AMD Teases Radeon HD 6990
by Anand Lal Shimpi on March 1, 2011 12:51 PM EST- Posted in
- GPUs
- Radeon
- Radeon HD 6990
AMD just sent over a bunch of shots of an upcoming product that we may or may not be presently benchmarking: the Radeon HD 6990. Check out the gallery for the pics.
Update: AMD accidentally gave us a shot of the Radeon HD 6990 without the fan shroud attached. Apparently that image reveals a bit too much about the product and AMD asked us to remove it. Sorry guys :)
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GeorgeH - Tuesday, March 1, 2011 - link
For the impatient, reliable sources put the twin 6970 GPUs in the 6990 at 830MHz/5GHz (Core/Memory) vs a 6970's stock 880MHz/5.5GHz. You can apparently bump core clocks up to standard 6970 speeds, but doing so will break the 300W ATX spec.Stuka87 - Tuesday, March 1, 2011 - link
Well, that would make sense as to why they are declocked.Thats seems like an awful lot of power to be supplied by just two aux power connectors though. I wonder if there is much over head (or maybe better efficiency) of having this rather than two individual 6970's.
Shadowmaster625 - Tuesday, March 1, 2011 - link
If you break down the amount of current per wire, it is only a couple amps at most. Your typical kitchen toaster pulls many times more current through that size wire. One 12AWG wire is rated for 9 amps.bobsmith1492 - Tuesday, March 1, 2011 - link
Two 8-pin power connectors, half of the wires are +12V and half are ground return.So, there are 8 +12V wires.
For the 300W spec at 12V, 300/12 = 25 amps. With 8 wires, that's 3.125A per wire.
That's a fair amount... remember the toaster is running at 120V, so it can take a few volts of drop in the wiring without affecting the current draw much. At 12V, you're losing almost 10% of your available voltage for every volt of drop.
Goty - Tuesday, March 1, 2011 - link
The voltage regulation provided by your PC's PSU is significantly better than what your toaster gets, though.BugblatterIII - Tuesday, March 1, 2011 - link
You haven't overclocked your toaster?Iketh - Tuesday, March 1, 2011 - link
of course i have, i'm now getting 800 F, that's a 20% bump from stockStas - Wednesday, March 2, 2011 - link
Love overclocking toasters. Never have to worry about cooling xDGami - Thursday, March 3, 2011 - link
Just house fires!bobsmith1492 - Tuesday, March 1, 2011 - link
It can only regulate at the PSU, not at the other end of the wires where the video card lives.