Solved

cpu (95w) upgrade to best match with hd7870

hello. i currently have a dell xps 7100 with a 785g amd motherboard, phenom 2 1035t x6, 4 gbs of ram and a radeon 5870. i have a 460w altec psu (http://i.imgur.com/ydn2VIz.jpg).

if it helps - here's my full paste of specs from cpu-z

http://pastebin.com/kJ0HY6Dp

i picked up a sapphire 7870 from newegg and i'm not very impressed with the results. in furmark, i'm going from 36fps (1080p no aa) with the 5870 - to 43 fps (same settings) with the 7870. in 640x360 res, i go from 70 to 100 fps. in my games, i get a minimal increase in fps. i'd like to squeeze as much as i can out of this 7870 with a new cpu, and if i can't get a good upgrade, i'm going to return the card because the small increase in fps isn't worth the $150.

i need some direction as to what kind of cpu would be best for me paired with the 7870. do i just need one with high clock speed, or should i go for high cores instead/also? in addition to that, how many cores would be ideal for games released in the last couple of years, and would those same number of cores be best for futureproofing?

i was thinking around a 3.5-3.8 ghz with four cores, but this was all i could find:

http://www.newegg.com/Product/Product.aspx?Item=N82E16819113287

...and that cpu has a nearly identical score on cpubenchmark.net as my 1035t.

otherwise, i would have to go with six cores and i've heard that a lot of current games don't take full advantage of six cores.

so, in a nutshell i just want to hear what you guys think as far as a cpu recommendation to pair with my 7870 where i would not bottleneck (or avoid as much bottleneck as possible). btw, i do not want to upgrade my psu or mobo - just the cpu.

thank you!
6 answers Last reply Best Answer
More about cpu 95w upgrade match hd7870
  1. I think the problem is your PSU. For a system using a single AMD reference design Radeon HD 7870 graphics card AMD specifies a minimum of a 500 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 28 Amps or greater and have at least two 6-pin PCI Express supplementary power connectors.

    Which brand 7870 did you buy?

    And if you want upgrade your CPU you're better off with FX 6300. One more thing you'll have to upgrade your motherboard aswell as it doesnt support AM3+ socket
  2. xhanku said:
    I think the problem is your PSU. For a system using a single AMD reference design Radeon HD 7870 graphics card AMD specifies a minimum of a 500 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 28 Amps or greater and have at least two 6-pin PCI Express supplementary power connectors.

    And if you want upgrade your CPU you're better off with FX 6300. One more thing you'll have to upgrade your motherboard aswell as it doesnt support AM3+ socket


    thanks for replying.

    well, the 5870 uses more power than the 7870. since the 5870 shipped with the dell, i just thought the 7870 would run fine. the only real difference is that the 5870 is 1gb, and the 7870 is 2gb. but i've read the additional pull is just like 10w.

    i'm def not looking to upgrade my mobo - only the cpu.
  3. xhanku said:
    I think the problem is your PSU. For a system using a single AMD reference design Radeon HD 7870 graphics card AMD specifies a minimum of a 500 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 28 Amps or greater and have at least two 6-pin PCI Express supplementary power connectors.

    Which brand 7870 did you buy?

    And if you want upgrade your CPU you're better off with FX 6300. One more thing you'll have to upgrade your motherboard aswell as it doesnt support AM3+ socket


    btw it is a sapphire oc edition 7870.

    so it's apparent that i would need a new motherboard with a am3+ socket if i want any kind of half decent cpu, correct? is there a cheap 50 dollar or so motherboard that i can grab that would be compatible with my setup without upgrading the psu?
  4. diamenz said:


    btw it is a sapphire oc edition 7870.

    would this fair well? it's only a triple core tho... but it has an am3 socket.

    http://www.newegg.com/Product/Product.aspx?Item=N82E16819103886


    Your current CPU is OK. You have a better CPU than that athlon. If you want to really upgrade it get phenom ii X6 only like 1090T or 1100T. But its very old now. And
  5. Best answer
    diamenz said:
    xhanku said:
    I think the problem is your PSU. For a system using a single AMD reference design Radeon HD 7870 graphics card AMD specifies a minimum of a 500 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 28 Amps or greater and have at least two 6-pin PCI Express supplementary power connectors.

    Which brand 7870 did you buy?

    And if you want upgrade your CPU you're better off with FX 6300. One more thing you'll have to upgrade your motherboard aswell as it doesnt support AM3+ socket


    btw it is a sapphire oc edition 7870.

    so it's apparent that i would need a new motherboard with a am3+ socket if i want any kind of half decent cpu, correct? is there a cheap 50 dollar or so motherboard that i can grab that would be compatible with my setup without upgrading the psu?


    Well yeah there are that cheap AM3+ mobos but I'd say get this
    http://pcpartpicker.com/part/asus-motherboard-m5a78lmusb3

    or

    http://pcpartpicker.com/part/msi-motherboard-970ag43

    And fx 6300 will be very good with it. By this setup you'll be able to push your 7870 to the max. Hope it solves your problem. Sorry for the late reply I kinda missed :heink: your updated post sorry :/
  6. No CPU that your motherboard would support is worth the cost. You would need a motherboard and CPU to do significantly better. Did you uninstall your old driver and reinstall to the latest from AMD for the 7870? I don't particularly trust that PSU either.
Ask a new question

Read More

Motherboards CPUs AMD Dell Studio Xps FPS Phenom