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| Thread ID: 82920 | 2007-09-13 07:46:00 | Core 2 Duo 1333MHz FSB + DDR2 1000+ RAMs | qazwsxokmijn (102) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 590758 | 2007-09-13 07:46:00 | I am informed that Core 2 Duo CPUs are best when coupled with RAMs that run at or twice the speed of its FSB. I have a Core 2 Duo E6750 running at 3.2GHz and 400MHz FSB. I'm buying a higher-end DDR2 800 RAM than my current cheap A-Data ones, and in reviews it could easily do 1010MHz. But I'm wondering if this actually slows the memory performance in any way? |
qazwsxokmijn (102) | ||
| 590759 | 2007-09-13 09:34:00 | Are you sure 400MHz FSB is right? That chip should be running a lot faster - if I recall correctly it should have a FSB speed of 1333MHz. No, overclocking your ram to 1010MHz won't slow anything down, but it may cause your memory to be come unstable - which means system crashes. Also (depending on how far you push it of course) watch out for overheating. |
Erayd (23) | ||
| 590760 | 2007-09-13 09:46:00 | 3.2GHz - 400MHz x 8. So it's actually 1600MHz FSB (quad-pumped) now. I'm buying Transcend aXeram - at 1.8v, it does 800MHz on 4-4-4-12. A review shows they can run at 1GHz with 1.8v and 5-5-5-15 timings. |
qazwsxokmijn (102) | ||
| 590761 | 2007-09-14 02:14:00 | MY RAMS let me show you them. |
Jams (1051) | ||
| 590762 | 2007-09-14 04:10:00 | The FSB on the C2D's is Quad pumped(performs 4 transfers per clock tick) as you already know, thus you divide the FSB that Intel advertises by 4 to get the true speed of the FSB. So the actually FSB of a chip running at 1333 is 333MHz. The same applies with DDR and DDR2 but instead of 4 transfers per clock tick its 2. Thus DDR800 actually runs at 400MHz, and would give you 66MHz head room when paired with a new C2D with the faster 1333MHz FSB. Ideally when overclocking you want to running the FSB of the CPU and Memory in a ration of 1:1. Meaning that for every 1MHz you increase the CPU FSB you also increase the Memory FSB. Running the memory slowing than the CPU creates a bottleneck and running it faster offers little performance gain with tighter timings being a better option. |
Pete O'Neil (6584) | ||
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