Ensure stable power supply around the clock for your Patriot Viper III with 2x8GB and 1866 RAM.
Ensure stable power supply around the clock for your Patriot Viper III with 2x8GB and 1866 RAM.
Your setup is stable at 1866MHz with those settings, but increasing to 2133MHz at 1.7V could affect performance. Check compatibility and stability before pushing further.
take the photo of the burner and check which RAM modules fit. The 2133 model is still quite slow, so a 1.7V processor seems necessary. This hints at a low-end 4Gb SDRAM chip since Hynix can handle voltages above 3000. Voltage won’t hurt the CPU much, so you can push as high as your motherboard allows and the CPU tolerates it. Your top performance will mainly depend on the RAM modules themselves to dispel myths about IMC failure at higher voltages.
I haven’t tested any solid 4Gb modules (except good ones from Samsung or Micron), but usually I stick with 1Gb modules for 2864C10 at 2.1V. Running Prime95 under heavy load on an I7 chip works fine at 1.7V, while my 4Gb module stays stable at 2.1V despite heavy stress.
On the other hand, my 1Gb module is fine with 2864C10 at 2.1V, but it struggles above 2.2V or 2.4V. It seems Micron modules handle higher voltages better, though they’re not always reliable. The X58 doesn’t support voltages beyond 2.2V, and I’m not sure if it can run at 2100/2200 without issues.
Micron modules love high voltage and their timings improve with it, although there’s no voltage scaling for TRFC. Generally, you’ll hit degradation around 2V, especially with older chips like the Hynix 2Gb model I tested. I’ve noticed strong performance drops above 2.5V, so 2800C11 at 2.1V should be fine, but not much more.
X58 boards usually cap at C11 and don’t support higher voltages safely. I’m hoping the chip is decent in cold temperatures, but overall it seems limited to around 2800C11 stable at 2.1V. It’s not ideal if you’re aiming for anything beyond that.
you're experiencing some instability with your 4790k at 4.8ghz and 1.3v. even at 2400mhz, the RAM doesn't overheat much when you adjust the timings to 20-20-20-60 and 1.7v. i also found a few random 4gb ddr3 sticks from hynix online, which might help.
I tested my Patriot Vipers at 1.75V for daily use when they had 4770k. I think this is secure for DDR3.
the pcb seems to be crafted by hynix? however, the voltage specs indicate a samsung 4gbit model. refer to the photo for the top two sticks—they match hynix’s 4gbit architecture and should handle over 3000 c12 at around 1.65v. take the vccsa and io voltages from this clip: vccsa equals 1.312v, digital i/o is 1.248v, analog i/o 1.256v. begin with ddr3 at 2800 primaries set to 12-15-15, then adjust vdimm in 200mhz steps. increase vdimm if needed, especially since we’re working with low voltage (<2v). you can lower the requirement by adjusting tcwl settings—options like 1 or 2 below CL. suitable values are 3000, 12-16-16 or 3200, 12-17-17. the board supports multiple pci slots, so consider a pci debug card (like a pc analyzer) for easier troubleshooting and diagnostics. this setup usually costs around $3. also, purchase a ch341a (around $2-3) and flash bios to z97-a or z97 deluxe. with my p5q asus bios damaged, updating it to a p5qd turbo boosted the fsb capability from 530 to 570, confirming their low-end still relies on firmware fixes. you won’t worry about corruption since you can reset and check settings directly. the chip is mounted in the bottom right of the asus z97 on the rear heatsink.**
those two blue Hynix sticks seem pretty strong. If I’m looking, I might need to upgrade to Haswell myself just to check performance, given the affordable Z97 + G3258 combo available. The 3600+ should fit within Haswell IMCs. I have a couple of 2Gb Hynix CFR chips; they’re not the fastest but should work as a reference. Probably worth testing the maximum frequency of my GDDR sticks since I still need more Bloomfield CPUs for 3400+ on X58. It looks like above 1.86V VTT starts to hurt these chips, though I’m not sure yet—my best W3503 ran at 1.94-1.98V with VTT 1.94-1.98V. The voltage range after 775/1366 is really low, only around 2.2V on top boards, and even then it’s limited. Also, the 2400 voltage isn’t great, and skipping it for 2666 or 2800 might help. You could also try a BCLK strap that handles over 200BHz and just overclock the CPU and RAM if needed. Running a four-stick setup while you’re at it could give extra memory capacity and ease some of the bottlenecks, especially with those Tri-Rank issues.