Geil Ultra 2000MHZ

Memory

Overclocking

Since GeIL presents the Ultra Plus-series as overclocker modules, my main focus in this article lies in proving GeIL either right or wrong. There was a small setback when testing these modules, since the AMD 785G chipset can’t reach memory speeds over 900MHz (DDR3-1800) and the IMC (Integrated Memory Controller) of the Phenom II isn’t as willing as the newer 6-core IMC either. That said, AMD chips benefit more from lower latencies and thus I have searched the best speeds on fixed, low latencies. CAS5, 6 and 9(stock) have been tested, with optimized main timings and all sub-timings on AUTO set in the BIOS.

First the initial overclocking results, shown in CPU-Z, a program used to show exact information on the current system.

NB: You will find different CPU information in a few CPU-Z screenshots. I didn’t actually look whether I had the CPU unlocked to quad core or not. This does not impact testing, as the tests are all memory related and do not scale with CPU cores nor its frequency.

Overclocking results

All results were attained with the stock memory voltage of 1.65v. Raising the voltage barely brought any overclocking potential so I decided to stay at a 24/7 voltage.

DDR3-1280 CL5-7-5-18


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The lowest stable timings with the maximum frequency I could get out of these chips. These are of course CAS5 results, but not very impressive due to the low memory frequency.

DDR3-1700 CL6-8-6-20


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This is probably the sweet spot of this memory. At a maximum of 850MHz (DDR3-1700) these sticks can run at CAS6 with tight timings and CR (Command Rate) 1. I’m currently running these sticks at ~DDR3-1650 C6 due to the focus on the CPU overclock, which is always more important than the memory overclock, when testing in real world applications.

DDR3-1800 CL9-9-9-28


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Stock timings at its highest possible frequency on the AMD 785G chipset. These results are not to be taken as a reflection of the maximum frequency possible on the DDR3-2000 CL9 Ultra Plus, since this will probably lie between DDR3-2000 and DDR3-2100 CL9. As a matter of fact I can’t test nor prove this statement until I upgrade to a AMD 8-series chipset. Any motherboard supplier out there feeling an itch? You will be rewarded!

At CAS7 and 8 frequencies there were no noticable performance increases over DDR3-1700 CL6, so these results are left out to not overflow our readers with useless data.

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Last modified: February 15, 2011

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