Overlocking and XP boot issue

[strata]

I recently wanted to change the FSB multiplier so that i could get higher memory latency. Since my memory is DDR-500 i figured i'd change the multiplier to 10 and run at 260mhz to give me 2.6 ghz in speed, as well as a memory latency of 520. So after all was said and done, XP wouldn't boot. Is there any way to fix this??

AMD 4800+
OCZ Gold DDR-500
MSI K8N Diamond Plus
7900GTX

 

[caskachan]

I recently wanted to change the FSB multiplier so that i could get higher memory latency. Since my memory is DDR-500 i figured i'd change the multiplier to 10 and run at 260mhz to give me 2.6 ghz in speed, as well as a memory latency of 520. So after all was said and done, XP wouldn't boot. Is there any way to fix this??

AMD 4800+
OCZ Gold DDR-500
MSI K8N Diamond Plus
7900GTX

the first obvious thing to consider is that your running your 500 ddr memory at 520......

now, before any of the elite techs here, flame me, my point is that perhpas your memory timings are so tight that, it has reached its maximum peak at 500 ddr , while perhaps yes lowering the timings it could well go farther
(as in my case my 533 ddr runs at 620ddr )

you would need to fumble in the bios a bit, basically set the memory timings higher, (slower) so it has more headroom to reach higher speeds

 

[TheTallGuy]

What caskachan said is good. Remember that you might have to raise the RAM voltage too.

 

[darkstar782]

Your memory CLOCK is 260MHz. Youe EFFECTIVE CLOCK is 520MHz. Your memory latency is expressed in a sequence of numbers, '2.5-3-3-8' for example, although I dont know what yours is.

Lower latencies are better, not higher.

If you set the latency timings manually in the BIOS you should be able to achieve DDR-520 speeds easily.

 

[strata]

Could somebody please remind me what each number in the memory timings corresponds to.

 

[angry_ducky]

What is your HTT multiplier? On most boards, HTT won't go over 1100MHz (2200MHz DDR). The default multiplier is 5. 5*260=1300MHz, which is probably way too high.

IMO, you should use the normal CPU multiplier (it should be 12), set the HTT multiplier to 4x, and set the base clock to 220. 12*220=2640, which is your CPU speed. 220*4=880, which is your HTT speed (1760MHz DDR).

Set your RAM:CPU ratio to 4:3.

 

[strata]

Well the ram isn't allowing me to go over 500 no matter how many ways i try to rework it, so i'm just running a 10x multiplier with 250 so i get 2.5 ghz and my ram comes out right at 500 with no problems...is the extra .1 ghz really gonna mean that much of a performance increase?

 

[caskachan]

Well the ram isn't allowing me to go over 500 no matter how many ways i try to rework it, so i'm just running a 10x multiplier with 250 so i get 2.5 ghz and my ram comes out right at 500 with no problems...is the extra .1 ghz really gonna mean that much of a performance increase?

angry ducky has a veyr important point i did miss in my suggestion, yes HT in the case of and amd doesnt seem to like the idea of going over 1100~1200 mhz so yes you should lower your HT multiplier (from 5 to 4)

my own personal record is this machine i am right now

AMD2 mobo, with a cheap sempron 3000 (effective 1.6)200fsb overclocked to 2666 effective(333X8) with stock heatsink, havent upped any voltage, the HT is running at 3X333 (999) and the memory is in par at 333 (666ddr) a cheap 533 ddr2 memory at that!

this overclock surpases the performance of my computer at work which is an A64 939 3200 with 250 fsb

dont look at the ghz increments on your chip, rather look forward for greater FSB with "normal" HT's and memory speeds , mor eif possible thats the real cake on these newer chips

i always set the memories timings at the higher value ( 533ddr2 memory configured with SLOW 800ddr2 memory, and when i get my fsb, speed, then i work on tightening the memory try it hope you can overclock, and sorry for writing on so much x_X, and thank you for reading

 

[krazyIvan]

Change your memory divider to the next speed down.
Or try upping the RAM voltage.

 

[caskachan]

oooh i must been dense the two times, an even easier way to do this, go into windows and download CPU-Z from google, open it and look at the memory tab, there should be a listing of memory timings for YOUR memory at each speed, set you ram at 200, BUT set the timings to that that supports at 533 or 800, lower the HT in the bios,

Another thing i forgot to add, my computer WONT boot overclocking from the bios, but ONCE in windows, i use CLOCKGEN, and it works flawlesly , it even loads your overclock at startup, this way you can increment in 5 mhz , until it crashes, and you found your limit, and when all is stable, you can then try lowering the memory timings


hope this helps