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Subject: RE: overclockabilly
Date: Wed, 7 Feb 2007 15:26:22 -0800
Message-ID: <BB375AF679D4A34E9CA8DFA650E2B04E025BE39B@onstor-exch02.onstor.net>
In-Reply-To: <20070207121038.64642c91@ripper.onstor.net>
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Thread-Topic: overclockabilly
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References: <20070207121038.64642c91@ripper.onstor.net>
From: "Brian Stark" <brian.stark@onstor.com>
To: "Andy Sharp" <andy.sharp@onstor.com>

Andy,

Good news...what you outlined is already what we're planning to do.  The
SiByte frequency will be selectable by resistor settings, and we'll
populate an 800MHz part on at least 1-2 boards.=20

As for the TXRX GigE port, sorry to say, but the 2 * FIFO configuration
takes all the pins that the 3 * GE ports use.  I don't see a good way of
getting around the LUC on a Bobcat.  Once I get the layout further
along, I'll look in more detail at modifying the LUC Verilog.  No
promises here, but to do what you want, either you're gonna have to
support the LUC header in software or I'm gonna have to modify the LUC!=20


Brian




> -----Original Message-----
> From: Andy Sharp=20
> Sent: Wednesday, February 07, 2007 12:11 PM
> To: Brian Stark
> Subject: overclockabilly
>=20
> Hi Brian,
>=20
> I would like to ask if we could make at least the first few=20
> boards or first small run of boards with the ability to=20
> overclock the GPU.  I'm really sick of the SSC moniker, but I=20
> can't think of something good to replace it with.  GCPU, GPU,=20
> GPP, none are quite right.
>=20
> Anyway, I'd like to be able to run various performance/limit=20
> tests w/o having to have different boards.  Possibly make a=20
> board for me with an 800MHz part on it, and make it able to=20
> set the clock speed lower or higher with a prom command or a jumper?
>=20
> I figure it's got to be a small difference or no difference,=20
> but better to ask now before we actually have any boards.
>=20
> Cheers,
>=20
> a
>=20
> PS How much work would it be to connect the pins of the=20
> unused gigE port on a Bobcat TXRX directly to a MAC?  4=20
> wires?  I haven't given up on this.  I never give up.
>=20
>=20
>=20
