I was always very happy with Ramjet memory, however, the upgraded Mac Pro desktop I bought from Ramjet for $3200. 00 in November of 2015 was okay for a while, but then progressively started having problems.
They sent me a new video card, which seemed to help, but for a while it got even worse than before.

Initially there were only problems while in bootcamp on Windows 7 running video games.
I am still able and was able to run video games on bootcamp Win7, on my original Mac Pro 4.1 that I still have and use as backup, since this Ramjet upgraded Mac Pro 5.1 is meant to replace it.
But then the new upgraded Ramjet Mac Pro problems slowly progressed to the point that sometimes I could not even boot into the Mac, which is what I primarily use for my business.

The tech who built the Mac Pro, tried to help but after a certain point, ignored the evidence that I sent him: pics of frozen Mac screen, nothing to do with gaming on Win7, and told me he didn't know what to say. Asked me to send the Mac to him.
Difficult since I use it for my business, but I agreed and emailed him questions about details of that. They have not responded to that last email or any emails since Ive sent since then. One of them a timeline and progression of what happened. I thought they were still willing to work with me. However after, weeks went by then months with no response.
I had to contact my bank about a credit card purchase from a completely different vender, that failed to work and the vendor ignoring my emails. The lady at the bank was nice and very helpful, so, when she asked me if there was anything else? I hesitantly, since I didn't want to cause friction with Ramjet, since I value them for the RAM and the way they had always been responsible. I told her of the impasse with the tech that sold me the Mac Pro desktop, and the resulting problems, and that they failed to respond.
I have a feeling the bank asked for a full refund, which is not what I had asked her to do. I wanted only a $500.00 refund, since the computer is not doing what they claimed it would do.

She promised to personally speak to the tech to try to arbitrate on my behalf.
That was a mistake on my part, since it seems she did it differently, and antagonized Ramjet, who are now entrenched in the false belief that the whole problem was the one particular game, Guild Wars II.

At this point the old computer is still able to run Guild Wars II (at fully reduced graphics, maximized for speed) and other video games on Bootcamp Windows 7, but this new one I cant. (right now, it is stable if I stay only on the Mac, but it continues to have problems if I boot into bootcamp win7, although using VMWare Fusion to access business programs only on bootcamp works fine. Its never been possible to play any video games that way).

Im using the RamJet Mac Pro for business and able to play guild wars II ONLY on the Mac version of the game; also at fully reduced graphics, maximized for speed.
I cannot play any other games that require a PC on it.

I would not advise buying any of the rebuilt/upgraded Macs they sell, and am very disappointed in their behavior.