Silicon Graphics Inc said Friday that it had registered with the Securities and Exchange Commission for an offering by the company of 6 million shares of stock in its MIPS Technologies Inc embedded and RISC processor unit. SGI says the shares are being as part of its previously-announced initiative to make a multi- step divestiture of its interest in MIPS, which it spun off last July with an IPO. MIPS itself won’t receive any proceeds from the offering. SGI says the offering will be subject to market and other conditions, but if it sold the shares at Friday’s Nasdaq closing price of $39.9375, the company would see proceeds of $239.6m before transaction fees. Goldman Sachs, Credit Suisse First Boston and BancBoston Robertson Stephens Inc have signed on to be the underwriters of the offering.