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DIAMOND Radeon HD 7790 7790PE51G 1GB 128-Bit GDDR5 PCI Express 3.0 x16 CrossFireX Support Video Card

  • 1GB 128-Bit GDDR5
  • Core Clock 1175MHz
  • 2 x DVI 1 x HDMI 1 x DisplayPort
  • PCI Express 3.0 x16

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  • Specifications
  • Warranty & Returns
  • Reviews

Learn more about the Diamond Multimedia 7790PE51G

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 5 years
  • Limited Warranty period (labor): 5 years
  • Read full details

Customer Reviews of the Diamond Multimedia 7790PE51G

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  • Cory C.
  • 8/24/2013 12:50:51 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year

4 out of 5 eggsAcceptible Card

Pros: Plays all my games on very high/ ultra settings except for the tress Fx hair in tomb raider 2013 @ a resolution of 1680x1050 60Hz, windows desktop graphics performance & 3D business/ gaming score of 7.7., good value for $money$

Cons: Ugly Card, Noisy ugly heat sink fan (I like to hear my fans working, but no that loud lol)

Other Thoughts: I love the performance but if u are like me and like nicely styled cards I don't recommend but if u never look inside your rig or don't care on looks I highly recommend this card

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  • Daneyand S.
  • 8/8/2013 10:24:27 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week

1 out of 5 eggsStay away

Pros: None

Cons: I agree with the other reviewers, this particular card is almost always stuck at a core clock of 300Mhz?!?!? I have the 2GB Gigabyte brand of this card that works great so this is not acceptable! Stay far away and buy another brand of 7790.

Other Thoughts: The 7790 is one of the best graphics processors for the money / heat / noise / performance. Just not this particular card.

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  • Anonymous
  • 6/16/2013 10:28:29 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

1 out of 5 eggsWorst experience with a GPU I have ever had in my life.

Pros: Good performance for the price (when it works). 40-60+ fps in all the latest titles at high/max settings on my FX 6300 build with MSAA @ 1080p (when it works). Sometimes dips into the mid 30s but it's not very common (when it works). Very quiet. Decent cooling.

Games promo that comes with this card is an outstanding value, wow.

Cons: FIRST OF ALL, this card is *NOT* 256-bit, it is 128-bit, every GPU related utility under the sun will verify this as soon as you install it. Plus you can tell it does not perform like a 256-bit card. But the description is why I chose this card over the others. MISLEADING. Very disappointed. I have contacted newegg about this (with a screenshot even) but the description has yet to change. Even the official spec sheet for this card says 99.2 GB/sec. I should have known to look... but then again I can't remember the last time I saw a video card advertised with incorrect memory bus width (and for so long).

Secondly my DVI port will at times output with extremely low gamma no matter what I do. HDMI is never a problem so I use it for now, but I may need to use that port on my LED for another device (i.e. PS4) someday. Thus, this is simply not acceptable.

Finally -- while I'm not sure if this is driver or hardware specific (perhaps both) -- this card's core clock will get stuck at 300MHz. Not because of overheating, either. Basically after you install the driver (no matter what version) you will get expected performance, then if you reboot, the core clock is stuck at 300MHz. Then you have to keep rebooting until the clock performs normally. Making system changes like updating bios or other drivers increases the chances of it "kicking in" for the next session but it's still not a guarantee. I have no idea why this happens, but I'm not the only one -- I've seen others complain about this issue with the 7790 on at least three different message boards, all recent posts. This leads me to believe it is a widespread chipset/VGA bios/driver issue with the 7790. It seems to be getting stuck in low power state mode for no particular reason whatsoever. What good is ZeroCore if that's what we have to deal with? I have manually disabled the ultra low power state and while it increases the chances of it working, it's still basically a 1 in 5 chance of clocking properly after booting into Windows. I know it's not due to heat because when this card actually works right, I have been able to game for 5+ hours straight with no issues whatsoever. The DDR5 clocks fine, though. Not like it matters because all games will run at <15fps at only 300MHz core clock, thus making them unplayable for the time being.

All of this is completely unacceptable. I have never had to deal with something like this from a video card before. AMD has hit a new low.

Other Thoughts: Honestly a huge waste of time. HUGE. This is one of the worst PC-related purchases I have ever made. I am debating on whether I should RMA and get a card from AMD's rival (with a 192-bit memory bus by the way) for about the same price, or hope that AMD addresses this issue with a driver/new vga bios/whatever is necessary. Also I don't want to lose my free games. I would hate to RMA a card that is probably okay if AMD would just address this issue, but they are known to drag their feet. Plus the DVI issue with my card seems to indicate that the port is defective.

Also worth noting: Driver defaults the clock speed at 1175MHz but the Diamond website for this card says 1075MHz. Also it says the memory is 1550MHz but the driver sets it at 1575MHz; I clock both to Diamond's specification, not that the core clock kicks in most of the time anyway (lol).

Max GPU temp in Furmark is 75C, power draw and everything else looks good.

System specs: AMD FX 6300 @ stock / MSI 970A-G46 mobo / 8GB DDR3 @ 1600MHz / 750GB SATA hdd / Seasonic 500W PSU / Win7 x64

Bottom line: AVOID THIS CARD.

3 out of 3 people found this review helpful. Did you? Yes No

  • Anonymous
  • 6/5/2013 1:44:35 PM
  • Tech Level: Somewhat High
  • Ownership: less than 1 day

3 out of 5 eggsHave the same 256 bit question...

Pros: ??

Cons: ??

Other Thoughts: I have been eyeing this as well, and actually holding off buying a 7790 until I verify the memory bandwidth. The issue is that even with 256 bit memory, I don't know how much it'll boost performance as the GPU has to keep up with it. It will only perform as fast as the slowest component anyway so I reckon the 2gb Sapphire will be a better choice with it's better backplate...?? I review things fairly regularly and wouyld love to have a crack at comparing these to my HIS 7770 card.

1 out of 2 people found this review helpful. Did you? Yes No

  • Luke D.
  • 5/21/2013 4:28:20 PM
  • Tech Level: High
  • Ownership: less than 1 day

5 out of 5 eggs

Pros: TDP 85watts.
Benchmarks between 7770 and 7850

Cons: It being called a 7790. Won't be as popular when it is better than the 7770.

Other Thoughts: Their website says 99.2GB/s for memory bandwidth. At that rate with the clocks given, it is 128-Bit memory.

1 out of 2 people found this review helpful. Did you? Yes No

  • Will G.
  • 5/5/2013 9:23:04 PM
  • Tech Level: Somewhat High
  • Ownership: less than 1 day

4 out of 5 eggsdont own but have quesiton

Pros: Nice and small, power on end, great for small low power builds,

fast for price and efficient

Cons: 128 bit and 1gb of memory

Other Thoughts: If a manufacturer could respond that would be great. The Diamond website also says 256bit memory, but all other 7790s have 128 bit so....

I just want to know whether this really has 256bit memory if so I will definitely be buying it.

1 out of 3 people found this review helpful. Did you? Yes No

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