memory will overclock to 152MHz (304MHz) ok. I have RAM heat sink on it and a couple of fans angled up towards it. Is it a heat issue?

I guess it is just a case up gradually upping the FSB from 133MHz a few MHz at a time?

As for voltages, dividers and changing the multiplier - I guess there isn't any point going there with my motherbaord and RAM restrictions?

Thanks again,

J
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CPUMotherboardOS
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My System
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post #6 of 7
I doubt that you will get your RAM to 152 mhz, unless that is old skool quality RAM. RAM heatsinks don't really do that much for the RAM. Read somewhere that at best the heatsinks will give you 3-5% more OCing headroom.

Have you read the FAQs stickied at the top of the forum? Great article explaining where bottlenecks occur and how to OC. Great read.
    
CPUMotherboardGraphicsRAM
X2 5000+ BE Gigabyte GA-MA78GM-S2H AM2+ Integrated HD3200 2x2GB OCZ DDR2 
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X2 5000+ BE Gigabyte GA-MA78GM-S2H AM2+ Integrated HD3200 2x2GB OCZ DDR2 
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post #7 of 7
Thread Starter 
Hey I got it to 143x15 = 2145MHz stable (CPU 50C-54C, case 36C - 38C). But my motherboard does allow voltage or multiplier adjustments!! Grrrrrrrr

So was thinking of maybe a new cheap motheboard to hit the 2.4GHz...

ABIT NF7-S any good? any other suggestions? £23 here: http://www.ebuyer.com/customer/produ...uct_uid=104486
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CPUMotherboardOS
AMD ATHLON XP 2400+ K7VM2 Win XP Pro 
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My System
(13 items)
 
  
CPUMotherboardOS
AMD ATHLON XP 2400+ K7VM2 Win XP Pro 
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