News site DailyTech has gotten its paws on AMD's upcoming ATI Radeon HD 4890 videocard from an undisclosed source based in Taiwan, and has thus been able to confirm rumored details of the new card's spec sheet.

Built around the RV790 core, the Radeon HD 4890, as received by DailyTech, comes with a core clock of 850MHz . The site also reports 1GB of GDDR5 memory running at 3,900MHz resulting in 124.8 GB/s of bandwidth. Final memory specs could change, however, as the card DailyTech received came with Qimonda chips, which declared insolvency (went bankrupt) back in January 2009.

No word yet on a projected price point or release date, but not to be outdone, Nvidia plans to go head-to-head with ATI's 4890 with its GeForce GTX 275. According to reports, the upcoming GTX 275 is being built around the G200b GPU core with 240 shader processors chugging along at 1,404MHz. Other specs include 80 texture units, 30 render back ends, and a 448-bit memory interface. GPU and memory clockspeeds are expected to debut at 633MHz and 2,322MHz, respectively.

Look for the GTX 275 to launch on April 9, 2009 for somewhere between $230 and $280.

(Image Credit: DailyTech)