Features & Specifications
Famous for extravagant features, Corsair gets back to the basics with its Vengeance LPX series. That is, if your definition of the basics is to strip out whatever doesn’t make a product faster. Vengeance LPX doesn’t have RGB or old-school activity lights that made Corsair famous with the case mod crowd, but it does include the firm’s old-school fan and red/blue/silver trim kit.
The modules themselves are covered in nothing more than stamped aluminum heat spreaders, lacking any of the fancy heat pipes and electrical connectors that Corsair once used to monitor heat and adjust fans externally.
And talk about kicking it old school, these DDR4-4600 modules require DDR3-level voltages simply to get to their rated data rate and timings. If you thought the 1.35V signal limit to Intel’s memory controller has been in place since Skylake, you’d be mostly right.
Intel’s stated voltage limit was intended to reduce the component degradation (such as electromigration) that occurs more quickly as components are shrunk or the voltage difference is increased, but overclockers found that increasing the memory controller voltage allowed them to likewise increase DIMM voltage without overstressing the memory controller. User forums were tossing around the notion that the difference between the memory controller and DIMM signal should be no more than 150mV, and it turns out that certain motherboards will respond to a high DIMM voltage by increasing that of the memory controller. That’s just one of several things Corsair likely considers when recommending a board from which to evaluate its 1.50V DDR4.
Apart from the CPU core voltage that we set, the voltage levels pictured above are how this motherboard responded to the 1.50V requirement of Corsair’s DDR4-4600 XMP. Other optimizations for testing memory of such high data rate were that the CPU be nearly perfect, that the motherboard have only one slot per channel (to reduce possible noise), and that the pathways connecting that slot to the CPU be both short and well optimized. The motherboard is MSI’s recently reviewed Z370I Gaming Pro Carbon AC.
We moved straight from our Z370I Gaming Pro Carbon AC review to this Vengeance LPX DDR4-4600 evaluation, leaving the fixed 4.80 GHz CPU clock at 1.30V in place. The entire test configuration can be seen in our Z370I Gaming Pro Carbon AC Review. Comparison modules were chosen for a specific purpose: G.Skill’s DDR4-3866 and Super Talent’s DDR4-3733 for their high data rates, and Super Talent’s DDR4-3000 for its dual-rank organization. Yes, single-vs-dual rank is still a compelling performance factor.
The G.Skill modules are readily available at a middling price, but the Project X DDR4-3733 can only be ordered directly from Super Talent’s distributor, Ma Labs, by those who have set up an account. Meanwhile, its F3000UX16G can be found “on the street,” but only by purchasing two of the individual F3000UB8G modules that comprise this dual-channel kit.
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Why even sell 4600 if its slower then 3200.
I'll also note that the F3000UX16G kit is the only (?) dual-rank set, and a DDG search did not find any in stock -- and where listed were priced from $186 to $200.
That said, here's hoping the fine folks at THG can pull together the AM4+ components for a test-drive of a new RyZen APU at similar levels. Make it so, Corsair!
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http://www.tomshardware.com/reviews/teamgroup-dark-rog-16gb-ddr4-3000,4997.htmlThe T-Force Dark ROG is available for $192 at Newegg.
We set the 1.35V test limit back when people were having trouble with memory controller damage from higher-voltage RAM. The workaround was to increase the memory controller voltage in order to reduce the voltage difference between the memory controller and the memory signal, but we never employed it. Yet some manufacturers have figured out that some motherboards will now use the workaround when configured with 1.50V RAM.
We agreed to test the kit before taking note of its test-violating voltage level. Rather than force a violation out of the other kits, we limited the 1.50V test to DDR4-4600's XMP configuration. If you look at the charts you'll see it performed better at DDR4-4000 with optimized timings than it had at DDR4-4600 using XMP timings? The DDR4-4000 test, like those of the competing modules, was run at 1.35V.