FormatC :
ingtar33 :
that 1150 clock speed is actually on the low side. on several other forums i frequent people are hitting mid 1300's pretty consistently with aftermarket air coolers, and 1400s on water.
it seems the r9-290x is pretty much identical clock for clock to the 780ti... so putting a non-reference cooler onto it is almost mandatory; because when it's not temp throttling it's pacing nvidia's $700 monster.
The BIOS was locked. Without increasing the core voltage my sample runs only 1175 max. It is a lottery which numbers you get
crap, you're right. i forgot about that. the people hitting those numbers are using custom bios... apparently the process of flashing a bios into the r9-290/290x is pretty simple and straight forward.
heck... on one of those forums they're finding that all Powercolor r9-290 can be flashed and "unlocked" into r9-290x (about half the xfx versions can too, no others will work like that though)
warezme :
This looks like a nice kit. The only question I would have is, how does this perform in an enclosed box? How much does the heat being dumped inside your computer effect the overall efficiency. I don't like to see reviews where the testbeds are open since they don't reflect real world installations.
case airflow is one of the least understood dynamics in the DIY community. Most people just say f-it and get a haf with all that open mesh area and fans. As anyone who's been forced to make high end systems work in the summer in phoenix with no AC can tell you, those cases actually aren't the best for airflow and venting heat. (they can be made pretty good, if you are careful with fan placement, but often they'll under-perform cases with less mesh).
Good case airflow is about obstructions, air direction and convection. One of the things that breaks up convection is excessive mesh. another is side-panel fans. generally i won't touch them unless i'm having issues with VRM/MB cooling and they're positioned to blow down onto that part of the board.
Pushing air up through the case is often ideal, so i look for ways to increase vertical airflow. This puts a premium on vertical orientation of CPU tower heatsinks, and top vents. I'm not a huge believer in the top back vent... though it can create a little airflow over a motherboard when you're using a watercooling system for the cpu, generally it's not a fan i pay much attention to, though i do use it if the mesh on the top of the case doesn't extend into the back corner, it CAN break up good case airflow.
Sorry i got off on a tangent. I guess all i'm saying is something like a r9-290x/290 venting hot air into a case isn't a huge concern to me. if you have your case airflow worked out right, it shouldn't be an issue at all.