Saturday, November 22, 2014

An update on what's happening

I've launched a new blog. It's a really really terrible webcomic which is NSFL but people with my terrible humor may enjoy. You can find it here

Public comments are now enabled.

The G.skill ECO review is coming really really soon

I'm going to release a guide on aircooled multi GPU setups

I will be posting a write up on CPU power draw scaling for Bulldozer Vishera Richland and Trinity.

I'm considering trying to create a stripped down and simplified version of the English language to lower the number of words needed to convey information

Wednesday, November 19, 2014

Voltmodding GPUs using the NCP and PCP 81022 voltage controllers [EXTENDED]

Not long ago I asked sin0822 about how to take control of the second voltage that NCP and PCP 81022 controllers generate. Well he replied and so here's a diagram detailing all the pins you would need to push an R9 285/R7 260X/R7 260 to their absolute maximum on the core and VRAM.


The only difference this time around is the blue and yellow pin on the bottom of the controller. The yellow pin controls the VRAM voltage however because I haven't found anyone who has done this mod before and I don't have any 10+K ohm variable resistors I have no idea what you should use on this pin. So if you want to do the mod I recommend you get a 100K ohm variable resistor and test for what voltage you get at what resistance and once you find the resistance that gets you the lowest voltage that you want then get a variable resistor that starts at that resistance.

The VRAM OCP is the same as always so just cut the trace and OCP is off.

For the Vcore pin soldering a 10K ohm variable resistor will get you a minimum load voltage of 1.45-1.47V. So if you want the GPU running on a 24/7 voltage I recommend getting a higher ohm variable resistor instead.

To disable GPU core OCP cut the trace of the green pin closest to the red.


Sources:
Sin0822
http://forum.hwbot.org/showthread.php?t=75953
http://www.techpowerup.com/reviews/Sapphire/R9_285_Dual-X_OC/4.html

Tuesday, November 11, 2014

Lenovo Z50-75 Intro:SSDs in cheap laptops are stupid

Yesterday I got my new Lenovo Z50-75 laptop without an operating system for 11200czk with shipping and 21% VAT. Hardware wise it's pretty good using an AMD FX7500 APU with a base clock of 2.1Ghz 4 cores and a max turbo of 3.3Ghz. The integrated GPU has 384 stream processor clocked at a peak of 533mhz. The main GPU is also has 384 cores but is clocked at ~800mhz. As of right now it only has 4GB of RAM clocked at 1600mhz but I plan to upgrade to something faster soon. The laptop it's self is made of very soft plastic but at this price point I don't mind. The keyboard is rather flexible due to this however this somewhat of a good thing because it adds extra cushioning to the keys. The only major issue I have with the keyboard is that Lenovo gave it a tall enter key and ended up wreaking the layout of the key to the left of it. So I mess up apostrophes and slashes but even with that I prefer this keyboard to the one on my mac book pro.
Now lets get to the bad stuff.
The screen is freaking awful. It's a TN as far as I can tell with good horizontal angles and an OK vertical but fails epically in the color department with very obvious gradient stepping and washed out colors. The good thing about the screen is that it's 1080p so while colors will make your eyes bleed it's high PPI and contrast make text look excellent. The LED backlight is very very strong when on it's maximum setting and in my opinion doesn't go low enough even though it has 15 different brightness levels.
Software support for this laptop is iffy since I still haven't managed to install the ELAN/Synaptic touch-pad driver and so have to deal with the stupid tap to click that is enabled form the get go.
My final issue with the laptop is the Seagate SSHDD. It manages to pull 2x the amount of power at max and minimum load of a regular mechanical Western Digital Blue HDD while doing very little for performance. Which is bad for 2 reasons the first is that it's wasting power and the second is that the SSHDD is right under my right wrist and as such is really really annoying because it creates a hotspot through the plastic casing above it. The only reason why this stupid thing is in this laptop is because it's hip to shove SSDs into everything these days.

You can expect a full review in about a month so I get some usage out of the laptop and testing.

Sunday, November 9, 2014

Vmod guide for MSI GTX 980 Gaming

Zzolio just released a great Vmod guide for the MSI GTX 980 Gaming. You can find it here and it's going to be in the useful links page.

Friday, November 7, 2014

Air benching my WTF cooling R7 260X


My good old R7 260X from WTF cooling has gotten even more WTF and now does 1450+mhz on the core.



And this is the V mod I did on the GPU. I finally got my hands on a 10Kohm potentiometer so I got the core voltage under manual control. Unfortunately a 10Kohm potentiometer is not enough to keep the voltage in "safe" territory and so the card has a minimum 3D load voltage of 1.47V. The 3rd wire on the back is hooked directly to the + leg of one of the output caps and ends in crocodile clip to allow for easy measurement of core voltage with a DMM.  
                                               Here's a shot of the side of the GPU. You can see both the potentiometer and the crocodile clip behind it
The screws on VRAM in this and the shot above are there to cool the memory because in my first runs the memory overheated and crashed when above 1670mhz. That's a massive problem on a card that has an anemic 128bit bus feeding cores 896 stream processors running at 1450mhz.


And here's the card running in my main system. The Gelid heatsink did a great job and kept the core bellow 70C° throughout my benching session. The Hynix VRAM on the other hand was terrible and kept me bellow the 1600point mark in Unigine Heaven DX11 Extreme.

Sunday, October 26, 2014

Useful links page.

So I just made a page called useful links. I will use it to deposit links that I deem useful for overclocking.
Do not worry the RAM review is coming however a recent spell of instabilities caused by a build up of dust, new BIOSes and bad GPU settings had my computer out of working order before I managed to finish the review and then I left to ski in Austria so the review is delayed but should be up soon. As an apology please accept the useful links page.
If you know an article or page that you think I should include in the useful links page just leave a comment.

Sunday, October 12, 2014

G.skill ECO 1333 7-7-7-21 2x2GB Early Expirience


Not long ago I bought a G.skill ECO 2x2GB 1333 7-7-7-21 1.35V ram kit. Now the stock settings on the kit may not sound like much but these things are great. Within 35 minutes of playing with them I had them booting 2400mhz. With better timings than many 2400mhz that you will find available in stores. Now they were not the miracles that I wanted because these sticks use PSC ICs and those are know to do as much as 2600 8-12-8-28 @ 1.85V on air cooling. Now this was early testing so I wasn't pushing very high voltages but it is very obvious that I have a pretty bad PSC kit. The settings I ended up with were 2400mhz 10-12-11-33-1T with sub timings of 5-160-12-6-24-6-7 and 1-1-1-1-3-3-2-1-3-1 using 1.75V. The primary timings are pretty bad as they are barely better than my 24/7 sticks which do 2400 10-12-12-34-2T. However the secondaries and tertiaries are pretty damn good.

I hope that I can get this kit to run CL 9/8/7 above 2400-2000mhz since that should put them way ahead of my 2000mhz 8-9-8-24 Ballistix Elite that got me my Super Pi 32M record.
I will have more updates after I'm done with the kit.

My plans for this kit are to see how high and how low it can go. Now frequencies above 2400mhz are really problematic for the IMC on Sandybridge-e CPUs so I doubt I will hit above 2500 even if the sticks are capable of that. However what I'm more intrested in is just how low I can take the CL because a low CL from my experience is key to getting a HWbot prime score so if these sticks could boot CL6/5 at 1333-1600mhz that be great.

UPDATE:
The kit is optimal at 2333 9-12-11-32-1T with secondaries of 5-156-12-6-24-6-6 using 1.8V. I still haven't done any benching with these because I need to setup my new benching HDD.
I still have to try top the frequency and try the low CL(5,6,7) max clock before doing a full write up this weekend.