Bit of a late reply, but just wanted to say thanks very much for the advice, I followed the guide you recommended and everything went smoothly
You're welcome, always good to hear that things went well for people who get advice from this thread.
I finally built my first PC and everything went pretty good. Got all the parts in and it booted up fine, but it isn't recognizing any usb keyboard, so I can't get to the BIOS. I'm stuck - anyone had this problem before or would know why my usb keyboards aren't working (I've tried 3 different ones and tried each USB2.0 outlet)?
The motherboard is a MSI Z97 Gaming 5.
Any help would be appreciated.
Did a keyboard ever work at any point, or just not work at all? There are BIOS options for a faster bootup that can skip USB device detection as well as options to disable USB ports.. but if this is a brand new motherboard, I highly doubt those settings would be set that way.
You could try resetting the BIOS settings to see if it makes a difference. Unplug the power supply from the motherboard and take out the coin battery on the motherboard. Leave it like that for a minute or two, then put back the battery and reconnect the power supply cables.
I am in the midst of finally upgrading my computer, I've been able to figure out most components without issue except two things; PSU and memory.
When it comes to PSU my shortlist at the moment is Fractal Design Edison M (rebranded Seasonic), EVGA SuperNOVA GS (another rebranded Seasonic) and EVGA SuperNOVA G2 (since it has gotten rave reviews). The issue for me is that 750W is way overkill for my system (4690K, GTX 960), so that makes the G2 less attractive. The two other options comes in 550W and 650W, however the price difference between all options is near negligible (~10-20$). Should I just wait for a deal on any of the above and does gaf have any impressions/issues with them?
And now for memory, I know that I want a 2x8gb DDR3 package, but there are literally hundreds of options available to me (220 to be exact) and the differences between them aren't always that apparent. I've read up on CAS latency, timings, etc. and that did not really make things much clearer. E.g. Corsair has a model in both
2400MHz and and in
1866 MHz for the same money, the latter of which has lower latency (9 vs 11) and lower voltage (1,5V vs 1,65V). Which of the two would be the better purchase?
anchorman128 already addressed the power supply choice and I agree, go with either the 650 or 750 watt power supply. The GTX 960 is a relatively efficient graphics card (
even a 400 watt PSU is enough for a PC with a higher end GTX 960), but you never know if that will be true for any future graphics cards you may upgrade to. From what I've seen,
a PSU in the 650 watt range would be adequate to power a flagship graphics card and still have some headroom for overclocking, which is something you'll probably want to do with that i5 4690K in the future if not now.
The issue of what RAM to get is more complex, though. Comparing speed or latency is straightforward if some numbers match up, but latency can be different for each speed and can influence RAM performance.
E.g., if you had two sets of 1600MHz RAM, one with CAS11 and the other CAS9 latency, then the set with CAS9 latency is preferable (lower latency is better). If you had two sets of RAM that were both CAS11, one rated at 2133MHz and the other rated at 2400MHz, then the set with the higher speed is preferable (higher speed is better).
But in your case, 1866MHz CAS9 is harder to compare with 2400MHz CAS11. There's a math formula that can calculate the latency of RAM in nanoseconds given both a speed and CAS number.
CAS ÷ Frequency MHz × 1000 = nanoseconds
9 ÷ 1866 × 1000 = 48.23ns
11 ÷ 2400 × 1000 = 45.83ns
Therefore the 2400MHz kit looks better, it has slightly lower latency overall despite having a high CAS number. Now there's way more to DDR3 (and RAM in general) than just these numbers and honestly you won't notice the difference in daily use (I'd like to meet someone who can distinguish a 2.4 nanosecond gap in latency), but I'm presenting this oversimplified way of looking at it to make it easier to choose RAM.
As for voltage, all RAM at or above 2133MHz will usually need to run at a higher voltage in order to operate at that speed. RAM running at 1.65V will run warmer than 1.5V RAM, but as long as your case has good ventilation, it's not a big deal. There used to be DDR3 RAM that would run at even higher voltages of 1.7V, but luckily those aren't very common anymore, everything you'll see today is 1.5~1.65V which is alright to run and is compatible. I suppose I should say that technically higher voltage RAM is undesirable and some say that running RAM at higher voltages makes for a lower lifespan of the RAM (or PC? not sure). This is really only an issue if you plan to keep the PC for more than 5 years, it's likely that you'll upgrade and replace the RAM before any heat/voltage issues come up, if at all.