Could I upgrade ATI Radeon HD4850 to HD6770?

APPROXIMATE PURCHASE DATE: This week (the sooner the better), and before Christmas

BUDGET RANGE: USD $100 - $150 Before Rebates (though good Rebates would be welcome)

USAGE FROM MOST TO LEAST IMPORTANT: General upgrade for gaming, noticed some quirky things when testing new Old Republic game and thought it might be good to upgrade anyhow but not to sure on if the upgrade I am looking at will work.

CURRENT GPU AND POWER SUPPLY: ATI Radeon HD4850 512MB GDDR3 PCI Express 2.0 x16 and 475W PSU

OTHER RELEVANT SYSTEM SPECS: Dell Studio XPS Desktop 435T/9000, Intel Core i7 920 @ 2.67Ghz, 6GB RAM (6x 1GB 1066), Dell S2409W LCD Display (1920 x 1080 max, 75 max refresh), 2x 500GB Hard Drives with RAID 0, Creative X-Fi Audio, Microsoft Vista Ultimate

(Might be upgrading OS to Win 7 Ultimate and RAM from 6GB to 12GB in the near future)

PREFERRED WEBSITE(S) FOR PARTS: (Have a $100 credit to use there)



MONITOR RESOLUTION: No real preference but at least 1600 x 1000

ADDITIONAL COMMENTS: I was thinking about getting the XFX ATI Radeon HD6770 1 GB DDR5 VGA/DVI/HDMI PCI-Express Video Card HD677XZNLC as listed on at the link below, right price, reviewed well on Tom's, and has a nice rebate. Do you think it would be a good upgrade for my system and if so will it work okay with the 475W PSU?
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More about could upgrade radeon hd4850 hd6770
  1. While I was thinking of upgrading to the ATI Radeon HD6770 I would welcome any suggestions for other similar cards that might be an even better choice given my system. Thanks for the help.
  2. 4850 to 5770/6770 is more like a sidegrade imo. have you looked at the 6850 cards,3067-7.html
    what is the ampere rating on your pc's psu's +12v rail? i think it can run a 6850 but a confirmation would be helpful.
    Sapphire HD 6850 PCIE Video Card (100315L) $144.99 Price after rebate: $129.99
    ASUS EAH6850 DC/2DIS/1GD5/V2 - AMD Radeon HD 6850 - GDDR5 1 GB Video Card $159.99 Price after rebate: $139.99
    recommendations are based on price.
  3. The HD 6770 is in actuality a re-badged HD 5770. It does provide better performance than the the HD 4850, but the performance increase for the price you pay is not really worth it in my opinion.

    The HD 6850 would be a significant performance and it is within your budget. Also your Dell PSU will be able to handle it. The following HD 6850 is $130 after the $15 rebate:
  4. Euh, you mean a 6850 is dx10 ?
  5. According to this posting:

    The 475W PSU on the XPS 435T is rated for 16 amps on the PCI-e power connector and 32 amps on the 12v rails.

    Thanks a lot for all the posts and advice, I will research everything more tomorrow. From the posts it looks like I should skip the 6770 for sure and go for the 6850 or for a little bit more the 6870. The Dell PSU should be able to handle the 6870 without any power issues right? Thanks again for all the replies, I really appreciate it.
  6. It is a pity you´re running an i7 920/6GB ram, with a single HD4850.

    If you crossfire your HD4850 you´d get a performance similar to GTX 470, GTX 560 Ti, HD 5870, HD6950, but without the benifits of the DX11. You might need a new PSU for that tough.
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