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why to loosen timings??

post #1 of 7
Thread Starter 
im running now at 250 x 11 = 2750

i can boot at 250 x 12 with vcore up at 1.5 = 3000
the memory goes from 196 to 200, so basically its running stock, now with it running at 3ghz it fails orthos in seconds, the timings are 2-3-3-6 t1, ive read on here loosing memory timings but i dont see how that does anything since the memory is still the same and never changes in speed
post #2 of 7
The memory might be at stock, but as you may know, the memory controller is placed onto the CPU. This means the memory controller is overclocked, which diminishes somewhat its abilities. It is a noticed fact that you should lower the ram speed below the stock speed or loosen the timings, even though it is not overclocked. The other way to deal with this issue would be to pump up the Vram as the mem controller needs more energy to deal with the OCed settings (energy increases linearly with the square of the voltage).

Possible solutions:
-loosen timings to relax the mem controller
-lower ram freq to achieve exactly the same thing
-up ram voltage to increase available energy to the mem controller.

From all these solutions, I've chosen the second, as the A64 is most sensitive to timings, but not so starved of mem bandwidth.

*EDIT It's not so much of a ram issue as it's a CPU issue imo.

Cheers!
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post #3 of 7
Motherboard, memory, CPU, and memory controller interactions can be weird. For example, my system can't load Windows unless it is overclocked. It is stable overclocked and obviously should be stable at stock... but it is not.
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post #4 of 7
Quote:
Originally Posted by DuckieHo View Post
Motherboard, memory, CPU, and memory controller interactions can be weird. For example, my system can't load Windows unless it is overclocked. It is stable overclocked and obviously should be stable at stock... but it is not.
Those Optys were meant to be OCed, they can't help it.
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post #5 of 7
Drago, so if orthos fails a test, it doesn't necessarily mean it's the proc, it could be because the ram timings are too tight? I always had problems at 2.7 with 1.35v, it would boot but not pass orthos after 5mins.

Sorry rsxhitman to hijack your thread I was just a little curious
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post #6 of 7
Quote:
Originally Posted by thlnk3r View Post
Drago, so if orthos fails a test, it doesn't necessarily mean it's the proc, it could be because the ram timings are too tight? I always had problems at 2.7 with 1.35v, it would boot but not pass orthos after 5mins.

Sorry rsxhitman to hijack your thread I was just a little curious
Yes, Orthos failure could be a result of memory as well. One of the Orthos test options is to focus on CPU, memory, or blend. Test accordingly.

Also, MemTest86+ is the classic memory testing tool.
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post #7 of 7
Quote:
Originally Posted by DuckieHo View Post
Yes, Orthos failure could be a result of memory as well. One of the Orthos test options is to focus on CPU, memory, or blend. Test accordingly.

Also, MemTest86+ is the classic memory testing tool.
Duckie, I can run orthos for over 12hrs with the timings I have and it never fails but as soon as I go 2.7ghz, BAM. Prehaps loosing the timings will help My goal was to stay under 1.4v but I don't think that will ever happen hehe.
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